ProSoft Technology 5102-DNPM-MCM3 Owner's manual

MCM

ProLinx Gateway

Modbus Master/Slave

10/16/2009

DRIVER MANUAL

Important Installation Instructions

Power, Input, and Output (I/O) wiring must be in accordance with Class I, Division 2 wiring methods, Article 501-

4 (b) of the National Electrical Code, NFPA 70 for installation in the U.S., or as specified in Section 18-1J2 of the

Canadian Electrical Code for installations in Canada, and in accordance with the authority having jurisdiction.

The following warnings must be heeded:

A WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY

FOR CLASS I, DIV. 2;

B WARNING - EXPLOSION HAZARD - WHEN IN HAZARDOUS LOCATIONS, TURN OFF POWER BEFORE

REPLACING OR WIRING MODULES

C WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN

SWITCHED OFF OR THE AREA IS KNOWN TO BE NONHAZARDOUS.

D THIS DEVICE SHALL BE POWERED BY CLASS 2 OUTPUTS ONLY.

All ProLinx

®

Products

WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN

SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.

AVERTISSEMENT – RISQUE D'EXPLOSION – AVANT DE DÉCONNECTER L'EQUIPMENT, COUPER LE

COURANT OU S'ASSURER QUE L'EMPLACEMENT EST DÉSIGNÉ NON DANGEREUX.

Markings

UL/cUL ISA 12.12.01 Class I, Div 2 Groups A, B, C, D

cUL C22.2 No. 213-M1987

243333 183151

CL I Div 2 GPs A, B, C, D

Temp Code T5

II 3 G

Ex nA nL IIC T5 X

0° C <= Ta <= 60° C

II – Equipment intended for above ground use (not for use in mines).

3 – Category 3 equipment, investigated for normal operation only.

G – Equipment protected against explosive gasses.

ProLinx Gateways with Ethernet Ports

Series C ProLinx™ Gateways with Ethernet ports do NOT include the HTML Web Server. The HTML Web

Server must be ordered as an option. This option requires a factory-installed hardware addition. The HTML Web

Server now supports:

 8 MB file storage for HTML files and associated graphics files (previously limited to 384K)

 32K maximum HTML page size (previously limited to 16K)

To upgrade a previously purchased Series C model:

Contact your ProSoft Technology distributor to order the upgrade and obtain a Returned Merchandise

Authorization (RMA) to return the unit to ProSoft Technology.

To Order a ProLinx Plus gateway with the -WEB option:

Add -WEB to the standard ProLinx part number. For example, 5201-MNET-MCM-WEB.

Your Feedback Please

We always want you to feel that you made the right decision to use our products. If you have suggestions,

comments, compliments or complaints about the product, documentation, or support, please write or call us.

ProSoft Technology

5201 Truxtun Ave., 3rd Floor

Bakersfield, CA 93309

+1 (661) 716-5100

+1 (661) 716-5101 (Fax)

www.prosoft-technology.com

support@prosoft-technology.com

MCM Driver Manual

10/16/2009

ProSoft Technology

®

, ProLinx

®

, inRAx

®

, ProTalk

®

, and RadioLinx

®

are Registered Trademarks of ProSoft

Technology, Inc. All other brand or product names are or may be trademarks of, and are used to identify

products and services of, their respective owners.

ProSoft Technology

®

Product Documentation

In an effort to conserve paper, ProSoft Technology no longer includes printed manuals with our product

shipments. User Manuals, Datasheets, Sample Ladder Files, and Configuration Files are provided on the

enclosed CD-ROM, and are available at no charge from our web site: www.prosoft-technology.com

Printed documentation is available for purchase. Contact ProSoft Technology for pricing and availability.

