7-10 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TARGETS MENU CHAPTER 7: COMMANDS AND TARGETS
7
• Latched target message: No.
• Description of problem: No PTP enabled port has good PTP signal input.
• How often the test is performed: Activated when no acceptable signal is being received.
• What to do: Ensure the following:
– The Ethernet cable(s) are properly connected.
– At least one PTP grandmaster-capable clock is functioning.
– If strict PP is enabled, that entire network is PP compliant.
– The network is delivering PTP messages to the relay.
• 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 that Ethernet cable(s) are properly connected. Check that configuration for the SNTP server
corresponds to the actual server settings. Check connectivity to the server (ping the server IP address.
• 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.
• Latched target message: No.
• Description of problem: A data item in a configurable GOOSE data set is oscillating.
• How often the test is performed: Upon scanning of each configurable GOOSE data set.
• What to do: The “xxx” text denotes the data item that has been detected as oscillating. Evaluate all logic pertaining to
this item.
• Latched target message: No.
• Description of problem: Any device settings were changed over any available interface.
• How often the test is performed: On any setting changes, when new settings were written to device.
• What to do: Verify that the setting change was legitimate and essential for proper functioning of the protection and
control system.
• Latched target message: No.
• Description of problem: The front panel is not communicating with the CPU module.
MAINTENANCE ALERT:
**Bad PTP Signal**
MAINTENANCE ALERT:
SNTP Failure
MAINTENANCE ALERT:
4L Discrepancy
MAINTENANCE ALERT:
GGIO Ind xxx oscill
MAINTENANCE ALERT:
Setting Changed
MAINTENANCE ALERT:
Front Panel Trouble
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