Modifying the Fallback Value of an Output
(Original Document)
About us
At a Glance
When an output is configured in Fallback mode, the corresponding button is valid but the Fallback/Maintain information is grayed out, because the fallback mode cannot be modified in Debugging mode. However, it is possible to change the fallback value by entering a new value.
Procedure
The table below summarizes the procedure for modifying the fallback value:
Step
Action for a channel
1
Access the debug screen.
2
Select the channel in the Display zone and double-click in the corresponding box in the Fallback column.
Result: The Adjust channel dialog box appears.
3
Click on the box in the Value field of the Fallback dialog box and enter the new fallback value.
The value must be:
  • For TSX ASY 800 and ASY 410 software version modules < 1.0
    • between -10000 and 10000 in range 10 V
    • between 0 and 10000 in ranges 0..20 mA and 4..20 mA
  • For TSX ASY 800 and ASY 410 software version modules > 1.0
    • between -10500 and 10500 in range 10 V
    • between 0 and 10500 in ranges 0..20 mA and 4..20 mA
4
Confirm this new value by clicking OK.
5
Close the Adjust channel dialog box.
Notes
NOTE: The fallback value can also be modified for each program, with the WRITE_PARAM instruction.
NOTE: The fallback value cannot be modified on TBX modules.