PT PT200MB Owner's manual

Innovative Measurement Electronics

PT200MB

Industrial

Weighing Indicators

Instruction Manual Rev. 20220622

CONTENTS
Table of Contents
NOTICES..............................................................1
1  SAFETY.................................................................1
2  PRECAUTIONS.....................................................1
DESCRIPTION.....................................................2
1  INTRODUCTION...................................................2
2  MODELS AND FEATURES...................................2
3  STANDARD SUPPLIED ITEMS............................3
4  ACCESSORIES SOLD SEPARATELY.................3
5  DEFINITIONS AND CONVENTIONS....................3
SPECIFICATIONS................................................5
GETTING STARTED............................................6
1  THE STEPS BEFORE OPERATION.....................6
INSTALLATION....................................................7
1  GENERAL RULES.................................................7
2  MECHANICAL INSTALLATION.............................7
2.1  CONNECTIONS............................................8
3  CONNECTING THE LOAD CELL..........................8
4  POWER SUPPLY AND GROUNDING..................8
5  ENERGISING THE INSTRUMENT.......................9
6  CONFIGURING AND CALIBRATION....................9
6.1  PROGRAMMING..........................................9
6.2  CALIBRATION............................................10
6.3  LOCKING CALIBRATION...........................10
7  CHECKING SCALE PERFORMANCE................10
8  RS-232C PORT CONNECTION..........................10
9  RS-485 AND MODBUS CONNECTION..............11
10  DIGITAL INPUT CONNECTION........................12
11  DIGITAL OUTPUT CONNECTION....................13
12  SETPOINTS......................................................13
OPERATION.......................................................14
1  KEYPAD AND DISPLAY.....................................14
2  BASIC WEIGHING..............................................15
2.1  Zeroing........................................................15
2.2  Taring..........................................................15
2.2.1  Multi-taring..........................................15
2.2.2  Tare/Clear..........................................15
2.3  Gross/Net Function.....................................15
2.4  Printing........................................................15
2.5  Totalising Weights......................................16
3  ADVANCED USER FUNCTIONS........................16
3.1  f Function Key Usage.................................16
3.2  Stability filter................................................16
3.3  Tare Operation............................................16
3.4  Serial Data Output......................................16
3.4.1  Serial Port 1 (RS-232C).....................16
3.4.2  Serial Port 2 (RS-485)........................17
3.4.3  Continuous Data Formats..................17
3.4.4  BSI Communication...........................18
3.4.5  CHK Checksum..................................22
3.4.6  Modbus...............................................22
3.5  Printer Settings...........................................28
3.6  Test Menu...................................................28
SYSTEM CONFIGURATION AND SETUP.........29
1  ENTERING AND EXITING SETUP.....................30
2  [0__] – INTERFACE PARAMETERS...................31
2.1  [00_] – RS-232C.........................................31
2.1.1  [000 3] – Data Format........................31
2.1.2  [001 3] – Baud Rate...........................31
2.1.3  [003 00] – Address.............................31
2.1.4  [004 0] – Data Length and Parity.......31
2.1.5  [005 0] – Checksum...........................31
2.1.6  [006 1] – Carriage Return...................31
2.1.7  [007 1] – Line Feed............................31
2.1.8  [008 0] – Response Speed.................31
2.2  [01_] – RS-485............................................31
2.2.1  [010 5] – Data Format........................32
2.2.2  [011 3] – Baud Rate...........................32
2.2.3  [013 01] – Address.............................32
2.2.4  [014 0] – Data Length and Parity.......32
2.2.5  [015 0] – Checksum...........................32
2.2.6  [016 1] – Carriage Return...................32
2.2.7  [017 1] – Line Feed............................32
2.2.8  [018 0] – Response Speed.................32
2.3  [04_] – Printer.............................................32
2.3.1  [040 2] – Print Format........................32
2.3.2  [041 1] – CN (Consecutive Ticket 
Number)............................................................32
2.3.3  [042 ] – Minimum for Printing.............32
2.3.4  [043 0] – Print Mode...........................32
2.3.5  [044 XY] – Line Feeds before Printing
..........................................................................32
2.3.6  [045 XY] – Line Feeds after Printing. .33
2.3.7  [046 0] – Form Feed...........................33
2.3.8  [047 3] – Print Margin Spacing...........33
2.3.9  [048 1] – Print Copies.........................33
3  [1__] – CONFIGURATION PARAMETERS.........33
3.1  [11_] – Startup............................................33
3.1.1  [112 1] – Save Tare............................33
3.1.2  [113 0] – Auto Tare Clear...................33
3.1.3  [115 ABCDE] – Key Lock...................33
3.1.4  [116 1] – Function Key Action............33
3.2  [12_] – Filter................................................33
3.2.1  [120 0] – Filter Setting........................33
3.3  [13_] – Digital I/O Port Settings..................33
3.3.1  [137 1] – Output Polarity....................33
3.3.2  [138 n] – I/O Port 1.............................34
3.3.3  [139 n] – I/O Port 2.............................34
3.4  [14_] – Adjustmets......................................34
3.4.1  [142 0] – Label Number (CN).............34
3.4.2  [143 1] – Display Update Rate...........34
4  [2__] – SCALE SETUP PARAMETERS..............34
4.1  [20_] – Setup...............................................34
4.1.1  [200 0] – Metrological Use.................34
4.1.2  [201 0] – Hi-res Reading....................34
4.1.3  [202 0] – Power On Zero....................34
4.1.4  [203 3] – Zero Range.........................34
4.1.5  [204 0] – Auto Zero Track..................34
4.1.6  [205 2] – Tare.....................................34
4.1.7  [206 2] – Motion Detection.................34
4.1.8  [207 0.3] – Stability Period.................35
4.2  [21_] – Weighing, Scale Build.....................35
4.2.1  [210 0] – Weighing Mode...................35
4.2.2  [212] – Capacity/Division...................35
4.2.3  [214] – Unit Displayed........................35
5  [3__] – CALIBRATION PARAMETERS...............35
5.1  [30_] – Calibration.......................................35
5.1.1  [300] – Gravity....................................35
5.1.2  [301] – Calibration..............................35
5.1.3  [302] – Linearity Correction................35
5.2  [31_] – Adjustment......................................36
5.2.1  [310] – Zero Adjustment.....................36
5.2.2  [311] – Span Adjustment....................36
5.2.3  [312] – Span Adjustment Loaded.......36
5.2.4  [313] – vCal........................................37
6  [8__] – METROLOGICAL DATA..........................38
6.1  [80_] – Legal Metrology Records................38
6.1.1  [800] – Calibration Counter................38
7  [9__] – DIAGNOSTIC PARAMETERS.................38
7.1  [90_] – Tests...............................................38
7.1.1  [900] – Key Pad..................................38
7.1.2  [901] – RS-232C Checking................38
7.1.3  [902] – RS-485 Checking...................38
7.1.4  [903] – Digital Inputs..........................38
7.1.5  [904] – Digital Outputs........................38
7.1.6  [905] – Input mV.................................38
7.2  [99_] – Parameter Print...............................38
7.2.1  [990] – Print all Parameters................38
7.2.2  [991] – Reset to Default Parameters..38