North America: +1.661.716.5100

Asia Pacific: +603.7724.2080

Europe, Middle East, Africa: +33 (0) 5.3436.87.20

Latin America: +1.281.298.9109

Contents

Important Installation Instructions...................................................................................................2

Your Feedback Please...................................................................................................................3

ProSoft Technology

®

Product Documentation................................................................................3

1 Start Here 7

1.1 System Requirements...........................................................................................7

1.2 Package Contents.................................................................................................8

1.3 Mounting the gateway on the DIN-rail....................................................................9

1.4 Connecting Power to the Unit................................................................................9

1.5 Install ProSoft Configuration Builder Software ..................................................... 10

1.6 Using PCB Help..................................................................................................10

2 Functional Overview 11

2.1 Modbus Master/Slave Port(s)..............................................................................11

2.2 Serial Port Specifications....................................................................................12

2.3 Modbus Master/Slave Port Specifications............................................................13

2.4 Module Internal Database...................................................................................14

3 MCM Protocol Configuration 17

3.1 [Modbus Port x]...................................................................................................18

3.2 [Modbus Port X Commands] ...............................................................................27

4 Serial Port Modbus Error and Status Data 33

4.1 Viewing Error and Status Data ............................................................................33

4.2 Modbus Error and Status Data Area Addresses ..................................................34

4.3 Error Codes ........................................................................................................39

5 Communication Port Cables 41

5.1 Port 0, 1, 2, 3: RS-232 - Null Modem (DTE with Hardware Handshaking) ............42

5.2 Port 0, 1, 2, 3: RS-232 - Null Modem (DTE without Hardware Handshaking) .......42

5.3 Port 0, 1, 2, 3: RS-232 - DTE to DCE Modem Connection...................................43

5.4 Port 0, 1, 2, 3: RS-422 Interface Connections......................................................43

5.5 Port 0, 1, 2, 3: RS-485 Interface Connections......................................................44

6 LED Indicators 45

6.1 Common gateway LEDs......................................................................................45

6.2 LEDs for Serial Ports...........................................................................................46

7 Modbus Port Expander (4102/5102-MBS3-MBM) 47

7.1 [Modbus Master Port]..........................................................................................47

7.2 [Modbus Slave Port x].........................................................................................51

8 Reference 57

8.1 Modbus Protocol Specification............................................................................ 57

8.2 Moving Data using the Data Map........................................................................ 70

9 Support, Service & Warranty 71

9.1 How to Contact Us: Technical Support................................................................ 71

9.2 Return Material Authorization (RMA) Policies and Conditions.............................. 72

9.3 LIMITED WARRANTY........................................................................................ 73

Index 79

Start Here MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 7 of 80

October 16, 2009

1 Start Here

In This Chapter

 System Requirements..........................................................................7

 Package Contents...............................................................................8

 Mounting the gateway on the DIN-rail...................................................9

 Connecting Power to the Unit...............................................................9

 Install ProSoft Configuration Builder Software.....................................10

1.1 System Requirements

The configuration software for the MCM gateway requires the following minimum

hardware and software components:

 Pentium

®

II 450 MHz minimum. Pentium III 733 MHz (or better)

recommended

 Supported operating systems:

o Microsoft Windows Vista

o Microsoft Windows XP Professional with Service Pack 1 or 2

o Microsoft Windows 2000 Professional with Service Pack 1, 2, or 3

o Microsoft Windows Server 2003

 128 Mbytes of RAM minimum, 256 Mbytes of RAM recommended

 100 Mbytes of free hard disk space (or more based on application

requirements)

 256-color VGA graphics adapter, 800 x 600 minimum resolution (True Color

1024 × 768 recommended)

 CD-ROM drive

MCM ♦ ProLinx Gateway Start Here

Modbus Master/Slave Driver Manual

Page 8 of 80 ProSoft Technology, Inc.

October 16, 2009

1.2 Package Contents

The following components are included with your MCM gateway, and are all

required for installation and configuration.

Important: Before beginning the installation, please verify that all of the following items are

present.

Qty. Part Name Part Number Part Description

1 MCM

gateway

PLX-#### ProLinx communication gateway gateway

1 Cable Cable #15, RS232

Null Modem

For RS232 Connection from a PC to the CFG Port

of the gateway

Varies Cable Cable #9, Mini-DIN8

to DB9 Male

Adapter

For DB9 Connection to gateway’s Port. One DIN to

DB-9M cable included per configurable serial port,

plus one for gateway configuration

Varies Adapter 1454-9F Adapters, DB9 Female to Screw Terminal. For

RS422 or RS485 Connections to each serial

application port of the gateway

1 ProSoft

Solutions CD

Contains sample programs, utilities and

documentation for the MCM gateway.

If any of these components are missing, please contact ProSoft Technology

Support for replacements.

