CHAPTER 14: TESTING
SELF-TESTS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
623
UNIT NOT PROGRAMMED
Description: The unit is configured as not programmed.
Severity: Protection is not available
If this message appears, confirm that the unit has the proper settings. Change the Relay
Settings value to “Programmed”.
The minor self-test error messages are indicated in yellow on the annunciator display and
are described below.
AC SLOT F HIGH TEMP
AC SLOT J HIGH TEMP
Description: The ambient temperature is outside the specifications for the AC card in the
indicated slot.
Severity: Relay remains operational.
If this message appears, ensure proper ventilation is provided.
CH 1 DIRECT DEVICE OFF
CH 2 DIRECT DEVICE OFF
Description: A direct device is specified in the configuration but is not connected to the
network. This self-test should occur within 2 seconds of disconnecting the device.
Severity: Protection is available. Direct input/output messaging with the offline device is
not available.
If this message appears, check that all devices that are connected to the direct input/
output network are properly configured. Check the direct input/output wiring.
CH 1 DIRECT RING BREAK
CH 2 DIRECT RING BREAK
Description: The direct input/output settings are configured for a ring, but the connection
is not in a ring. This self-test is asserted approximately 2 seconds after a disconnection
occurs in a ring configuration.
Severity: Protection and direct input/output messaging is available. However, there is no
redundant path available.
If this message appears, check the direct input/output configuration and wiring.
COMMUNICATION CARD TROUBLE
Description: An error has been encountered on the communications module.
Severity: Protection is available.
If this message appears, update the order code to clear the self-test error.
COMM HIGH TRAFFIC
Description: The D90
Plus
is actively limiting IP bandwidth usage.
Severity: Protection is available.
This message indicates that the D90
Plus
is actively limiting bandwidth usage in one or
more Ethernet ports through the network filtering settings.
DELAYED AUTOMATION EXECUTION
Description: Execution of the automation logic is longer than specified.
Severity: Protection is available. Automation logic may not produce expected results.
If this message appears, review the automation logic to confirm correct programming.
Move less critical tasks to an automation block with a slower scan.
FILE SYSTEM TROUBLE
Description: System files are missing on the flash disk during the boot process or files are
deleted or modified after the system was booted.
Severity: Protection is available.
If this message appears, repeat the firmware upgrade process.