I have been attempting to reload firmware version 2.20 into two CMM321's without success. These are -EF and -DE versions with AAUI ports, which I use. These modules both assume the software load state automatically several seconds after being powered up (four lights flashing). The Winloader connects to the module, but I get a message:
"Unable to erase FLASH memory on target. Update error: bad request status"
Some background
I decided to attempt to reinstall firmware after both modules booted up with an OK light, but no LAN light activity even though it would normally be happening. On other, good modules I get a flashing LAN light in the same PLC.
The CPU is a CPU351. I'm running winloader on Windows 8 through a USB-Serial converter and an RS-232/485 converter. This setup works well when loading programs into the CPU351 via the RS485 port.
I see in GFK-1541 that removing an AAUI connnector when running can blow to AAUI fuse. I think I did that out of ignorance. Would this not result in a lit OK light and no LAN light? If so, can the fuse be fixed?
Any help on this would be appreciated.
-- Vic Grappone
"Unable to erase FLASH memory on target. Update error: bad request status"
Some background
I decided to attempt to reinstall firmware after both modules booted up with an OK light, but no LAN light activity even though it would normally be happening. On other, good modules I get a flashing LAN light in the same PLC.
The CPU is a CPU351. I'm running winloader on Windows 8 through a USB-Serial converter and an RS-232/485 converter. This setup works well when loading programs into the CPU351 via the RS485 port.
I see in GFK-1541 that removing an AAUI connnector when running can blow to AAUI fuse. I think I did that out of ignorance. Would this not result in a lit OK light and no LAN light? If so, can the fuse be fixed?
Any help on this would be appreciated.
-- Vic Grappone