Start Here MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 9 of 80

October 16, 2009

1.3 Mounting the gateway on the DIN-rail

ProLinx 5000/6000 Series gateway

1.4 Connecting Power to the Unit

WARNING: Ensure that you do not reverse polarity when applying power to the gateway. This will

cause damage to the gateway’s power supply.

MCM ♦ ProLinx Gateway Start Here

Modbus Master/Slave Driver Manual

Page 10 of 80 ProSoft Technology, Inc.

October 16, 2009

1.5 Install ProSoft Configuration Builder Software

You must install the ProSoft Configuration Builder (PCB) software in order to

configure the gateway. You can always get the newest version of ProSoft

Configuration Builder from the ProSoft Technology web site.

To install ProSoft Configuration Builder from the ProSoft Web Site

1 Open your web browser and navigate to http://www.prosoft-

technology.com/pcb

2 Click the D

OWNLOAD HERE link to download the latest version of ProSoft

Configuration Builder.

3 Choose "S

AVE" or "SAVE FILE" when prompted.

4 Save the file to your Windows Desktop, so that you can find it easily when

you have finished downloading.

5 When the download is complete, locate and open the file, and then follow the

instructions on your screen to install the program.

If you do not have access to the Internet, you can install ProSoft Configuration

Builder from the ProSoft Solutions CD-ROM, included in the package with your

gateway.

To install ProSoft Configuration Builder from the Product CD-ROM

1 Insert the ProSoft Solutions Product CD-ROM into the CD-ROM drive of your

PC. Wait for the startup screen to appear.

2 On the startup screen, click P

RODUCT DOCUMENTATION. This action opens a

Windows Explorer file tree window.

3 Click to open the U

TILITIES folder. This folder contains all of the applications

and files you will need to set up and configure your gateway.

4 Double-click the S

ETUPCONFIGURATIONTOOL folder, double-click the

"PCB_*.

EXE" file and follow the instructions on your screen to install the

software on your PC. The information represented by the "*" character in the

file name is the PCB version number and, therefore, subject to change as

new versions of PCB are released.

Note: Many of the configuration and maintenance procedures use files and other utilities on the

CD-ROM. You may wish to copy the files from the Utilities folder on the CD-ROM to a convenient

location on your hard drive.

1.6 Using PCB Help

Most of the information needed to help you use is provided in a Help System

that is always available whenever you are running . The Help System does not

require an Internet connection.

To view the help pages, start , open the H

ELP menu, and then choose CONTENTS.

Functional Overview MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 11 of 80

October 16, 2009

2 Functional Overview

In This Chapter

 Modbus Master/Slave Port(s).............................................................11

 Serial Port Specifications...................................................................12

 Modbus Master/Slave Port Specifications...........................................13

 Module Internal Database..................................................................14

The Modbus Master/Slave protocol driver may exist in a single port (MCM) or a

multiple port (MCM4) implementation. In either case, each port can be

independently configured as a Master or Slave port to interface, as required, with

other Modbus devices.

2.1 Modbus Master/Slave Port(s)

The Modbus Master ports can be used to continuously interface with Modbus

slave devices over a serial communication interface (RS-232, RS-422 or RS-

485). Each Master port may have up to 100 user defined commands which

determine the Modbus read/write messages issued to each slave attached to the

port.

In addition, the gateway can be configured to poll slave devices that are not

responding to commands at a lower priority (slow-poll mode). If a slave device

has failed to respond to a command after a user-defined number of retries, the

driver will recognize the slave is experiencing a communication failure. In this

case, if you have set a non-zero value in the Error Delay Count parameter in the

Master port configuration, then, as the driver comes to a command on the Master

Command List that should be sent to the failing slave, instead of sending the

command, the driver will skip the command and decrement the error delay

counter value by one.

When the number of commands have been skipped is equal to the value set in

the Error Delay Count parameter, the error delay counter will have been

decremented go zero and the driver will send next command for that node in the

command list. If the slave responds properly to this command, the driver will

resume normal polling of this slave. If the new command fails, the driver will

continue to recognize the slave is experiencing communication problems and

repeat the process of skipping commands and decrementing the error delay

counter before trying to send another command to that slave. This has the effect

of putting the slave in a low-priority, slow-poll mode until it begins to

communicate normally again.

MCM ♦ ProLinx Gateway Functional Overview

Modbus Master/Slave Driver Manual

Page 12 of 80 ProSoft Technology, Inc.