CONTENTS

8 TROUBLE SHOOTING.......................................39

8.1 ERRORS.............................................................39

8.2 CALIBRATION TABLE........................................40

8.3 DEFAULT PARAMETER TABLE.........................41

8.4 QUESTIONS AND ANSWERS............................42

9 SECURING BY SEALING...................................43

10 CONFORMITY..................................................44

Always check the PT web site for the most up to date information and revisions

www.ptglobal.com

www.ptglobal.com PT200MB Instruction Manual 1

1 NOTICES

1.1 SAFETY

CAUTION! READ THIS MANUAL BEFORE OPERATING OR SERVICING THIS EQUIPMENT.

FOLLOW THESE INSTRUCTIONS CAREFULLY. SAVE THIS MANUAL FOR FUTURE

REFERENCE. DO NOT ALLOW UNTRAINED PERSONNEL TO OPERATE, CLEAN,

INSPECT, MAINTAIN, SERVICE, OR TAMPER WITH THIS EQUIPMENT. ALWAYS

DISCONNECT THIS EQUIPMENT FROM THE POWER SOURCE BEFORE CLEANING OR

PERFORMING MAINTENANCE. CALL PT LIMITED FOR PARTS, INFORMATION, AND

SERVICE.

WARNING! ONLY PERMIT QUALIFIED PERSONNEL TO SERVICE THIS EQUIPMENT.

EXERCISE CARE WHEN MAKING CHECKS, TESTS AND ADJUSTMENTS THAT MUST BE

MADE WITH POWER ON. FAILING TO OBSERVE THESE PRECAUTIONS CAN RESULT IN

BODILY HARM.

WARNING! FOR CONTINUED PROTECTION AGAINST SHOCK HAZARD CONNECT TO A

PROPERLY GROUNDED OUTLET ONLY. DO NOT REMOVE THE GROUND PIN.

WARNING! DISCONNECT ALL POWER TO THIS UNIT BEFORE REMOVING ANY

CONNECTION, OPENING THE ENCLOSURE OR SERVICING.

WARNING! BEFORE CONNECTING/DISCONNECTING ANY INTERNAL ELECTRONIC

COMPONENTS OR INTERCONNECTING WIRING BETWEEN ELECTRONIC EQUIPMENT

ALWAYS REMOVE POWER AND WAIT AT LEAST THIRTY (30) SECONDS BEFORE ANY

CONNECTIONS OR DISCONNECTIONS ARE MADE. FAILURE TO OBSERVE THESE

PRECAUTIONS COULD RESULT IN DAMAGE TO OR DESTRUCTION OF THE EQUIPMENT

OR BODILY HARM.

CAUTION! OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE

DEVICES.

1.2 PRECAUTIONS

•Before using the instrument, check that the supply voltage is correct. If it is not, do not connect the scale to the

power supply.

•Before energising the instrument, check all connectors are installed properly and all external cables are

installed safely to avoid mechanical damage.

•The scale should only be used under suitable environmental conditions as indicated in this manual.

•Do not use this scale in places where conditions are unstable or there is explosive danger.

•Do not place the scale near heat sources or under direct sunlight where it may heat up.

•Keep the scale as far away from other electromagnetic radiation sources as possible, their influence could

affect the weighing accuracy.

Failure to follow these precautions will void warranty, contact your supplier to clarify any questions.

Rights and Liabilities

This publication may be reproduced in part, stored in a retrieval system, or transmitted in any form or by any means,

mechanical, photocopying, recording, or otherwise, without the prior written permission of PT Limited.

No patent liability is assumed with respect to the use of the information contained herein. While every precaution has

been taken in the preparation of this manual, PT assumes no responsibility for errors or omissions. Neither is any

liability assumed for damages resulting from the use of the information contained herein.

The information herein is believed to be both accurate and reliable. PT, however, would be obliged to be informed if any

errors occur. PT cannot accept any liability for direct or indirect damages resulting from the use of this manual.

PT reserves the right to revise this manual and alter its content without notification at any time.

Neither PT nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or

expenses incurred by purchaser or third parties as a result of: accident, misuse, or abuse of this product or

unauthorized modifications, repairs, or alterations to this product, or failure to strictly comply with PT operating and

maintenance instructions.

PT shall not be liable against any damages or problems arising from the use of any options or any consumable products

in any way other than in accordance with their standard terms and conditions.

NOTE: The contents of this manual are subject to change without notice.

www.ptglobal.com PT200MB Instruction Manual 2

2 DESCRIPTION

2.1 INTRODUCTION

The PT200MB is a smart indicators for industrial weighing process applications offering powerful PLC

integration facilities; standard serial ports such as RS-232C, RS-485 and 2 configurable digital inputs/outputs.

A step up from the PT200WI with a single RS-232C port, the PT200MB with an additional RS-485 port is able

to connect by Modbus for system integration.

