lostcontrol
Lifetime Supporting Member
Customer called me yesterday, said that their SLC504 had crashed & was not recovering via the normal methods (Run->Program->Run Mode, Power Cycle etc)
The CPU was not visible via RSLinx, therefore not connectable to try & diagnose problem.
Even removing battery overnight did not change things.
The LED's on the CPU are flashing, at what looks like a pattern, with every so often all of the flash (I think there is about 6..?).
The way it happened:
Customer was in middle of doing rounds & taking backup copies of all PLC's on site.
Upon connection to this Particular PLC, the Auto-Configuration that they did was correct & I think they could view the CPU through RSLinx.
Then, the crash happened.
I will mention also, that there is a AIC connected to the Serial Port of this CPU, & this was disconnected for the customer to attempt the backup.
They had a spare 504 16k CPU (the dead one was a 32k), so we installed that, downloaded program & things are not running again.
What we don't know, is what could of caused this & if it is recoverable. Upon power up this morning, I believe it is still flashing the same pattern.
Also, the 16k CPU cannot be connected to with customer laptop. They are running RSLogix500 V7, & the error message that comes up is corrupted processor. I am running V8.1 & can connect no problem.
Is it possible that the firmware of the replacement CPU is newer than what V7 supports?
Or, is their version of RSLogix500 corrupted, therfore this could of potentially caused the CPU crash?
The customer has been connected to this PLC in the last month to make minor changes with no issues, but, that was in the last month...
Cheers
The CPU was not visible via RSLinx, therefore not connectable to try & diagnose problem.
Even removing battery overnight did not change things.
The LED's on the CPU are flashing, at what looks like a pattern, with every so often all of the flash (I think there is about 6..?).
The way it happened:
Customer was in middle of doing rounds & taking backup copies of all PLC's on site.
Upon connection to this Particular PLC, the Auto-Configuration that they did was correct & I think they could view the CPU through RSLinx.
Then, the crash happened.
I will mention also, that there is a AIC connected to the Serial Port of this CPU, & this was disconnected for the customer to attempt the backup.
They had a spare 504 16k CPU (the dead one was a 32k), so we installed that, downloaded program & things are not running again.
What we don't know, is what could of caused this & if it is recoverable. Upon power up this morning, I believe it is still flashing the same pattern.
Also, the 16k CPU cannot be connected to with customer laptop. They are running RSLogix500 V7, & the error message that comes up is corrupted processor. I am running V8.1 & can connect no problem.
Is it possible that the firmware of the replacement CPU is newer than what V7 supports?
Or, is their version of RSLogix500 corrupted, therfore this could of potentially caused the CPU crash?
The customer has been connected to this PLC in the last month to make minor changes with no issues, but, that was in the last month...
Cheers
