At a Glance

This parameter defines the fallback mode adopted by outputs when the PLC switches to STOP due to:

  • a processor error

  • a rack connection error

  • an inter-rack cable connection error

  • a STOP command in Control Expert.

The modes are as follows:

Mode

Meaning

Fallback

Channels are set to 0 or 1 according to the defined fallback value for the corresponding 8-channel group.

Maintenance

The outputs remain in the status they were in before switching to Stop.

Procedure

The following table shows the procedure for defining the fallback mode to be assigned to a channel group.

Step

Action

1

Open the desired module configuration screen.

2

For the desired channel group, click on the arrow of the Fallback mode drop-down menu.

Result : The following list appears.

3

Select the desired fallback mode.

4

For Fallback mode, configure each channel of the selected group.

To do this, click on the drop-down menu arrow of the channel to be configured, located in the Fall Back Value column.

5

Click on the desired value (0 or 1).

6

Confirm the modification with the Edit > Validate menu command.