Powerful calibration options including vCal, Electronic calibration without test weights, supports fast easy

setup and service. The PT200MB features adaptive filtering for fast settling, high display resolution and a

speed of up to 1600 conversions per second.

It’s small size aluminum body is perfect for panel installations, providing a big display and requiring little

space on control panels.

2.2 MODELS and FEATURES

PT200MB

PT210MB

PT210AN

PT210PB

PT210PN

PT210EN

PT210CO

1 000 to 999 999 display resolution Yes Yes Yes Yes Yes Yes Yes

High internal resolution up to 16 000 000 counts Yes Yes Yes Yes Yes Yes Yes

Up to 1600 conversion per second Yes Yes Yes Yes Yes Yes Yes

Serial interface RS-232C Yes Yes Yes Yes Yes Yes Yes

Serial interface RS-485 Yes Yes Yes Yes Yes Yes Yes

Modbus RTU Yes Yes Yes Yes Yes Yes Yes

Analogue output (4–20, 0–20mA,0–5, 0–10VDC) - - Yes - - - -

PROFIBUS DPV1 interface - - - Yes - - -

PROFINET interface - - - - Yes - -

Ethernet interface - - - - - Yes -

Modbus TCP - - - - - Yes -

CANopen interface - - - - - - Yes

Continuous data output Yes Yes Yes Yes Yes Yes Yes

Fast Continuous data output Yes Yes Yes Yes Yes Yes Yes

BSI data interface Yes Yes Yes Yes Yes Yes Yes

Digital Input (I), relay output (O) - 4I/5O 2I/4O 4I/5O 4I/5O 4I/5O 4I/5O

Non-isolated programmable digital input/output 2 - - - - - -

Error and at zero outputs (non-isolated) - Yes Yes Yes Yes Yes Yes

Bidirectional signal input for force measurement Yes Yes Yes Yes Yes Yes Yes

Unit selection (g, kg, t, lb, klb, N, kN ) Yes Yes Yes Yes Yes Yes Yes

Peak hold function - Yes Yes Yes Yes Yes Yes

Hold function - Yes Yes Yes Yes Yes Yes

Auto-zero tracking and auto-zero at power-up Yes Yes Yes Yes Yes Yes Yes

Motion detection Yes Yes Yes Yes Yes Yes Yes

Adaptive digital filter for faster measuring Yes Yes Yes Yes Yes Yes Yes

Electronic calibration (vCal) without test weights Yes Yes Yes Yes Yes Yes Yes

Electronic calibration (vCal) over field bus Yes Yes Yes Yes Yes Yes Yes

Zeroing and Taring via fieldbus Yes Yes Yes Yes Yes Yes Yes

Zeroing and Taring with BSI commands Yes Yes Yes Yes Yes Yes Yes

Zero and Span calibrations over field bus Yes Yes Yes Yes Yes Yes Yes

Zero adjustment without span change Yes Yes Yes Yes Yes Yes Yes

Span adjustment with test weights Yes Yes Yes Yes Yes Yes Yes

Span adjustment for filled tanks (without unloading) Yes Yes Yes Yes Yes Yes Yes

3 point calibration (linearity correction) Yes Yes Yes Yes Yes Yes Yes

Programming by PT AzCom PC software Yes Yes Yes Yes Yes Yes Yes

8 load cells 350 Ω or 16 load cells 700 Ω Yes Yes Yes Yes Yes Yes Yes

12 to 28 VDC power supply range Yes Yes Yes Yes Yes Yes Yes

Front panel sealing, optimum instalation IP65 IP67 IP67 IP67 IP67 IP67 IP67

www.ptglobal.com PT200MB Instruction Manual 3

2.3 STANDARD SUPPLIED ITEMS

The following are the items supplied as standard. Please check the contents of your package before

installing and advise PT of any discrepancies.

Indicator PT200MB

3-position 3.81mm pitch green plug

for power supply Included

7-position 3.81mm pitch black plug for load cell

cable Included

6-position 3.81mm pitch black plug for RS-232C

and RS-485 Included

2-position 3.81 mm pitch green plug

for non-isolated outputs Included

Mounting hardware Included

2.4 ACCESSORIES SOLD SEPARATELY

The following accessories are available for separate purchase.

•Metrological sealing kit as used on approved scales to prevent tampering or interference.

•RS-232C cable with null modem wiring and 9 pin connector for PC connection.

•RS-232C to USB adapter.

•Load cells, cable and junction boxes are available on the PT web site.

2.5 DEFINITIONS AND CONVENTIONS

ADC:

Analogue to digital converter, converts the analogue signal into a digital signal.

DAC:

Digital to analogue converter, converts the digital signal to an analogue signal, usually after some digital

signal processing.

Dead weight:

Dead weight is the self weight of the platform or scale load carrying structure on the load cells without

the contents or items to be weighed. The output voltage of the load cell in response to the weight of the

platform is usually the zero offset. The zero offset must be within the range of the instrument adjustment

for correct operation.

Live weight :

The weight that is applied to the scale and shown on the indicator.

Excitation voltage:

The voltage that is supplied by the indicator to the load cell.

Load cell:

Load cell is a device that converts force to electronic voltage. A load cell consists of two parts. The first

part is a sensor that can be linearly distorted according to the force applied to it. The second part is the

strain gauge element which changes its resistance according to the distortion of the sensor.

Load cell rated output:

The output voltage from the load cell divided by the excitation voltage at load cell rated capacity. This is

usually expressed in mV/V.

Input range:

The maximum range of input that the device can accept. This is usually stated in mV and for a full load

cell system is calculated from the number of load cells (Lcn), mV/V (LCmv) and capacity (LCcap) and

www.ptglobal.com PT200MB Instruction Manual 4

also the maximum total load (TL) (including dead load) on the load cells and the excitation voltage (EV).

Input Range (mV) = TL / (LCn * LCcap) * LCmv * EV

Note: A summing box with corner adjustment will reduce this value slightly.

FSO:

Full scale output. Errors may be presented as a % of the full output range after calibration.

