Momentum stops with code 8010

[iansabey]

Hi all, I have a problem with a momentum PLC which is going spontaneously from 'run' to 'stop'. Going online (with concept) shows the cpu status as 8010. When I set it to run again it is fine for a while and then stops again. I can find no mention of this status code in any documentation. This plc is a replacement (about 3 months old) for another which did exactly the same thing so I guess the problem lies elsewhere. In the same plant are several (about 120) other momentums which don't exhibit this behaviour. Can anyone point me to the meaning of the error code? Thanks Ian.