SLC 5/03 fault code 0021h

JojoD

Member
Join Date
Nov 2008
Location
San Pedro Laguna
Posts
3
Hi, I have encountered fault code 0021h on our existing controls (fault LED lights and the system stops); description in help file says "the remote power failure of an expansion rack has occured" but we're only using a single 7-slot rack. The plc communicates with micrologix 1200 via two links (1747-AIC and 1761-AIC) for interlock commands using messaging. Hope anyone can suggest how to solve/ remove the error. thanks.....
 
SLC 5/03 fault code 21h

Thanks for the assist, Mickey...have done instructions, still problems persists...we traced low ac supply to P2(77Vac instead of 85-132Vac required by P2 powersupply module) via deffective breaker...breaker was replaced, AVR installed and CPU(5/03) was replaced(per supervisor instructions). Problem disappeared, unfortunately we have not yet established which caused it (ac supply or malfunctioning CPU) due to operational needs. Will try to check when system is available later and give feedback asap for clarity and future references. Many thanks.....
jojod
 
JojoD said:
Thanks for the assist, Mickey...have done instructions, still problems persists...we traced low ac supply to P2(77Vac instead of 85-132Vac required by P2 powersupply module) via deffective breaker...breaker was replaced, AVR installed and CPU(5/03) was replaced(per supervisor instructions). Problem disappeared, unfortunately we have not yet established which caused it (ac supply or malfunctioning CPU) due to operational needs. Will try to check when system is available later and give feedback asap for clarity and future references. Many thanks.....
jojod

Your Welcome.
My money is on the bad power.
 

Similar Topics

Hello I was wondering if any of you would have an idea of an issue i have. I had a Processor failure. I installed a new processor, albeit a...
Replies
37
Views
12,787
Has anyone ever gotten a Fault Code = 0002H on a SLC before? Here's the accompanied message: "Unexpected hardware watchdog timeout or an ASIC...
Replies
10
Views
17,557
Hello all! I have some machines that run an SLC 5/03 and occasionally a fault is generated. Recent Example: A power supply wasn't screwed in...
Replies
3
Views
401
hello at work we have a machine controlled with an SLC 500 fixed, model 1747-l30c at fault, i plan to migrate to a micrologix controller. I'm...
Replies
7
Views
2,987
Has anyone ever seen this fault or have any insight as to what it was. I found this on an SLC 505 after we had the main breaker off working in...
Replies
1
Views
1,406
Back
Top Bottom