PLU

Product Look Up. A code to look up values stored in product information

CLU

Counting Look Up. A code to look up values stored for counting

APW

Average product weight. Used in parts counting, this is the average weight of one piece of product,

determined by weighing a sample and dividing by the number of parts.

ALU

Amount Look Up. A code to look up values stored in memory in relation to the amounts (quantity) of

parts in check weighing.

Span Adjustment

Adjust the indicator so that when the load on the scale is changed the scale correctly shows the same

change.

[001]

Numbers shown in square brackets in bold refer to parameters set during configuration.

[ZEro.CA]

Words shown in square brackets in bold refer to prompts shown on the display.

<TARE>

Words shown in angled brackets in bold refer to keys of the keypad. <f>, <G/N>, <TARE>, <ZERO>,

<PRINT>.

EtherX

EtherX is third party software available from the internet to enable setting of IP address parameters in

the indicators with Ethernet.

AzCom

AzCom is software currently in development for communication and configuration of the PT Azure

Series indicators and controllers.

www.ptglobal.com PT200MB Instruction Manual 5

3 SPECIFICATIONS

General common specifications

A/D Converter

A/D converter type 24 bit Delta-Sigma ratiometric with integral analog and digital filters

Conversion Rate Up to 1600 conversions per second.

Input sensitivity 0.4 μV/d (approved); 0.1μV/d (non approved)

Analog input range 0 mV to +18 mV (unipolar weighing); -18mV to +18mV (bidirectional force)

Zero offset adjustment range -18mV to +18mV

Resolution

Display resolution up to 10 000 increments (approved); up to 999 999 increments (industrial)

Internal resolution up to 16 000 000

Non-linearity, temp. coefficient Within 0.0015% FS, < 2 ppm/ºC

Scale Calibration and Functions

Calibration

Span calibration with weights, even without without zero calibration.

vCal for calibration by direct entry of load cell characteristics.

Calibration of span and zero by fieldbus commands. (PT200MB only)

Digital filter 10 step programmable adaptive digital filter.

Weighing functions Tare, zeroing, auto zero track, motion detection, auto-zero at power up.

Other Functions Pre-settable label (print ticket) count number, gross or tare indication.

Load cells

Excitation 5 VDC, 120 mA max.

Number of load cells Up to 8 load cells 350Ω, 16 load cells 700Ω, in parallel.

Load cell connection 4 or 6 wire technique.

Cable length: maximum 1000 m/mm² for 6-wire connection

Communication

RS-232 and modes 1200 to 115200 baud, programmable. Command, continuous, Printer, BSI.

RS-485 and modes

(PT200MB only)

1200 to 115200 baud, programmable. Command continuous, Printer, BSI

output, Modbus RTU. Up to 31 units on the bus.

Response Speed < 4mS response delay from read/write commands.

Printing

Format Programmable 1 line or multi-line, print ticket count number can be preset.

Digital Inputs and Outputs (2 configurable I/O)

Digital Outputs, non-isolated Current source, +supply-1.5V, max. 100mA to 0V

Digital Inputs, non-isolated 12 – 28V DC, common ground, 10mA.

Power Connection

All Models 12 to 28VDC 300mA.

Environment and Enclosure

Operating Environment -15 °C to +55 °C; 85% RH max, non-condensing, Front panel IP65

Enclosure Plastic front panel, aluminium casing, stainless rear. 96mm x 50.5mm panel,

100mm deep. Panel cut-out 92x47mm.

Model specific specifications

PT200MB

Protocol and Data Rate Modbus RTU on RS485. 1200 to 115200 baud, 8N1 / 7O1 / 7E1 / 8O1 / 8E1.

Maximum stations Up to 31 units per segment.

Response Speed < 4mS response delay from read/write commands.

www.ptglobal.com PT200MB Instruction Manual 6
 4  GETTING STARTED
 4.1  THE STEPS BEFORE OPERATION
Warning: Please take note of the steps below required to get your scale operating. Each step refers to 
the appropriate location in the manual.
1.Install load cells into weighing system and connect to a junction box for multiple 
load cells.
2.Connect load cells from the junction box to the indicator.
Take note of the number of wires and follow the wiring instruction for 4 or 6 wire 
connections. 5.3 , p8
3.Connect the indicator to the power supply. 5.4 , P8
4.Check to see if access to settings requires a pass code, a switch to be activated or 
a jumper wire to be installed. 5.6 , P9,  7.1 , p30
5.Configure required settings for communications and I/O ports. 6.3.4 , p16
6.Configure the indicator for the desired weighing range and increment of weight.  
7.4.2 , p35
Note, this is not necessarily the capacity of the load cells, it is good practise to have 
some reserve capacity. For example 4 x 10t load cells may be used for a weighing 
range of 30t.
7.Calibrate the instrument to show zero with an empty scale and  the correct weight 
when loaded (zero and span). There are various methods of calibration, the most 
accurate is generally calibration with a known weight.  7.5 , p35
8.Adjust filter ( 7.3.2.1 , p33) and other settings to suit the operating environment.  
7.4.1 , p34 Make sure high resolution display is not activated in normal weighing.  
7.4.1.2 , p34
9.Check the configuration to confirm calibration and settings are correct and correct 
operation of the scale by placing a known load on the scale.

www.ptglobal.com PT200MB Instruction Manual 7

5 INSTALLATION

5.1 GENERAL RULES

Warning: Please read this manual carefully before installing the instrument. Applying the

recommendations in this section will increase your system reliability and long term performance.

Control Cabinet

The control cabinet should be designed so that PT200MB can operate safely and with highest

performance. The panel should be placed in a clean area, out of direct sun light if possible, with a

temperature between -15 ºC and +55 ºC and humidity not exceeding 85%RH, non-condensing. All

external cables should be installed securely to avoid mechanical damage.

PT200MB instruments are very low level signal measuring instruments. To avoid electrical noise they

should be separated from any equipment that produces electrical noise.

•It is preferable to use metal cabinets to protect against radio frequency interference and ensure

the cabinet is connected to ground.

•Load cell cable trays must be separated from others, if possible, as power or motor control

cables can cause interference.

