Skov Silo Weighing Module Technical User Guide

Brand: Skov

Model: Silo Weighing Module

Type: Technical User Guide

2019.05.22 • 603910

Silo Weighing Module

Technical User Guide

Technical User Guide 3

Silo Weighing Module

Product and Documentation Changes

This product was released in May 2005.

We reserve the right to change this manual and the product described herein without further notice. In case of

doubt, please contact us.

Date of change appears from the front- and back page.

We recommend that ventilation systems should be mounted, operated and serviced only

by trained staff and that a separate emergency opening unit and an alarm system be

installed as well as maintained and tested at regular intervals, according to our terms and

conditions of sale and delivery.

The installation, service and troubleshooting in connection with electrical equipment must

be carried out by specialists in accordance with applicable national rules - in Europe in

accordance with EN 60204-1 and other applicable EU rules.

The installation of a supply isolator is required for each motor and power supply, so

maintenance of electrical equipment can be carried out in a dead environment. Supply

isolator is not supplied by us.

Note

written permission of us in each case.

• We have made reasonable efforts to ensure the accuracy of the information contained in this manual. Should

any mistakes or imprecise information occur in spite of this, we would appreciate being notified thereof.

• Irrespective of the above, we shall not have any liability with respect to loss or damage caused or alleged to

be caused by reliance on any information contained herein.

Technical User Guide 
 
Silo Weighing Module 
Product Description..................................................................................................5 
Mounting and Installation Guide .............................................................................5 
1 Silo-weighing module with two terminal inputs and max. 1 metre CAN cable ............... 6 
2 Silo-weighing module with two terminal inputs and max. 200 metres CAN cable ......... 7 
Settings ......................................................................................................................8 
1 CAN Addresses ..................................................................................................................... 8 
2 CAN Termination Jumpers (max. 1 meter) ......................................................................... 9 
3 CAN Termination Jumpers (max. 200 meters) ................................................................. 10 
Calibration ............................................................................................................... 10 
1 Error during Calibration ..................................................................................................... 13 
Technical Data ........................................................................................................ 14 
 
 
 
 
 
   

Technical User Guide 5

Silo Weighing Module

1 Product Description

This manual concerns installation of a silo-weighing module in a climate and production computer and is

primarily aimed at electricians who are to mount, install and calibrate the weighing module.

A certified electrician must carry out the installation in accordance with applicable national rules and in Europe

in accordance with applicable EU rules.

At silo weighing, a load cell records the weight of the silo content and transmits it to the silo-weighing module.

The module transforms the weight into a value (0-10V) which the climate and production computer can use.

The module is available with two and four input terminals. Up to eight load cells can be connected to each

terminal input, e.g. WB1600 or WB6000.

2 Mounting and Installation Guide

The way of connecting the silo-weighing module depends on the distance between the silo and the climate and

production computer. Select the wiring diagram corresponding to the actual distance (more or less than 30m).

Connection of load cells

Type:

WB 1600

WB 6000

SB-A 3T/5T

SB-A 10T

Silo weighing

module

White

Red

Red+ Blue

O1+

Blue

Green

I1+

Brown

White

I1-

Black

Black+Yellow

O1-

Shield(Cable)

GND

6 Technical User Guide

Silo Weighing Module

2.1 Silo-weighing module with two terminal inputs and max. 1

metre CAN cable

1) Check that the silo is placed max. 30m from the climate – and production computer.

2) Mount a small watertight junction box next to the silo so that all load cell cables can reach it. (The

junction box is not included in the delivery).

3) Mount the silo weighing module next to the climate computer.

4) Connect the silo load cell cables in parallel in the junction box.

5) Connect the load cell cable shields mutually in the junction box with short connections (max. 20mm).

6) Connect the junction box with the silo weighing module with max. 30m shielded four-wire load cell

cable.

7) Attach the silo weighing module by means of max. 1m four-wire shielded cable to the four-poled

terminal strip on the I/O-module in the climate - and production computer.

