ERL 8700/BUS, User Manual

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Appendix D Event Messages
Appendix D-4 B-PRO User Manual 8700 D01908R02.12
The Self Check Fail signal, which is available in the Output Matrix, TUI me-
tering and SCADA, can be used to signal an alarm. Note that if this signal is
mapped to an output contact, the contact which it is mapped to will only be
closed for an alarm condition. If the relay is in the Block condition, the Relay
Inoperative contact must be used to signal an alarm.
The status of the Self Check Fail is available through the SCADA services pro-
vided by the B-PRO. The digital signal Self Check Fail will indicate that DSP
has detected a continuous dc level and the analog metering value Self Check
Fail Parameter is used to indicate which condition, Alarm or Block. The failure
types and which analog values they are associated with are described in the ta-
ble below. Both signals are available in DNP and Modbus.
The Alarm condition is allowed to reset if the continuous dc level drops below
the pickup level. The Block condition has no reset level. If power is cycled to
the relay it will go into its normal state until the continuous dc level is detected
again.
Action Condition
Alarm Block
Relay Functional LED off X
Service Required LED on X X
Self Check Fail Signal high X X
Relay Inoperative Contact closed X
Output Contacts held open X
Event Log Message X X
Status available through SCADA X X
Point Value Condition
0 Normal
1 Alarm
2 Block
3 Alarm has evolved to block
Note: Self Check Fail appears as "Aux. Failure Alarm" in the settings
versions before v2.
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