•If there is noise-generating equipment, such as heavy load switches, motor control equipment,

inductive loads etc., please take care to protect against EMC interference in the cabinet and if

necessary protect PT200MB instruments with a Faraday cage or install them well separated or

in a separate section well away from this kind of equipment.

•Connect parallel reverse diodes to the DC inductive loads like relays, solenoids etc. to minimize

voltage peaks on the DC power supply.

•If the condition of your plant electrical supply fluctuates or is subject to noise and interference,

prepare a special power line and grounding.

•Good quality grounding of the instruments will improve weighing accuracy and the safety of

your indicator.

Cabling

All cables coming to the control cabinet should be shielded. Please use separate cable trays for these

low signal level cables. The distance from load cell cables, interface cables and DC power supply

cables to mains power line cables must be minimum 50 cm unless they are installed in a properly

grounded steel conduit or you could experience a reduction in performance.

Warning: Please always remember that PT200MB instruments are very low voltage measuring

instruments. Your control cabinet design and proper installation increases reliability and performance of

the instrument. Please do not forget that the instrument must be powered off before inserting or

removing any peripheral connector.

5.2 MECHANICAL INSTALLATION

The PT200MB indicators are panel mounted from the front with stainless steel front and back parts, and

aluminium body. Dimensions are shown with 1/8 DIN type cut out below.

92 mm (3.62")

47 mm

(1.85")

www.ptglobal.com PT200MB Instruction Manual 8

5.2.1 CONNECTIONS

Connections are made with connectors to the rear panel, as shown below. Allow adequate clearance

for connectors and cable.

PT200MB rear panel

Install the indicator into the panel from the front with the panel fixing accessories supplied. Be sure to

complete the mechanical installation of your weighing system and the panel installation is finalised to

ensure the best life before starting the electrical installation as described below.

5.3 CONNECTING THE LOAD CELL

Warning: After load cell connection to the instrument, welding on the mechanical structure or fittings is

not recommended. Disconnect all connectors from the indicator before any welding on the mechanical

hardware.

The load cell wiring should be installed carefully before energising to avoid damage to the instrument

and load cells. The combined input resistance of the load cells that you want to connect should be more

than 42Ω. Do not bind the load cell cables together with other cables as it could result in cross-talk

interference. Please also keep them well away from the AC power cables.

4 wire LC connection 6 wire LC connection

Load cell (LC) connection details are shown above. In 4-wire installations the sense and excitation pins

with the same polarity should be connected together in the connector (connect Sense+ to Excitation+,

Sense- to Excitation-). If you have a junction box in your system, use 6 wire cable between the

instrument and the junction box, and for 4 wire load cells connect Sense and Excitation in the junction

box for better performance.

Warning: Always connect Sense pins to Excitation pins for 4 wire connection. Non-connected sense

pins may cause the wrong Excitation voltage measurement and create an accuracy problem.

Warning: Connect the load cell cable shield to the reference ground or shield pin of the load cell

connector.

5.4 POWER SUPPLY AND GROUNDING

The weighing instrument measures very low signal levels. The quality of the power supply and

grounding will affect the accuracy and the safety of your measuring system. It is very important that the

instrument should not share power lines with noise-generating parts such as heavy load switching

relays, motor control equipment, inductive loads, etc. If the condition of the mains power supply in the

plant is poor, install a special mains power line and grounding.

The power supply voltage of the instrument shall be between 12 VDC and 28 VDC. The connection of

power supply to the 24 VDC power supply connector located right - bottom of the instrument is shown

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below. Be sure, the power supply is switched of before connection.

Warning: Before modifying the instrument, turn the power off and wait at least for 30 seconds.

Warning: Connect the power supply grounding pin to the reference ground.

5.5 ENERGISING THE INSTRUMENT

Check the mechanical installation, grounding, load cell connection and power supply connection to be

sure correct electrical installation has been completed before energising the instrument. If all previous

steps have been completed properly, energise the instrument.

5.6 CONFIGURING AND CALIBRATION

Before using the scale it must be configured (programmed) to display the correct capacity and

increment and have a number of advanced functions configured in 7 SYSTEM CONFIGURATION

AND SETUP. The scale must also be calibrated to display the weight correctly as detailed in 7.5 [3__]

– CALIBRATION PARAMETERS.

Warning: If the scale has been sealed, call a person with authorisation before modifying the scale or

settings.

To access configuration and calibration settings there is a DIP switch on PT200MB rear panel between

the load cell connector and the non-isolated output connector. It is set deep inside the casing and

should be set to position 2 (ON (downward) to change the metrological related parameters including

calibration. THE HOUSING DOES NOT NEED TO BE OPENED.

5.6.1 PROGRAMMING

Program the instrument according to the needs of your application in this step.

•Set interface parameters in block [00-] ( 7.2.1 ), RS232 and RS485 serial ports in [01-] ( 7.2.2 ).

•Set configuration parameters in block [1--] ( 7.3 ) for scale functions related with the application

like saving tare before power off and restart in Net mode and digital I/O related entries.

•Parameters to set up the scale such as zeroing range are in block [2--] ( 7.4 ). Please

remember these parameter values are restricted for scale usage in trade. The scale capacity

and division values are also entered in this block.

•If you will be connecting any peripheral devices to the instrument, you have to set the related

parameters in the PT200MB. Refer to ( 7.3.3 ) for digital input/output and ( 7.2 ) for fieldbus

interfacing.

Warning: The programming and parameter descriptions are referred to later. We recommend you save

Load cell Grounding and protection Power Supply Connection

Location of configuration DIP switch

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these parameters before the next step in case the settings are lost if calibration fails due to an error.

5.6.2 CALIBRATION

You will need to calibrate the scale after programming the parameters. You may follow one the

calibration methods below.

•vCal Electronic calibration without calibration weights. This can be from the key pad or via

AzCom or Modbus.

•Full calibration via keys on the instrument by using calibration weights. ( 7.5.1 ).

•Zero adjustment and span adjustment in sequence via keys or fieldbus. Span calibration

requires a calibration weight unless performed with vCal. You may save just the zero calibration

if required without continuing to span adjustment.( 7.5.2.1 ).

