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E.24
SEL-787 Relay
Instruction Manual
Date Code 20081022
Modbus RTU Communications
Modbus Register Map
Transformer Differential (Xfmr Differential)
298 (R/W)
XFMR DIFF ENABLE
0
1
1
398
0 = N
1 = Y
299 (R/W)
WDG1 CURR TAP
A
10
3100
100
0.01
399
300 (R/W)
WDG2 CURR TAP
A
10
3100
100
0.01
400
301 (R/W)
OPERATE CURR LVL
pu
10
100
30
0.01
401
302 (R/W)
87A ENABLE
0
1
1
402
0 = N
1 = Y
303 (R/W)
DIFF CURR AL LVL
pu
5
100
15
0.01
403
304 (R/W)
DIFF CURR AL DLY
sec
10
1200
50
0.1
404
305 (R/W)
RESTRAINT SLOPE1
%
5
90
25
1
405
306 (R)
Reserved
0
0
0
406
307 (R/W)
RESTRAINT SLOPE2
%
5
90
70
1
407
308 (R/W)
RES SLOPE1 LIMIT
pu
10
200
30
0.1
408
309 (R/W)
UNRES CURR LVL
pu
10
200
100
0.1
409
310 (R/W)
PCT2 ENABLE
0
1
1
410
0 = N
1 = Y
311 (R/W)
2ND HARM BLOCK
%
5
100
15
1
411
312 (R/W)
PCT4 ENABLE
0
1
1
412
0 = N
1 = Y
313 (R/W)
4TH HARM BLOCK
%
5
100
15
1
413
314 (R/W)
PCT5 ENABLE
0
1
1
414
0 = N
1 = Y
315 (R/W)
5TH HARM BLOCK
%
5
100
35
1
415
316 (R/W)
TH5 ENABLE
0
1
0
416
0 = N
1 = Y
317 (R/W)
5TH HARM AL LVL
pu
2
320
10
0.01
417
318 (R/W)
5TH HARM AL DLY
sec
0
1200
10
0.1
418
319 (R/W)
HARMONIC RESTRNT
0
1
1
419
0 = N
1 = Y
320 (R/W)
HARM BLOCK
0
1
0
420
0 = N
1 = Y
321 (R)
Reserved
0
0
0
421
Restricted Earth Fault
322 (R/W)
POL QTY FROM WDG
0
3
0
422
0 = OFF
1 = 1
2 = 2
3 = 12
323 (R/W)
REF1 CURR LEVEL
pu
5
300
25
0.01
423
Table E.32
Modbus Register Map
a
(Sheet 3 of 38)
Modbus Register
Address
b
Name / Enums
Units
Min
Max
Def
Scale
Factor
DeviceNet
Parameter
Numbers
Summary of Contents for SEL-787
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