AC450 controller- Halt Code 09
one of our customer facing this problem - AC450 controller frquently going with halt code 09 & stopping.
Halt code 09 : Level7 Interrupt:stall alarm. CPU Parity. I have gone through the advant manual it is giving some hints about hardware fault and Overloading of controller (PC programs cyclicity) may cause this error Halt code 09.
Please suggest anyody what are the actions to be taken when the problem repeats again & what are the things to be taken care for resolving this issue.
first thing i have to collect the halt code details from AC450 controller. what are the other things to be taken care..
You need to extract the halt information in offline mode, to be able to determine if the stall is caused by normal overload or by faulty hardware.
When the controller is stalled you must set the start mode selector to off line and make an init twice to be sure, Then P4 is on the display.
If you many an auto or clear init before, the stall information is erased!!!!
Now you need to connect with your local engineering tool in offline symbolic mode, this is made in different ways depending on used engineering tool.
If you have an Engineering tool, using PCI or PU410 Engineering board ou must use the command COSESS after you have booted your tool offline and use alternative
post mortem analysis
You need a physical engineering station and you must use the serial cable , which have 4 wires plus ground two for high speed and two for low speed,
This communication is using the low speed wires.
Use commands LSYSHI, LTSL, LTRQ and LSYSM ALL. and save the information in a text file.
For halt code 09 on the CPU display.
If LSYSHI says $LOSTAL= -1 you have a stall cause by system overload.
If $LOSTAL is 0 or higher the stall may be cause by a hanging Interrupt i.e. from a S100 I/O board (if used), (very unusual)
It is not easy to interpret the details in LSYSHI and with the exception of what I mentioned above you need to consult your local ABB which in their turn must contact R&D via Supportline for intepretation.
Best Regards Jan-Erik