Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 205
Using ControlFLASH to Upgrade Your Operating System Appendix D
To clear this error:
1. Connect the controller's Ethernet port directly to the computer’s Ethernet
port using a crossover cable, or disable or uninstall any firewall VPN or
virus protection software running on the computer.
2. Cycle power to the processor.
3. Restart the firmware upgrade procedure as described in the section Using
ControlFLASH for Firmware Upgrade on page 193.
Communication error during TFTP transfer
This error message is displayed when there is a communication error during
TFTP transfer.
To clear this error:
1. Check your Ethernet connections are intact.
2. Cycle power to the processor.
3. Restart the firmware upgrade procedure as described in the section Using
ControlFLASH for Firmware Upgrade on page 193
4. If the error still persists, connect the controller's Ethernet port directly to
the computer’s Ethernet port using a crossover cable, and then repeat from
step 2.
Missing or Corrupt OS state
The Boot Firmware runs the controller in this state.
When the controller is in this state, the controller shows either one of the
following:
ATTENTION: Do not interrupt the flash procedure, once you have
begun to download the firmware. If the flash procedure is
interrupted the controller will be in a Missing or Corrupt OS state
on the next power up.
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