Discrete application configuration
How to modify the Fallback mode parameter of a discrete module
At a Glance
Procedure
This parameter defines the fallback mode adopted by outputs when the PLC changes to Stop, in the event of a processor or rack fault.
The possible modes are as follows: l l l l
Fallback to 0 : the outputs are set at state 0,
Maintain state : the outputs remain in the state in which they were before the change to Stop.
This parameter applies: to all the outputs of a module for half format modules or mixed module outputs, to the even or odd position for a 32 output channel module.
The table below shows the procedure for defining the Fallback mode assigned to a group of channels.
Step
1
2
Action
Access the hardware configuration screen of the required module.
Click on the Fallback to 0 / Maintain state check box located in the module zone of the Fallback mode field.
Result : the fallback mode chosen will then be assigned to the module.
TSX DMZ 28AR [INPUTS: POSITION 06]
Configuration
Designation: 16E 115VCA+12S REL.BORN
Fallback mode on failure
Fallback to 0
Maintain state
Outputs
88
TLX DS 37 PL7 xxE
