Rockwell Automation 1797-OE8H FLEX Ex 8 Output Analog Modules - Manual (Page 32)

32 FLEX Ex 8 Output and HART Analog Modules
Publication 1797-5.3 - September 2011
Program Mode Behavior
The adapter also monitors the state of the controlling processor or scanner.
Two states can be detected: run mode and program mode (idle).
When program mode is detected, the adapter can be configured to:
• continue writing the last valid received data to the module (hold last
state).
• apply local module safe states. (1)
• write a programmable fault state value to the module, depending upon
the module type. (2)
1797-OE8 FLEX Ex Output Module Operation
Flexbus Communication Monitoring
The module monitors flexbus communication activity and the state of its
Output Enable bit. If it detects loss of flexbus communication activity or the
Output Enable bit transitioning to 0, it can be programmed to:
• continue writing the last valid received data to the outputs (hold last
state).
• reset the outputs.
• write the local module fault state value to the output, depending upon
the module type.
This mechanism primarily targets fault behavior for loss of backplane
communication.
(1) This selection could be shown as Reset Outputs but its action is Apply Local Module Safe States.
(2) This option is only available in some adapters.