PM865-Fault (Modulebus Scan time error)
we are using a redundant PM865 Controller with SM811 Modules for safety related process control (both with HI-firmware).
Last Sunday (when no-one was working with it - the plant is also not yet commissioned and therefore not running) both redundant controllers stopped. We had to reset the controllers and reload the applications. Having a look in the Controller-Logfiles I found the error message "Modulebus: Scan time error" and afterwards "FATAL ERROR in .\ErrorHandler\ErrorHandlerImp.cpp: 0x8000". After that the controllers stopped. Does anyone have an idea why this did happen? (Time of the error: 2014-07-27 09:45:39)
I have noticed that the controller failed due to inaccessable modulebus error. and you have lot of message related to modules at position 105 and 106 disappearing and appearing in the list. please make sure the modules are fitted together nicely.
if that doesn't help, please get in touch with your regional supportline who can guide you further on this issue.
and while doing so, report the I/O revisons TB840 revision and serial numbers to identify any known issue.