Target Messages; Relay Self-Tests - GE B90 Instruction Manual

CHAPTER 7: COMMANDS AND TARGETS

7.2.1 Target messages

When there are no active targets, the first target to become active causes the display to immediately default to that
message. If there are active targets and the user is navigating through other messages, and when the default message
timer times out (i.e. the keypad has not been used for a determined period of time), the display again defaults back to the
target message.
The range of variables for the target messages is described below. Phase information is included if applicable. If a target
message status changes, the status with the highest priority displays.
Table 7-1: Target message priority status
Priority Active status
1 OP
2 PKP
3 LATCHED
If a self test error is detected, a message appears indicating the cause of the error. For example UNIT NOT PROGRAMMED
indicates that the minimal relay settings have not been programmed.

7.2.2 Relay self-tests

7.2.2.1 Description
The relay performs a number of self-test diagnostic checks to ensure device integrity. The two types of self-tests (major
and minor) are listed in the following tables. When either type of error occurs, the Trouble LED Indicator turns on and a
target message displays. All errors record an event in the event recorder. Latched errors can be cleared by pressing the
key, providing the condition is no longer present.
RESET
Major self-test errors also result in the following:
• The critical fail relay on the power supply module de-energizes
• All other output relays de-energize and are prevented from further operation
• The front panel In Service LED indicator turns off
• A RELAY OUT OF SERVICE event is recorded
To view error messages in EnerVista software:
1. Access Actual Values > Records > Event Records.
7.2.2.2 Major self-test error messages
The major self-test errors are outlined in this section.
INCOMPATIBLE H/W:
Contact Factory (xxx)
• Latched target message: Yes.
• Description of problem: One or more installed hardware modules is not compatible with the B90 order code.
• How often the test is performed: Module dependent.
• What to do: Contact the factory and supply the failure code noted in the display. The "xxx" text identifies the failed
module (for example, F8L).
EQUIPMENT MISMATCH:
with 2nd line detail
• Latched target message: No.
• Description of problem: The number or type of installed hardware modules does not match the order code stored in
the B90.
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
Description
element operated and still picked up
element picked up and timed out
element had operated but has dropped out
TARGETS MENU
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