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Maintenance
184
840 USE 106 00 January 2003
Startup Errors
LED Display for a
Startup Error
When the Hot Standby system detects a mismatch between the Primary and
Standby controllers, it reports a startup error. The mismatch may be in the
configuration, including segment scheduler, I/O map or designation slide switch
positions. The LEDs display the error pattern. The Ready indicator is a steady green,
while the Com Act indicator blinks.
If the LEDs indicate a startup error and if you have difficulty determining why, you
can access some startup error codes through software. Refer to Chapter 3 of the
Quantum Automation Series Hardware Reference Guide
for details.
Troubleshooting Take the following troubleshooting steps:
Step Action
1 Be sure the designation slide switches on the CHS 110 modules are in opposite
positions.
2 Be sure the configuration tables in the Primary and Standby controllers are
identical.
3 Be sure the segment schedulers in the Primary and Standby controllers are
identical.
4 Be sure the I/O maps in the Primary and Standby controllers are identical.