1769-L31 Run Mode
1769-L31 Run Mode
(OP)
Hello Everyone:
Every time that I power up the PLC, Rockwell 1769-L31, it goes strait to Fault and STOP, although the switch is in RUN position.
If I connect the PC to it, I can see the origin of the error: Power Supply Failure !!!
How can I put the PLC automatic in RUN mode without any faults as soon as I power him up?
thanks,
Miguel Ferreira
Every time that I power up the PLC, Rockwell 1769-L31, it goes strait to Fault and STOP, although the switch is in RUN position.
If I connect the PC to it, I can see the origin of the error: Power Supply Failure !!!
How can I put the PLC automatic in RUN mode without any faults as soon as I power him up?
thanks,
Miguel Ferreira





RE: 1769-L31 Run Mode
Is this an existing processor that just started faulting on power up or a new processor?
RE: 1769-L31 Run Mode
This is a new PLC with new code, that I can't get it running as soon as I power up.
RE: 1769-L31 Run Mode
Also list your rack layout. how many modules...ect..
RE: 1769-L31 Run Mode
The Fault Handler Routine just has one line
It's a SSV block with:
Class Name: Program
Instance Name: This
Attribute Name: MAJORFAULTRECORD
Source: MyFaulTag.TimeLow
MyFaultTag is a FaultRecord
The Hardware configuration is:
[1] to [5] are 32 Dig.Inputs - 1769-IQ32/A
[6] to [7] are 32 Dig.Outputs - 1769-OQ32/A
[8] 8 analogue inputs - 1769-IF8/A
[9] 8 analogue outputs - 1769-OF8V/A
[10] High Speed Counter - 1769-HSC
Thanks,
Miguel
RE: 1769-L31 Run Mode
RE: 1769-L31 Run Mode
TW Controls - http://www.twcontrols.com
RE: 1769-L31 Run Mode
RE: 1769-L31 Run Mode
TW Controls - http://www.twcontrols.com
RE: 1769-L31 Run Mode
We had to remove the extra power supply and add the 1769-PA2 supply. Then set the analog card back to buss.
In summery, do not use external power supplies to power the analog cards and make sure the switches are all set to "Buss".