•Zero adjustment and span adjustment under load, performed in sequence via keys, if the scale

cannot be emptied when span adjustment is required. Calibration weights are required for span

calibration. ( 7.5.2.3 ).

You can access the calibration menu from the operation menu by following the description in the “Fast

access to calibration” section ( 7.1 ). After calibration and after saving the adjustment return to the

operating menu ( 7.1 )

Remember: You may use parameter [905] 7.7.1.6 to monitor the load cell output voltage during

loading for diagnostic purposes if you can not perform the calibration due to errors.

5.6.3 LOCKING CALIBRATION

If the DIP switch has been set to the downward position (ON) for programming, push it to the upward

position to lock the scale adjustment against access by non-authorised persons. If the scale is used in

non-trade industrial weighing, this step is not essential, but is recommended.

5.7 CHECKING SCALE PERFORMANCE

Warning:

•Scale set-up and calibration should be performed according to the needs of your application.

Please read this document carefully and select the parameter values which will fit your

application before programming the instrument.

•You cannot change Set-up parameter values and calibration after sealing the instrument in

legal usage, be sure the proper adjustments have been done before sealing the scale.

Check the scale performance by testing the scale eccentricity, scale linearity with loading up to the

maximum loading value, repeatability, etc. before putting the scale into use.

5.8 RS-232C PORT CONNECTION

RS 232C port usage and specifications are shown in the table below. Refer to 6.3.4 Serial Data

Output of the manual to set up this interface.

Usage Interfacing with a Printer, PC, PLC or remote display

connection. Connection to AzCom Software.

Data formats

Continuous, Fast Continuous, Printer Format, BSI Protocol,

Modbus-RTU High-Low, Modbus-RTU Low-High

You will find the data format details in 6.3.4.3 ([000])

Baud rate 1200 to 115200 bps, 9600 (Default) ([001])

Length and parity 8 bits no parity (Default), 8Odd, 8Even, 7Odd, 7Even ([004])

Start / Stop bits 1 start bit and 1 stop bit

Table 1: RS-232C Serial Interface Specifications

The connection to the indicator RS-232 port is made as below. Connection to external equipment can

be either 2 wire for transmitting data only to a printer, PC or remote display or 3 wire for conversational

transmission where it is necessary to send the indicator commands or set up information.

Illustration 1: 2 wire Connection with a printer

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Illustration 2: 3 wire connection to a PC

Note: Connecting the shield to the reference ground will protect your weighing system against EMC

disturbances.

5.9 RS-485 AND Modbus CONNECTION

RS-485 port usage and specifications are shown in the table below. Refer to 6.3.4.2 of the manual to

set up this interface.

Usage Interfacing with a Printer, PC, PLC or remote display

connection. Programming with AzCom software.

Data formats

Continuous, Fast Continuous, Printer Format, BSI Protocol,

Modbus-RTU High-Low, Modbus-RTU Low-High

You will find the data format details in 6.3.4.3 ([010])

Baud rate 1200 to 115200 bps, 9600 (Default) ([011])

Length and parity 8 bits no parity (Default), 8Odd, 8Even, 7Odd, 7Even ([014])

Start / Stop bits 1 start bit and 1 stop bit

Table 2: RS-485 Serial Interface Specifications

The RS-485 serial connection is made with three wires as indicated below. Line termination resistors 0f

110 ohms are needed both ends of the RS 485 line.

Note: Connecting the shield to the reference ground will protect your weighing system against EMC

disturbances.

Note: Disconnect AzCom PC software before starting Modbus-RTU interfacing.

Note: For longer transmission distances or noisy environments connection to remote displays and

process controllers with shielded twisted pairs as below is recommended.

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5.10 DIGITAL INPUT CONNECTION

PT200MB digital I/O (inputs/outputs) are independently programmable as inputs for zeroing, taring,

clearing and as a fieldbus I/O port for the PT210MBMB. The port status can be transferred to the PLC

by fieldbus command.

Inputs are non-isolated, +12~+28 VDC relative to power supply 0V,10 mA. Input connection is as below.

The diagram below shows the functional operation of the inputs.

Zero or Tare functions

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5.11 DIGITAL OUTPUT CONNECTION

PT200MB digital I/O outputs can be configured as setpoints. Digital outputs of the PT200MB are also

programmable with the setpoint value by fieldbus commands. Refer to parameter [137] 7.3.3.1 , [138]

7.3.3.2 and [139] 7.3.3.3 .

Digital output ports are common ground, current source, (+power supply-1.5)V, max. 100mA to power

supply 0V. Use relays to switch higher voltage or current loads.

5.12 SETPOINTS

The digital outputs can be set as setpoints with the parameters above by setting a value that is less

than 999999. Be sure to set the mode required as shown below.

A long press of the <G/N> key will provide quick access to the setpoint parameters.

Setpoints can also be set remotely with BSI or Modbus commands.

The diagrams in the table below show the functional operation of the different modes.

Standard Output:

Only one set point value is entered.

The output state is forced active high

(ON) when the weight is higher than

SP1, otherwise the output is passive

(OFF).

Refer to parameter [130] 7.3.3.1 .

Inverted output:

Only one set point value is entered.

The output state is passive (OFF) when

the weight is higher than SP1,

otherwise the output is forced active

high (ON).

Refer to parameter [130] 7.3.3.1 .

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6 OPERATION

Once you have familiarised yourself with the keypad and display you will find operation and set up quite

straight forward.

6.1 KEYPAD AND DISPLAY

This small indicator has a clear LED display and positive action keys for easy operation. The weight

display is displayed with up to 6 digits 13.5mm in height. There are LED annunciators to indicate

Net/Gross Zero, Motion and Units

Keys and their functions for the PT200MB weighing indicators are below.

Function key: Press to activate the assigned function. The key function is programmable for

Increased resolution indication, Total, Tare value indication and CN value indication with

parameter [116] 7.3.1.4 .

During configuration this key exits the current block and confirms exit without saving.

