The red error light on an Omron CQM1 plc was on and i think it is a flat battery problem. I looked on RS and they are £80. The Maxell 3.6 volt battery was not available but a Saft with the same voltage and very similar type number is £6 from CPC. The Omron one appears expensive for what it is. I am tempted to mount the battery outside of the main processor because they can leak and wreck the most expensive part of the plc.
Has anyone else done this repair?
