Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual - Manual (Page 75)

Publication 1797-6.5.3 - March 2006
Input, Output and Configuration Files for the Analog I/O Modules on the ControlNet Network 4-7
Possible causes for an I/O module fault are:
• Transmission errors on the FLEX Ex backplane
• Failed module
• Module removed from its terminal base
• Incorrect module inserted in a slot position
• Slot is empty
• Slot contains a non-discrete module
Fault State Data The FLEX Ex HART modules provides storage for alternate module output
data during communication faults or controller idle state. This fault state data
assures that a known output will be applied to the output devices during the
previously mentioned modes.
The controller 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 2-12.
Device Actions Device actions include:
• Communication fault behavior
• Idle state behavior
• Input data behavior upon module removal