8) Connect the cable shield under the toggle in the weighing module.

I/O Modul

Technical User Guide 7

Silo Weighing Module

2.2 Silo-weighing module with two terminal inputs and max. 200

metres CAN cable

1) Check that the silo is placed more than 30m from the climate and production computer.

2) Mount a small watertight junction box or the silo weighing module next to the silo so that all load cell

cables can reach it. (The junction box is not included in the delivery).

3) Mount the silo weighing module max. 30m from the junction box. The silo weighing module can be

mounted outdoor.

4) Connect the silo load cell cables in parallel in the junction box.

5) Connect the load cell cable shields mutually in the junction box with short connections (max. 20mm).

6) Connect the junction box with the silo weighing module with max. 30m shielded four-wire load cell

cable.

7) Mount the manufacturer-supplied data network module on the main module. Fasten the screw firmly

and connect the flat cable.

8) Attach the silo weighing module by means of max. 200m two-wire twisted pair with double shield

(Cat. 5 cable twisted pair) to the data network module in the climate computer. Always use two wires

from the same twisted pair to CAN HI and LO. Do not use two wires from different pairs).

9) Connect the cable shield under the toggle in the weighing module and on the data network module.

10) Connect 230/240 V mains voltage to the power module in the silo weighing module.

Data network

module

8 Technical User Guide

Silo Weighing Module

3 Settings

3.1 CAN Addresses

The module must have a certain CAN address so that the computer can communicate with it. The address of the

individual module corresponds to the number of the module.

In the menu Technical / Setup / Installation / I/O modules / Silo Weighing boxes

Set the weighing modules two address switches

(Rotary Switch) X1 (and X10*) as follows:

Module 1 Type 5 W X1 Address = 1

Module 2 Type 5 W X1 Address = 2

*The address switch X10 on the weighing module is not to be changed, as it is only used when there are more

than 10 weighing modules.

Weighing module 1

Weighing module 2

I/O module

Technical User Guide 9

Silo Weighing Module

3.2 CAN Termination Jumpers (max. 1 meter)

The modules are controlled by CAN-bus communication. To obtain a safe communication between the

modules, it is important that the CAN termination jumpers are set correctly.

1) Set the jumper ”ON/OFF CAN TERM” to OFF.

2) Set the jumper ”ON/OFF CAN TERM” to OFF.

3) Set the jumper ”ON/OFF Terminate” to ON.

Max. 1 meter

2 input weighing module

10 Technical User Guide

Silo Weighing Module

3.3 CAN Termination Jumpers (max. 200 meters)

The modules are controlled by CAN-bus communication. To obtain a safe communication between the

modules, it is important that the CAN termination jumpers are set correctly.

1) Set the jumper ”ON/OFF CAN TERM” to OFF

2) Set the jumper ”ON/OFF CAN TERM” to ON

3) Set the jumper ”ON/OFF TERMINATE” to ON (weigher module).

4) Set the jumper ”ON/OFF INT-TERM CAN” to OFF (datanet module RS485/CAN).

5) Set jumper ”ON/OFF EXT-TERM CAN” to ON (datanet module RS485/CAN)

4 Calibration

See the menu Technical / Calibration / Production / Silo / Silo

Enter the weight of the silo content at calibration.

(The more weight in the silo, the more precise the calibration will be.

Min. 100kg).

It is possible to make an offset to render the current indication from

the silo correct (the offset weight of the silo).

During calibration, the computer will generate an alarm for Missing I/O. This is normal and due to the fact that

the communication between the computer and the weighing module is disconnected

Max. 200 meters

2 input weighing module

Technical User Guide 11

Silo Weighing Module

The calibration value should only be changed in connection with calibration as a subsequent

change will have an influence on the silo content view.

Figure 1: Calibration of weighing module

Do the following to calibrate the weighing module

1) Make sure that the green PWR lamp emits light constantly (must not flash).

