J.9
Date Code 20081022 Instruction Manual SEL-787 Relay
Relay Word Bits
Definitions
LPSEC Direction of the upcoming leap second. During the time that LPSECP is asserted, if LPSEC is
asserted, the upcoming leap second is deleted; otherwise, the leap second is added.
105
LPSECP Leap second pending. 105
LT01–LT08 Latch bits 1through 8. 58
LT09–LT16 Latch bits 09 through 16. 59
LT17–LT24 Latch bits 17 through 24. 60
LT25–LT32 Latch bits 25 through 32. 61
OC1 Open command. Asserts when serial port command Open Breaker1 or Front Panel or Modbus/
DeviceNet Open Breaker1 command is issued.
34
OC2 Open command. Asserts when serial port command Open Breaker2 or Front Panel or Modbus/
DeviceNet Open Breaker2 command is issued.
34
ORED50T Logical OR of all the instantaneous overcurrent elements Tripped outputs. 9
ORED51T Logical OR of all the time overcurrent elements Tripped outputs. 9
OTHALRM Other Temperature Alarm. OTHALRM asserts when any healthy other RTD temperature
exceeds its alarm set point.
18
OTHTRIP Other RTD temperatures exceed their trip set points. 18
OUT101–OUT103 SEL
OGIC control equation for contact outputs OUT101 through OUT103. 19
OUT301–OUT304 SEL
OGIC control equation for contact outputs OUT301 through OUT304 (available only with
optional I/O module).
19
OUT401–OUT404 SEL
OGIC control equation for contact outputs OUT401 through OUT404 (available only with
optional I/O module).
20
OUT501–OUT504 Control equation for contact outputs OUT501 through OUT504 (available only with optional
I/O module).
20
PASEL Ethernet Port A is selected for communications. 26
PB01 Front-panel pushbutton 1 bit (asserted when PB01 is pressed). 38
PB01_PUL Front-panel pushbutton 1 pulse bit (asserted for one processing interval when PB01 is pressed). 38
PB02 Front-panel pushbutton 2 bit (asserted when PB02 is pressed). 38
PB02_PUL Front-panel pushbutton 2 pulse bit (asserted for one processing interval when PB02 is pressed). 38
PB03 Front-panel pushbutton 3 bit (asserted when PB03 is pressed). 38
PB03_PUL Front-panel pushbutton 3 pulse bit (asserted for one processing interval when PB03 is pressed). 38
PB04 Front-panel pushbutton 4 bit (asserted when PB04 is pressed). 38
PB04_PUL Front-panel pushbutton 4 pulse bit (asserted for one processing interval when PB04 is pressed). 38
PB1A_LED SEL
OGIC control equation: drives LED PB1A. 39
PB1B_LED SEL
OGIC control equation: drives LED PB1B. 39
PB2A_LED SEL
OGIC control equation: drives LED PB2A. 39
PB2B_LED SEL
OGIC control equation: drives LED PB2B. 39
PB3A_LED SEL
OGIC control equation: drives LED PB3A. 39
PB3B_LED SEL
OGIC control equation: drives LED PB3B. 39
PB4A_LED SEL
OGIC control equation: drives LED PB4A. 39
PB4B_LED SEL
OGIC control equation: drives LED PB4B. 39
PBSEL Ethernet Port B is selected for communications. 26
PHDEM Phase current demand pickup. 41
PMDOK Assert if data acquisition system is operating correctly. 25
Table J.2 Relay Word Bit Definitions for the SEL-787 (Sheet 6 of 9)
Bit Definition Row
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