Micom P14 lockout 8c0f:0000

[Asugre]

I have this lockout with the below code appearing from time to time.

8c0f:0000

What is the cause of this and how can it be resolved.

[Omaelk]

@AndreMelo, can you please support? 

[AndreMelo]

Hi @Asugre , please find below the error description it seems not to be a permanent error and a restart normally should solve that. However, if it persists it may indicate a issue and the CCC shall be contact.

0x8C0F0000

2349793280

The error code is related to the main sampling buffer. When the relay samples a new set of analogue channels it puts the data in a 2 cycle buffer. This is done in an interrupt. Later the protection task runs and extracts data from the buffer, thus free up space for new samples. This maintenance occurs if the buffer becomes full, i.e. samples are put in faster than they are removed. The maintenance error and reboot clears out the buffer and allows the protection to restart. The relay runs a multitask operating system which switches tasks in and out. The sampling interrupt is one of the highest priority tasks and will always run, the protection task is also high priority but not the highest. Another task may have run for longer than expected preventing the protection task from running.

[Asugre]

Thanks for the reply @AndreMelo .

A reboot does clear the fault but it has occurred about 4 times in the past year. I’ll keep monitoring.

I have another issue with the same relay but this has happened only once. It recorded a watchdog alarm and reboot itself to be operational again. Upon checking the maintenance events, i found:

maint type 26

Maint data 0xFFFB0000

I can’t seem to find any interpretation of this in the manual.

Can you please assist with this.

Thanks a lot.

Regards 

Aaron

[AndreMelo]

Hi @Asugre,

Unfortunately, this second error code is not in my error code list. In this case, you shall open a ticket on your local CCC.  It can be a consequence of the sampling error your relay is presenting.

Best Rgards