ABB DO610 digital output module
3.9 Checking Load Cell Signal PolarityThis is a simple method to check that the load cells are connected to give a positive output
signal change from the tension electronics for increased web tension.
1. Push with your hand to apply a force corresponding to increased web tension on one load
cell at a time (as close to the load cell as possible) and check if the display reading is
positive. If the display reading is negative, invert the load cell signal connection to the
tension electronics.
NOTE
If you don’t know in which direction the force is acting,
connect load cell A and B with the same force direction.
To change the polarity of load cell A, invert X1:5 and 6 (In A+ and In A-).
To change the polarity of load cell B, invert X1:9 and 10 (In B+ and In B-).
2. After changing load cell polarity, check that the display reading is positive for increased
web tension.
3.10 Checking Load Cell Function
The “Hanging Weight” procedure can also be used as a function test on load cells,
see Section 3.8.1.
The rope should then be placed in the web path but as close as possible to one of the
load cells. The output signal should be noted, and the rope moved close to the other
load cell. Check that the difference in output signal is small.

The complete setup is built up by a number of main and sub menus. The table below shows the
main menus in order of appearance when stepping through the complete setup. The table also
gives an overview of the selections and parameter settings you can do below in each main menu.
The complete setup sequence is described in Section 3.12.
Main menus Selections and parameter settings See details
in section...
Set language
Set unit/web width
Set Decimals
3.12.1
Set object type
- Standard roll (load cells A and B) or
- Single side measurement (load cell A or B)
3.12.2
Set nominal load 3.12.3
Zero set load cells 3.12.4
Set hanging weights (actual force) or
Set wrap gain (calculated value)
3.12.5
Set filter settings
Set high tension value and high output
voltage
Set low tension value and low output voltage
Set high and low output voltage limit
3.12.6
Set filter settings
Set high tension value and high output
current
Set low tension value and low output current
Set high and low output current limit
3.12.7
Set Profibus address and measuring range.
Reset all values to factory default
3.12.8
Read service information
Reset maximum load for load cell A
Reset maximum load for load cell B
Activate/deactivate simulation