Troubleshooting Control Unit IV Reference Manual
6-18 529-0004 Ver.3
6.6 Troubleshooting setup errors
If you are unable to set up the Control Unit, or if error messages appear during the setup
process, there may be a cabling or powering problem.
1. First, make sure your computer or terminal is connected to COM 3 on the Control Unit,
and that your computer’s port settings are the same as the COM 3 settings (see Chapter 3
for setup procedures).
2. Make sure that you have a valid password to logon to the Control Unit with full-access
privileges. A password is required in order to use the setup command or else the message
Access denied will appear.
3. Reset the Control Unit, or in a redundancy system, turn both units off and then turn them
back on simultaneously (see section 6.4.3 on page 6-10 for instructions). Note the system
screen messages. If the real-time clock displays the message Invalid time or Invalid
date, the Control Unit’s battery may be discharged. Replace the battery (see Chapter 5)
and set the unit’s time and date (see Chapter 3).
4. If you are still unable to set up the Control Unit, contact Electroline’s technical support
department.
6.7 Troubleshooting firmware upgrade errors
If you are unable to upgrade the Control Unit’s firmware, or if error messages appear during
the upgrade, there may be a cabling or setup problem.
1. If you are having communication problems on the PC-to-Control Unit link, check the
port settings and the cabling between the PC running the upgrade software and the
Control Unit’s COM 3 port. You may need to restart Windows in order to free up the
communication port on the PC.
2. If the problem persists, the Control Unit’s firmware may be corrupted and thus will
prevent the upgrade. You must start up the Control Unit in reprogramming mode in order
to upgrade the firmware, which corrects the problem. To do so, turn off the Control Unit,
wait two seconds, then turn it back on. The Control Unit’s P4 jumper is in position 2-3
by default, which forces the Control Unit to check the validity of its firmware and run it
at startup. If the firmware is not valid, the Control Unit then defaults to reprogramming
mode. Try the connection and upgrade program (see Chapter 5) with a valid .HEX file.
The upgrade will correct the corruption.
3. If the upgrade operation fails, you can change the P4 jumper settings in order to bypass
the code validity check. First turn the Control Unit off and unplug the power cord from
the wall outlet.
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