Specifications

Analog Output Modules
308
31007715 6/2008
Indications The following table defines the meaning of the two LEDs (where an empty cell
indicates that the pattern on the associated LED doesn’t matter):
RDY ERR Meaning What to Do
off off The module is either not receiving logic power
or has failed.
Check power
flicker* off Auto-addressing is in progress.
on off The module has achieved all of the following:
z it has power
z it has passed its confidence tests
z it is operational
on on The watchdog has timed out. Cycle power, restart
the communications
blink 1** The module is either in pre-operational mode
or in its fallback state.
flicker* Field power absent or a PDM short circuit
detected.
Check power
blink 1** A nonfatal error has been detected. Cycle power, restart
the communications
blink 2*** The island bus is not running. Check network
connections, replace
NIM
blink 3**** The output channels on this module are
operational while the rest of the island
modules are in their fallback states. This
condition could occur if the module is used in
a reflex action.
* flicker—the LED flickers when it is repeatedly on for 50 ms then off for 50 ms.
** blink 1—the LED blinks on for 200 ms then off for 200 ms. This pattern is repeated until
the causal condition changes.
*** blink 2—the LED blinks on for 200 ms, off for 200 ms, on again for 200 ms then off for
1 s. This pattern is repeated until the causal condition changes.
**** blink 3—the LED blinks on for 200 ms, off for 200 ms, on for 200 ms, off for 200 ms, on
again for 200 ms then off for 1 s. This pattern is repeated until the causal condition
changes.
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