Issue
MNB Controller firmware upgrade failed, which resulted in the device showing a blinking-red status LED.
Product Line
TAC IA Series
Environment
- I/A Series MNB Controllers (ASC) (All firmware revisions)
- Note: This does not apply to the MNB-1000
Cause
A blinking-red status LED means the MNB controller is in Boot Loader mode and it cannot reboot. It is now a "slave" unit, listening to traffic, not initiating communication.
Resolution
- Using the WorkPlace Commissioning Tool, click on the File pull-down menu and select "Add MS/TP Slave". If asked to select from IP, Ethernet or MS/TP, select MS/TP. (Note: It's a good idea to have the controller isolated from the trunk, so the firmware upgrade process runs less risk of being interrupted.)
- At the prompt for the address, enter the address set on the controller DIP switch. The controller should get added to the list. If it is already in the list, a message will indicate that there's a duplicate address. Answer prompts in such a manner to get the controller added to the list. The 'slave' controller may show up with a blank name.
- Do the firmware upgrade again. This procedure works 80% of the time.
- If the upgrade fails, put the controller into Dedicated Boot Loader Mode.
- Take the controller off the MSTP trunk, set the DIP switch address to 254, cycle power, and try another firmware upgrade (keep it addressed as 254). Following a successful firmware upgrade, set the DIP switch back to the correct controller address and cycle power to the controller.
