Specifications

Analog Input Modules
31007715 6/2008 153
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
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 in pre-operational
mode.
blink 1** Island bus controller error. Replace the module.
flicker* Field power absent or a PDM short
circuit detected.
Check power
Broken wire detected in RTD or TC
mode.
Locate and repair wiring
problem.
Measurement out of limits Check configuration and
application.
Internal error Cycle power; if the problem
remains replace the module.
* 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.
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