Rockwell Automation 1797-OE8 FLEX Ex Analog Modules User Manual - Manual (Page 23)

Publication 1797-6.5.1 - May 2005
Understanding Configurable FLEX Ex Analog Module Features 2-7
Selecting a 1797-OE8 FLEX
Ex Analog Output Module’s
Operating Features All features of the 1797-OE8 analog output module are independently
configurable in two four-channel groups (channel 0-3 & channel 4-7).
Output Enable
The Output Enable feature provides user control of the FLEX Ex I/O
module’s output channels.
At power-up, the ControlNet Ex adapter (1797-ACNR15) and the
FLEX Ex I/O modules use a default state of no communications over the
network. Use your programming software to change the Output Enable
bit to 1 to begin communications over the network.
If network communication is ever lost during normal operations, the adapter
resets the Output Enable bit to 0, and any connected I/O modules execute
their fault routine, including transitioning to fault state and setting outputs to a
user-defined fault state. When network communications resume, the adapter
sets the Output Enable bit to 1 and normal I/O operations continue.
Local Fault Mode
The Local Fault Mode can be programmed to determine how the module
responds to communications faults and internal module faults.
When setting the Local Fault Mode feature in your programming software, set
this feature’s bit to 0 to use the analog fault state or digital fault state only if a
communications fault occurs. Set the bit to 1 to use the analog fault state or
digital fault state if any fault occurs.
IMPORTANT
The default selection value for all parameters is 0.