Yellow TX lamp and green RX lamp must flash right from the beginning.

2) Set switch #1 to ”S” (= setup) and #2, 3 and 4 to NORMAL.

3) Press the RESET button for 1 sec.

4) Wait 4 sec. until the red BUS lamp switches on* and emits light constantly

(must not flash).

12 Technical User Guide

Silo Weighing Module

Load cell input A

Load cell input B

5) Select the load cell input to be calibrated (only one at a time):

Silo#1: Set switch #3 to “A”

Silo#2: Set switch #4 to “B”

6) Make sure that the silo is empty (TARA).

7) Set switch #2 to “C” (= Calibration).

8) Wait until yellow TX lamp switches on *.

Red BUS lamp switches off.

9) Load the silo with a known test load

(the available weight at the time of the calibration).

10) Wait a few seconds until the weigher has settled at a cetain weight.

11) Return switch #2 to “NORMAL” position.

If the green RX lamp switches on, the calibration is accomplished OK*.

12) Return switch #1to NORMAL.

13) Return switch #2, 3 and 4 to NORMAL.

14) Remove the test weight from the silo (cf. item 9).

15) Press the RESET button.

This routine saves the TARE and TEST calibration values in the weighing module.

Technical User Guide 13

Silo Weighing Module

4.1 Error during Calibration

*) In case of an error, the RED+YELLOW+GREEN lamp will flash.

The calibration can fail

• if switch 1 or 2 is not set correctly.

• if the scale is defective or if there is no connection to the scale.

• if the value with the test load (calibration plumb) is too light.

The test load must be min. 1 per mille and max. 10 per cent of full load. Full load is 2 mV/V.

Example: If the load amplifier is e.g. connected to four load cells, which give 2 mV/V at 2000 kg, the

calibration plumb must weigh min. 8 kg and max. 800 kg.

• if errors occur when data are saved.

The error can be remedied by:

• Setting switch 1, 2, 3 and 4 to NORMAL.

• Pressing the RESET button.

• Repeating the calibration.

14 Technical User Guide

Silo Weighing Module

5 Technical Data

Electric

Mains voltage (nominal)

24V DC/AC

Mains voltage area

18V DC – 42V DC. 14V AC – 30V AC

Power consumption

0.125 mA

Max. power consumption

3 Watt

Analog I/O connection

Output

GND/ +5 V

Input

GND/ +15 V

Function

Accuracy

0,2 % FSD (0 to +50 °C (+32 to 122 °F))

Indicators

Relay panel PCB : Red LED: Power

Processor: Green LED: Power/runs*)

Red LED: Bus error

Yellow LED: Data transfer

Green LED Data reception

*) In case of a fatal error in the module, the green LED will flash.

The module ought to be replaced.

The indicators also indicate the status in connection with calibration

Environment

Ambient temperature, operation

0 to +50 °C (+32 to 122 °F)

Ambient temperature, storage

-25 to +70 °C (-13 to +158 °F)

Ambient humidity, operation

15-95 % RH

EMC standards

EN 50081-1/2; EN 50082-1; EN 61000-6-2; CISPR 22 class B

Protection class

IP65

Shipping

Silo weighing module 1M

Silo weighing module 200M

Dimension HxBxD:

192x164x87 mm

291x241x128 mm

Dimension packaged HxBxD:

310x230x100 mm

370x290x200 mm

Shipping weight

1 kg

3 kg

SKOV A/S • Hedelund 4 • Glyngøre • DK-7870 Roslev

Tel. +45 72 17 55 55 • Fax +45 72 17 59 59 • www.skov.com • E-mail: [email protected]

2019.05.22 • 14.05 • EN • Made in Denmark

Skov Silo Weighing Module Technical User Guide

Skov Silo Weighing Module Technical User Guide

Skov Silo Weighing Module Technical User Guide

Related papers

Other documents