Sel SEL-421 - Page 581

R.A.11
Date Code 20111215 Reference Manual SEL-421 Relay
Relay Word Bits
Alphabetic
FOP3_09–
FOP3_16
Fast Operate Output Control Bits for Port 3, 09–16 309
FOP3_17–
FOP3_24
Fast Operate Output Control Bits for Port 3, 17–24 310
FOP3_25–
FOP3_32
Fast Operate Output Control Bits for Port 3, 25–32 311
FOPF_01–
FOPF_08
Fast Operate Output Control Bits for Port F, 01–08 296
FOPF_09–
FOPF_16
Fast Operate Output Control Bits for Port F, 09–16 297
FOPF_17–
FOPF_24
Fast Operate Output Control Bits for Port F, 17–24 298
FOPF_25–
FOPF_32
Fast Operate Output Control Bits for Port F, 25–32 299
FREQOK Assert if relay is estimating frequency 217
FSA A-phase sector fault (AG or BCG fault) 43
FSB B-phase sector fault (BG or CAG fault) 44
FSC C-phase sector fault (CG or ABG fault) 44
FSERP1 Fast SER enabled for Serial Port 1 260
FSERP2 Fast SER enabled for Serial Port 2 260
FSERP3 Fast SER enabled for Serial Port 3 260
FSERPF Fast SER enabled for Serial Port F 260
GDEM Zero-sequence demand current picked up 86
GROUND Indicates a ground fault 228
HALARM Hardware alarm 198
ILOP Internal loss-of-potential from ELOP setting 43
IN101–IN107 Main board inputs 100
IN201–IN224 First optional I/O board inputs (if installed) 10–103
IN301–IN324 Second optional I/O board inputs (if installed) 104–106
KEY Transmit permissive trip signal 50
KEY1 Transmit general permissive trip 51
KEY3 Transmit three-phase permissive trip 51
KEYA Transmit A-phase permissive trip (ECOMM=POTT3) 53
KEYB Transmit B-phase permissive trip (ECOMM=POTT3) 53
KEYC Transmit C-phase permissive trip (ECOMM=POTT3) 53
LB01–LB32 Latch bits 88–91
LB_DP01–
LB_DP32
Local Bit Status Display (SEL
OGIC Equation) 288–291
LB_SP01–
LB_SP32
Local Bit Supervision (SEL
OGIC Equation) 284–287
LBOKA Normal M
IRRORED BITS communications Channel A status
while in loopback mode
233
LBOKB Normal M
IRRORED BITS communications Channel B status
while in loopback mode
234
LCBF1 Circuit Breaker 1 load current circuit breaker failure 60
Table A.1 Alphabetic List of Relay Word Bits (Sheet 11 of 21)
Name Description
Row