G/N, Setpoint key: Pressing this key temporarily shows the Gross weight. A long press of this

key enters the set point parameters.

During configuration this key moves to the next parameter menu item.

Tare / Clear key: Press this key to tare the scale and deduct the weight of the container placed

on the platform so as to see the net weight value of the material subsequently added into or

taken out of the container. A long press of this key clears the tare setting.

During configuration this key moves to the next digit to change, shown blinking.

Zero key: This key adjusts the scale zero when in Gross mode. If there is any residual weight or

drift. Zeroing should be done without any load on the platform.

During configuration this key changes the parameter selection or flashing digit to be changed.

Print key: By pressing this key weight data and other information (depending on the setup

parameters) can be sent to a printer or a PC via serial port.

During configuration this key acts as an enter key to accept a selection and advance.

The PT200MB has the ability to lock the keys to avoid access by unauthorised persons. The key(s)

which would be locked are programmed with parameter [115] 7.3.1.3 .

You can activate or deactivate this function by a long press of the <F> key, press the <TARE> key and

<PRINT> keys sequentially. The prompt [Lock] appears for a short while to indicate the pressed key is

locked.

An explanation of the annunciators seen on the display is below.

Motion: This sign appears if the load on the scale is not stable. The weight value of the object

should be read if the scale is stable. Taring, zeroing, printing and accumulation are not available

when the scale is unstable.

Center of zero: This sign appears if the weight is within the center of the zero band.

Weight unit: The weighing unit is located on the right of the weighing display as kg, g, lb, klb, N,

kN.

Net

Net weight: This sign indicates that the weight value is the net weight.

Gross

Gross weight: This sign indicates the displayed weight value is the gross weight.

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 6.2  BASIC WEIGHING
After the power is energised the indicator activates the display within few seconds then the indicator 
firmware name and version are displayed before display testing.  After the start up cycle, the weight 
value is displayed.  An [E E E] prompt at power on indicates the zeroing range at power on has been 
exceeded or the scale was not unloaded at power on. Possibly the indicator parameters have also not 
been configured. The scale should be unloaded before power on ( 8  TROUBLE SHOOTING).
Place the object you want to weigh on the scale. The correct weight of the object is shown on the 
display after the ~ symbol has gone out. 
 6.2.1  Zeroing
Zeroing is performed to compensate for deviations from zero of the unloaded scale. Sometimes there 
can be some small build up of material or drifting out of the automatic zero band.
•Clean the unloaded platform and check if there is anything touching the platform.
•Press the [ZERO] key to compensate for the zero deviation. Zeroing can be performed if the 
scale is stable and within the zero setting range. 
•The >0<  sign appears to indicate that zeroing is complete and the scale is at center of zero.
•If zeroing is has not succeeded, wait for the ~ sign to disappear and press the [ZERO] key 
again. If there is continuous motion, adjust the filter setting to obtain a stable reading and  press 
the [ZERO] key again
 6.2.2  Taring
Taring is performed to deduct the initial weight of a container and its contents and to just display the net 
weight added into the container or unloaded from the container. The PT200MB is programmable for 3 
types of tare function: Single tare, Multi-tare, Tare/Clear, see ( 7.3.1.2 ,  7.4.1.6 ) or disabled. 
Warning: The tare value cannot exceed the maximum scale capacity. The maximum amount that can 
be weighed in NET mode is the difference between the tare weight and the maximum scale capacity. 
Capacity in Net = Maximum scale capacity – Tare weight.
 6.2.2.1  Multi-taring
•Place the container on the platform and press the [TARE] key. 
•The display value is zeroed and the NET (net weight) symbol appears. 
•Place the material in to the container and read the net weight of the material you added. 
◦Alternatively you can press [TARE] above after placing a container of material on to the 
scale. You can remove material from the container and the scale shows how much material 
has been taken out.
•The tare value is used until either a new tare is set by pressing the [TARE] key or it is cleared 
after unloading the scale or zeroing the scale.
 6.2.2.2  Tare/Clear
•Place the container on the platform and press the [TARE] key. 
•The display is zeroed and the NET (net weight) symbol appears. 
•Place the material into the container (or remove it as explained above) and read the net weight.
•Press the [TARE] key to clear the tare. Or press the [ZERO] key after unloading the scale.
 6.2.3  Gross/Net Function
You can use the Gross/Net function at any time to temporarily switch the display between the net and 
gross weight with the [G/N] key. After the [G/N] key is pressed, the display shows the gross weight for 
a few seconds and then automatically goes back to the net weight indication. 
 6.2.4  Printing
You can connect your indicator to a printer as indicated in Illustration 1:2 wire Connection with a printer 
and then set serial data output related parameters and printer parameters ([040]  7.2.3.1  to select the 
printout ticket format from the table below. Press the [PRINT] key to print the ticket after loading when 
the indication is stable. As you see in this table, the printouts contain different data depending on the 
operating mode as configured in  7.2.3.1  .
Single line printout. 
CN:    21   G:    3.000kg   T:    1.000kg   N:    2.000kg
CN GROSS TARE NET
M
S
D
L
S
D
S
P
M
S
D
L
S
D
S
P
M
S
D
L
S
D
S
P
M
S
D
L
S
D
L
F
C
R
9 3 13 3 13 3 13 1 1

