Hi,
We are having issues with an intermittent Major error code 21h. The plc can be running for varying amounts of time before faulting anything between 15 mins to 3 hours making it difficult to identify the issue. We have an SLC 500 with a 13 slot rack and p2 power supply. The cards are a mixture of input and output with analogue and thermocouple cards.
We have swapped the rack and power supply and the same fault appeared after 3 hours. Is there any way of identifying which module is causing the issue?
thanks in advance
We are having issues with an intermittent Major error code 21h. The plc can be running for varying amounts of time before faulting anything between 15 mins to 3 hours making it difficult to identify the issue. We have an SLC 500 with a 13 slot rack and p2 power supply. The cards are a mixture of input and output with analogue and thermocouple cards.
We have swapped the rack and power supply and the same fault appeared after 3 hours. Is there any way of identifying which module is causing the issue?
thanks in advance