Rockwell Automation 1503VC IntelliVAC Plus Contactor Control Module - Manual (Page 65)

4-38 Description of Features
1503-UM054C-EN-P – June 2013
MC Altitude Setting Warning
This is a Warning condition which indicates that the Altitude DIP switch
settings on the Basic modules in an MC system (one [1] Basic module on
the IntelliVAC Plus module and up to four [4] Basic modules on the
IntelliVAC MC units) are not all set to the same value. This is an issue
because all of the contactors in an MC system will be installed at the same
altitude so that there would not be a reason for each of the contactors to
have different altitude settings. Because of this all of the units must have
the same altitude settings. Having incorrect settings for altitude will cause
the coil currents, for contactors with the incorrect altitude settings, from
being correct thus preventing proper closure of the contactor (too little
current) or causing contactor damage (too much coil current).
The Plus status LED is pulsing Green with a pattern of 7 pulses.
In RESET Mode or Firmware (F/W) Crash
This is a Fault condition which indicates that the IntelliVAC Plus is
in RESET mode or that the F/W has crashed and is no longer
operating correctly. To alleviate this problem, the mains power
and/or the DeviceNet power should be cycled.
The Plus status LED is solid Red or it could be Green or it could be
Yellow or it could be pulsing between Red and Yellow or pulsing
between Green and Yellow. The reason for this variation is that the
Plus status LED is actually comprised of two individual internal
LEDs; a Red LED and a Green LED. During a RESET mode the
Red LED is forced on but the Green LED will be off. However,
during a F/W crash both the Red and Green LEDs will be under
control of runaway F/W which could cause any of the two LEDs to
be turned on at any time. This F/W crash condition will be short
lived because protection circuitry will eventually force the
IntelliVAC Plus module into RESET which will cause the Plus status
LED to be Red only.
POST Failure – RAM
This is a Fault condition which indicates that the internal RAM of
the IntelliVAC Plus module is faulty. This will prevent proper
operation of the firmware. Because of this the product firmware
cannot be executed.
The Plus status LED is pulsing Red with a pattern of 2 pulses.