Fanuc 911 RAM PARITY ERROR Troubleshooting
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Last week we had a customer who was running an RNC 16 STAR 1990 vintage machine which failed so he decided to replace the main A16B-1010-0280 motherboard. His original problem was that he was receiving a 401 [VRDY Off] Error which then led to a 911 Error. When he replaced the A16B-1010-0280 motherboard, the machine would go directly to the 911 Error.
The first thing we checked for was to make sure that he transferred over all of the EEPROM modules from his original board to the replacement board, which he did. Since that wasn’t the issue, we double checked on the 911 Error, which shows as a RAM PARITY ERROR in the manual. The main cause of this error is an issue with the memory in the unit, which is caused by the memory board failing or losing the parameters in the system.
To check to see if the memory board was causing it or not, you can turn the control off, reset it, and delete the parameters. If this clears the alarm, the control would come up with a different series of servo alarms meaning that the parameters need to be reloaded. If the Fanuc 911 Error comes back it would mean that there is a problem with the memory board which needs to be replaced. Before trying any of this, be sure to confirm that you have all of the parameters saved so you can load them back in. Check out our article on IT and Robotics here.
Once the 911 Error was cleared, the customer was able to load the parameters back on to get the machine up and running.
Updated on March 4, 2020 by Brian Hughes
I HAVE INSTALLED A NEW AXIS CONTROL BOARD AND NOW HAVE NO PARAMETERS IN THE MACHINE.
HOW DO I LOAD THE PARAMETERS QUICKLY?
MUST I ENTER THEM ONE BY ONE?
I DO HAVE ANOTHER MACHINE THAT WILL HOPEFULLY GIVE ME THE PARAMETERS I NEED.
Can we replace the controller from existing contoler GE Fanuc series O-T to latest version
I’m attempting to download SRAM back up of my variety of fanuc controls. Some will work with 64 MB card, but some won’t. I’ve got a 2MB card but now I keep getting “DRAM or SRAm Parity ” errors. Could you please help me figure this out?
William,
I still use an old 512K card, some of the older controls will not accept a 2MB card.