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Multi-line printouts
In a similar way you can print to a PC with a connection as shown in Illustration 1: 2 wire Connection 
with a printer p10.
 6.2.5  Totalising Weights
You may wish to total a number of weighings. Pressing the <PRINT> key will add the current weight to 
the total in memory. Set the <f> key to display the total ( 7.3.1.4 ).
To clear the weight total, you need to press the <TARE> key while the total value is seen on the 
display. [All C] will appear on the display, you can confirm deletion by pressing the <PRINT> key or 
cancel by pressing the <f> key.
 6.3  ADVANCED USER FUNCTIONS
Please refer to  6.1  KEYPAD AND DISPLAY for the keypad button functions. There are a number of 
more advanced functions available to the user that do not affect the metrological aspects of the 
PT200MB and may be accessed, such as tare settings, assignment of the function key, filter settings, 
print ticket number (CN), display rate, I/O and serial port and print settings. Be sure to save any 
changes by pressing <PRINT> when you exit. 
 6.3.1  f Function Key Usage
The <f> function key can be programmed to provide direct access to various functions.  Enter 
configuration ( 7.1 ) and use the <G/N> and <TARE> keys to access parameter block [116] ( 7.3.1.4 ). 
The options for the function key are listed below.
0 = no action 1 = Hi-res display 2 = Display Total
3 = show tare value 4 = show CN value
 6.3.2  Stability filter
You can change the digital filtering with this parameter to compensate for the influence on the scale of 
vibration or motion in the environment or to increase performance or for faster response.  Enter 
configuration ( 7.1 ) and use the <G/N> and <TARE> keys to access parameter block [120] ( 7.3.2.1 ). 
The filter value can be selected from a number n =  0 to 9 (7 is a good starting point in normal weighing 
applications). As you enter this parameter and press the <PRINT>  key while [120 n] is seen on the 
display, the weight and filtering action can be seen on the display. The value of the filter can be 
changed by using  <G/N> key and the weight variation for each filter value can be seen on the display. 
After finishing the filter selection you can go to next step by pressing the <f> key. 
 6.3.3  Tare Operation
The PT200MB can have the tare function programmed to operate in 4 different modes with the tare key. 
Enter configuration ( 7.1 ) and use the <G/N> and <TARE> keys to access parameter blocks to make 
the settings below.
[112] ( 7.3.1.1 ) Tare Saved
0 = tare value is not saved 1 = tare value is saved on power off
[113] ( 7.3.2.1 ) Auto Tare Clear
0 = tare value is not cleared 1 = tare value is cleared after unloading**
**Note: This implies a change back to Gross mode.
Tare mode [205] ( 7.4.1.6 ) requires metrological access.
 6.3.4  Serial Data Output
Serial data output, including printing, is controlled in the interface menus [00_] ( 7.2.1 ), [01_] ( 7.2.2 ) 
and [04_] ( 7.2.3 ). The choice of settings is very comprehensive.
 6.3.4.1  Serial Port 1 (RS-232C)
The RS-232C port is industry standard connecting easily to most PCs and ideal for shorter distances 
and configuration.
Enter configuration ( 7.1 ) and use the <G/N> and <TARE> keys to access parameter blocks to make 
Multi Line-1Format Multi Line-2 Format

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the settings below.

Set data format or mode from no data transfer, continuous data output, print mode, BSI command

mode, Fast continuous mode and for the PT200MB Modbus RTU High-Low, Modbus RTU Low-High.

Set baud rate, address, data bits and parity, checksum, carriage return, line feed and response speed.

6.3.4.2 Serial Port 2 (RS-485)

Available on the PT200MB, the RS-485 interface is best suited for longer transmission distances, multi-

device networks and higher speeds in noisy environments.

Enter configuration ( 7.1 ) and use the <G/N> and <TARE> keys to access parameter blocks to make

the settings below.

Set data format or mode from no data transfer, continuous data output, print mode, BSI command

mode, Modbus RTU High-Low, Modbus RTU Low-High, Fast continuous mode.

Set baud rate, address, data bits and parity, checksum, carriage return, line feed and response speed.

6.3.4.3 Continuous Data Formats

Continuous data output from the instrument is transmitted in the following data structures. There are 2

options for continuous output. Continuous output and fast continuous output.

Note: CR (Carriage return) and LF (Line feed) codes can be enabled or disabled from the response in

interface port settings [00-], 7.2.1 [01-] 7.2.2 but they must be sent to the PT200MB at the end of

ASCII (BSI) commands.

Continuous Data Format

Continuous data output of the PT200MB is transmitted in the following data structure. The serial ports of

the PT200MB are suitable for bi-directional communication. If, you transmit ASCII codes for the P(print),

Z(zero), T(tare) or C(clear) letters to the serial port of the PT200MB the indicator will act as if the related

keys had been pressed.

CHK (Checksum) can be enabled or disabled from both command and response and only continuous

data output can be programmed for more than one interface.

Status Displayed Weight Tare

STX STA STB STC D5 D4 D3 D2 D1 D0 D5 D4 D3 D2 D1 D0 CR LF CHK

Following is the definition table for status bytes STA, STB and STC;

Definition Table for Status A (STA) Definition Table for Status B (STB)

Bits 0, 1 and 2 Bits 3 and 4 Bits

5,6 Bit 7 Bit 0 Bit 1 Bit 2 Bit 3 Bits

4,5 Bit 6 Bit 7

012Decimal

point 3 4 Inc.

size

Always 1

1= Net

1= Weight

negative

1= Error

1= Unstable

Always = 1

1=Zeroed

with power

0 0 0 XXXX00 1 0 X 1

1 0 0 XXXXX0 0 1 X 2

0 1 0 XXXXXX 1 1 X 5

1 1 0 XXXXX.X

0 = Gross

0 = Weight

positive

0 = No Error

0 = Stable

0 = Not

zeroed with

power on

on zeroed

0 0 1 XXXX.XX

1 0 1 XXX.XXX

0 1 1 XX.XXXX

1 1 1 X.XXXXX

Status C (STC) is always hex ‘30’.

CHK (Checksum) = 0 – (STX+STATUS A+...+LF)

Note: The weight data is represented right aligned and the following error messages (UNDER, OVER,

L-VOLT, H-VOLT and A.OUT) are represented left aligned in the Displayed Weight field.

Fast Continuous Data Format

Fast continuous “indicated weight” data output can be used only for receiving instruments that can

communicate fast. There is no flow control if the device cannot keep up with the data flow. The output

rate is related to the baud rate. Use higher baud rate for faster data rate. If ASCII codes are received by

the PT200MB for the P(print), Z(zero), T(tare) or C(clear) letters, the indicator will act as if the related

keys had been pressed. CR and LF can be enabled in the related parameters.

The data format of the fast continuous data output is;

[STX][STATUS][SIGN][DISPLAYED WEIGHT VALUE][CR][LF]

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