HORNER PLC (XLT) automatic reboot

[atberthel]

Hi,

I'm using a HORNER XLT with two SmartStix modules.
After some hours of normal operation the PLC re-starts automatically(again and again). After some minutes or at least one night with power off it is possible to use the machine again (for a couple of hours).

I have already checked/replaced the power-supply. The temperatures in the electrical cabinet are around 35°C (95°F).
I'm using Cscape Software 9.1 and the IEC editor.

Has anyone ever had a behaviour like this? I guess there is a divide by zero or a endless loop or something like this in my program.
But I can't find it.
Will the XLT behave like this in that situation?
Is it possible to find the reason for the restart (log, some system registers,...)?

Thanks for any help.

Alex

 

[CowDung]

I've had a similar problem after I loaded a program with the 'wrong' firmware version into the PLC. It kept rebooting itself. I did a firmware upgrade and reloaded the program and all was well...