October 16, 2009

2.2 Serial Port Specifications

Type Specifications

Serial Ports

Serial Port Adapter Cables One MiniDIN to DB-9M adapter cable included for

each configurable serial port

Config Port Connector/ Pinout DB-9F connector / DTE pinout

Serial Port Isolation 2500V RMS port-to-port isolation per UL 1577.

3000V DC min. port to ground and port to logic

power isolation.

Serial Port Protection RS-485/422 port interface lines TVS diode protected

at +/- 27V standoff voltage.

RS-232 port interface lines fault protected to +/- 36V

power on, +/- 40V power off.

Note: On all ProLinx gateways, data from the application port on the main board, serial Port 0, is

not buffered. Packets go directly to and from the serial chipset to the processor. This has the

potential to cause the serial communications to become erratic at baud rates above 38,400 baud.

ProLinx gateways with 4 serial ports have a separate serial interface board for serial Ports 1, 2,

and 3. These serial ports are buffered and can handle communications up to 115,200 baud.

Functional Overview MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 13 of 80

October 16, 2009

2.3 Modbus Master/Slave Port Specifications

Type Specifications

General Parameters

Internal Database Up to 4000 registers (words) available.

Communication parameters Port 0: Baud Rate: 110 to 115K baud possible

110 to 38.4K baud recommended for all applications.

Higher baud rates are recommended only for use

with very slow Modbus polling rates (e.g. 1command

or less per second)

Port 1, 2, 3: Baud Rate: 110 to 115K baud

Stop Bits: 1 or 2

Data Size: 5 to 8 bits

Parity: None, Even, Odd, Mark, Space

RTS Timing delays: 0 to 65535 milliseconds

Modbus Modes RTU mode (binary) with CRC-16

ASCII mode with LRC error checking

Floating Point Data Floating point data movement supported, including

configurable support for Enron implementation

Modbus Function Codes 1: Read Coil Status

2: Read Input Status

3: Read Holding Registers

4: Read Input Registers

5: Force (Write) Single Coil

6: Preset (Write) Single Register

15: Force(Write) Multiple Coils

16: Force (Write) Multiple Register

Modbus Master

Command List Up to 100 command per Master port, each fully

configurable for function, slave address, register

to/from addressing and word/bit count

Status Data Error codes available on an individual command

basis. In addition, a slave status list is maintained

per active Modbus Master port.

Polling of command list Configurable polling of command list, including

continuous and on change of data

Modbus Slave

Node address 1 to 247 (software selectable)

Status Data Error codes, counters and port status available per

configured slave port starting at memory register

4400.

MCM ♦ ProLinx Gateway Functional Overview

Modbus Master/Slave Driver Manual

Page 14 of 80 ProSoft Technology, Inc.

October 16, 2009

2.4 Module Internal Database

The internal gateway database is central to the functionality of the gateway. This

database is shared between all the ports on the gateway This permits data from

devices on one communication network port to be viewed and controlled by

devices on another port or network.

Other ProLinx

Protocol

Driver

Modbus

Slave

Driver

Modbus

Master

Driver

ProLinx

Communication

Gatewa

y

s

Internal

Database

(

Up to 4000 re

g

s

)

Other ProLinx

Protocol

Driver

Modbus

Slave

Driver

Modbus

Master

Driver

ProLinx

Communication

Gatewa

y

s

Internal

Database

The Master driver uses the database in two ways:

 A read command issued to a slave device by the Master driver will return the

slave data into the internal database.

 A write command issued to a slave device by the Master driver uses the data

in the internal database as the source data to send to the slave.

The slave driver allows external Master devices to access the database, reading

data from the database or writing data to the database. External Modbus Master

devices can monitor and control data in this database through any port

configured as a slave.

Status and error data from the slave and Master ports generated by the gateway

can be mapped into the internal database, where it can be retrieved by either

protocol driver.

Functional Overview MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 15 of 80

October 16, 2009

2.4.1 Modbus Port Access to Database

The Modbus slave support in the gateway permits remote Master applications

(that is, HMI software, Quantum processors, and so on) to read from and write to

the gateway’s database.

