GE L90 Instruction Manual page 489

7 COMMANDS AND TARGETS
• Latched target message: No.
• Description of problem: The Ethernet connection has failed for the specified port.
• How often the test is performed: Every five seconds.
• What to do: Check the Ethernet port connection on the switch.
MAINTENANCE ALERT:
**Bad IRIG-B Signal**
• Latched target message: No.
• Description of problem: A bad IRIG-B input signal has been detected.
• How often the test is performed: Monitored whenever an IRIG-B signal is received.
• What to do: Ensure the following:
– The IRIG-B cable is properly connected.
– Proper cable functionality (that is, check for physical damage or perform a continuity test).
– The IRIG-B receiver is functioning.
– Check the input signal level (it may be less than specification).
If none of these apply, then contact the factory.
MAINTENANCE ALERT:
Port ## Failure
• Latched target message: No.
• Description of problem: An Ethernet connection has failed.
• How often the test is performed: Monitored every five seconds.
• What to do: Check Ethernet connections. Port 1 is the primary port and port 2 is the secondary port.
MAINTENANCE ALERT:
SNTP Failure
• Latched target message: No.
• Description of problem: The SNTP server is not responding.
• How often the test is performed: Every 10 to 60 seconds.
• What to do: Check SNTP configuration and network connections.
MAINTENANCE ALERT:
4L Discrepancy
• Latched target message: No.
• Description of problem: A discrepancy has been detected between the actual and desired state of a latching contact
output of an installed type "4L" module.
• How often the test is performed: Upon initiation of a contact output state change.
• What to do: Verify the state of the output contact and contact the factory if the problem persists.
MAINTENANCE ALERT:
GGIO Ind xxx oscill
• Latched target message: No.
• Description of problem: A data item in a configurable GOOSE data set is oscillating.
GE Multilin L90 Line Current Differential System
7.2 TARGETS
7
7-9