Rockwell Automation 1797-OE8 FLEX Ex Analog Modules User Manual - Manual (Page 54)

Publication 1797-6.5.1 - May 2005
4-6 Input, Output, and Configuration Files for the Analog I/O Modules on the ControlNet Network
Possible causes for an I/O Module Fault are:
• transmission errors on the FLEX Ex backplane
• a failed module
• a module removed from its terminal base
• incorrect module inserted in a slot position
• the slot is empty
• the slot contains a non-discrete module
Fault State Data The ControlNet Ex adapter provides storage for alternate module output data
during communication faults or processor idle state. This “fault state data”
assures that a known output will be applied to the output devices during the
previously mentioned modes.
The processor or scanner software must include the means to specify this fault
state data for each module. If applicable, this data is sent in the configuration
block, see Image Table Mapping on page 2-13.
Device Actions Device actions include:
• communication fault behavior
• idle state behavior
• input data behavior upon module removal