How to Access Digital Channel Forcing/Unforcing

At a Glance

This function allows the status of channels linked to an AS-Interface digital slave to be modified.

NOTE: The state of a forced output is frozen and can only be modified by the application after manual unforcing. However, in the event of a detected error leading to output fallback, the state of these outputs assumes the value defined by the Fallback Mode parameter configuration.

The different commands available are:

For a channel:
- Forcing to 0
- Forcing to 1
- Unforcing
For all the channels (when at least one channel is forced): Global unforcing

CAUTION

UNEXPECTED BEHAVIOR OF APPLICATION

Do not force a channel to a new value, if the results are not completely understood.

Failure to follow these instructions can result in injury or equipment damage.

Forcing/Unforcing Procedure

Use the procedure below to force or unforce the channels linked to a slave.

Step	Action for one channel	Action for a group of channels
1	Access the AS-Interface module debugging screen.
2	Select a slave in the V3 AS-interface Configuration zone.
3	Select the channel to modify in the slave zone table.	Click on the global Unforce button in the slave zone.
4	The channel can be modified using the buttons situated in the Channel Action field.
5	Select the required function using the buttons Force to 0 or Force to 1 in the Channel Action field.