When configured as a slave, the internal database of the MCM gateway is used

as the source for read requests and the destination for write requests from

remote Masters. Access to the database is controlled by the command type

received in the incoming message from the remote Master. The following table

defines the relationship of the gateway’s internal database to the addresses

required in the incoming Modbus TCP/IP requests:

Database Address Modbus Address

0 40001 (five-digit addressing) or 400001 (six-digit addressing)

1000 41001 or 410001

2000 42001 or 420001

3000 43001 or 430001

3999 44000 or 440000

The following virtual addresses are not part of the normal gateway user database

and are not valid addresses for standard data. However, these addresses may

be used for incoming commands that are requesting 32-bit floating-point data. To

use addresses in this upper range requires you to:

1 Set the Float Flag (page 19) to Y

ES

2 Set the Float Start (page 19) to a database address in the range below

3 Set the Float Offset (page 20) to a database address in the gateway user

memory area shown above.

Remember that, once you do this, all data in addresses above the Float Offset

address will be treated as 32-bit floating-point data and require two gateway

memory registers per Modbus address.

Database Address Modbus Address

4000 44001 (five-digit addressing) or 440001 (six-digit addressing)

5000 45001 or 450001

6000 46001or 460001

7000 47001 or 470001

8000 48001 or 480001

9000 49001or 490001

9999 50000 or 500000

MCM ♦ ProLinx Gateway Functional Overview

Modbus Master/Slave Driver Manual

Page 16 of 80 ProSoft Technology, Inc.

October 16, 2009

MCM Protocol Configuration MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 17 of 80

October 16, 2009

3 MCM Protocol Configuration

In This Chapter

 [Modbus Port x] .................................................................................18

 [Modbus Port X Commands] ..............................................................27

#This is an example of a Master port using Modbus RTU protocol

[Modbus Port 0]

# Settings required by both Master and Slave

Enabled : Yes #Port enable flag Y=Yes, N=No

RS Interface : 0 #0=RS-232, 1=RS-485, 2=RS-422

Type : Master #Port type M=Master, S=Slave

Float Flag : No #Use floating data type Y=Yes, N=No

Float Start : 7000 #Register offset in message for floats

Float Offset : 2000 #Internal Address for floats

Protocol : RTU #Modbus Protocol R=RTU, A=ASCII

Baud Rate : 384 #Baud rate for port

Parity : None #N=None, O=Odd, E=Even

Data Bits : 8 #5 to 8 data bits for messages

Stop Bits : 1 #1 or 2 stop bits for messages

RTS On : 0 #Delay after RTS set before msg sent (mSec)

RTS Off : 1 #Delay after message before RTS dropped(mSec)

Minimum Response Delay : 2 #Number of mSec to delay before respose

Use CTS Line : No #Monitor CTS modem line (Y/N)

Response Timeout : 1000 #mSec for response timeout of command

Retry Count : 2 #retry count for failed requests

# Settings required for Slave Driver

Internal Slave ID : 1 #Modbus Node address for this port on network

Bit Input Offset : 0 #Internal DB offset to bit input data

Word Input Offset : 0 #Internal DB offset to word input data

Output Offset : 0 #Internal DB offset to bit output data

Holding Register Offset : 0 #Internal DB offset to holding reg data

Use Guard Band Timer : N #Use packet gap timeout for messages

Guard Band Timeout : 0 #0=Use default for baudrate, or set timeout

# Settings required for Master Driver

Minimum Command Delay : 0 #mSec delay between commands

Error Delay Counter : 100 #0-65535 Command cycle count if error

Command Control Reg : -1 #DB start reg for Cmd Control (-1=disable)

[Modbus Port 0 Commands]

# Internal Poll Reg Swap Node Modbus MB Address

# Enable Address Interval Count Code Address Func in Device

START

1 0 0 10 0 1 3 0

1 10 0 10 0 1 4 10

END

MCM ♦ ProLinx Gateway MCM Protocol Configuration

Modbus Master/Slave Driver Manual

Page 18 of 80 ProSoft Technology, Inc.

October 16, 2009

3.1 [Modbus Port x]

The [Modbus Port x] sections of the CFG file, where x stands for 0, 1, 2, or 3, set

the Modbus Master and slave port communication parameters and define the

protocol-specific settings.

3.1.1 Enabled

YES or NO

This flag specifies if the port on the gateway will be utilized. If the parameter is

set to N

O, the port will not be used. If the parameter is set to YES, the port will be

used.

3.1.2 RS Interface

0 = RS-232

1 = RS-485

2 = RS-422

This parameter is used when Ports 1, 2, and 3 are present to configure the

electrical interface for these ports.

RS Interface selections for Port 0 are done with a jumper (electrical shunt) on the

back of the gateway.

3.1.3 Type

MASTER or SLAVE

This parameter defines if the port will emulate a Master or slave device. Choose

a value of M

ASTER to make the port function as a Modbus Master. Choose SLAVE

to make the port function as a Modbus slave.

MCM Protocol Configuration MCM ♦ ProLinx Gateway

Driver Manual Modbus Master/Slave

ProSoft Technology, Inc. Page 19 of 80

October 16, 2009

3.1.4 Float Flag

Yes or No

This flag specifies how the Slave driver will respond to Function Code 3, 6, and

16 commands (read and write Holding Registers) from a remote Master when it

is moving 32-bit floating-point data.

If the remote Master expects to receive or will send one, complete, 32-bit

floating-point value for each count of one (1), then set this parameter to Y

ES,

especially if the Master must read or write from Modbus addresses above

gateway address 3999 (virtual Modbus address 44000 or 440000). When set to

Y

ES, the Slave driver will return values from two, consecutive, 16-bit internal

memory registers (32 total bits) for each count in the read command or receive

32-bits per count from the Master for write commands. Example: Count = 10,

Slave driver will send 20, 16-bit registers for 10 total 32-bit floating-point values.

If, however, the remote Master sends a count of two (2) for each 32-bit floating-

point value it expects to receive or send, or, if you do not plan to use floating-

point data in your application, then set this parameter to N

O, which is the default

setting.

You will also need to set the Float Start and Float Offset parameters to

appropriate values whenever the Float Flag parameter is set to Y

ES.

3.1.5 Float Start

0 TO 65535

Whenever the Float Flag parameter is set to Y

ES, this parameter determines the

lowest Modbus Address received in commands from a remote Master to consider

as requests to read or write floating-point data. All commands with address

values greater than or equal to this value will be considered floating-point data

requests. All commands with address values less than this value will be

considered normal 16-bit register data requests.

This parameter is used only if the Float Flag is set to Y

ES. For example, if a value

of 7000 is entered, all commands received with addresses of 47001 (or 407001)

and above will be considered as requests for floating-point data and 32-bits of

data will be returned for each count of one in the command.

You will also need to set the Float Offset parameter to an appropriate value

whenever the Float Flag parameter is set to Y

ES.

MCM ♦ ProLinx Gateway MCM Protocol Configuration

Modbus Master/Slave Driver Manual

Page 20 of 80 ProSoft Technology, Inc.

October 16, 2009

3.1.6 Float Offset

0 TO 3998

This parameter defines the starting register for floating-point data in the internal

gateway database. This parameter is used only if the Float Flag is set to Y

ES.

For example, if the Float Offset value is set to 3000 and the Float Start parameter

is set to 7000, the data returned as floating-point data for register 47001 (or

407001) will actually come from internal gateway registers 3000 and 3001. If the

requested address was 47002 (407002), the data will be returned from internal

registers 3002 and 3003. If the requested address was 47101 (407101), the data

will be returned from internal registers 3200 and 3201; and so on.

3.1.7 Protocol

RTU

ASCII

This parameter specifies the Modbus protocol version to be used on the port.

Valid Protocols are RTU and ASCII.

3.1.8 Baud Rate

This is the baud rate to be used on the port. Enter the baud rate as a value.

Baud Rate Parameter Value

110 110

150 150

300 300

600 600

1200 12 OR 1200

2400 24 OR 2400

4800 48 OR 4800

9600 96 OR 9600

14,400 14, 114 OR 14400

19,200 19, 192 OR 19200

28,800 28, 288 OR 28800

38,400 38, 384 OR 38400

57,600 57 OR 576

115,200 115 OR 1152

Note: On all ProLinx gateways, data from the application port on the main board, serial Port 0, is

not buffered. Packets go directly to and from the serial chipset to the processor. This has the

potential to cause the serial communications to become erratic at baud rates above 38,400 baud.

ProLinx gateways with 4 serial ports have a separate serial interface board for serial Ports 1, 2,

and 3. These serial ports are buffered, and can handle communications up to 115,200 baud.

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