Armstrong 4280 - Page 21

installation &
operating instructions
Design Envelope 4200h & 4280
End Suction Horizontal Pumping Units
21
function code
start
address
modbus
register
description
# of
registers
change
during
operation
data
type
unit notesread write
0×01 0×03 0×05 0×06
Counters
x 275 276
Total pump
running hours
2 n/a uint32 1 h
x x 277 278
Trip pump
running hours
2 n/a uint32 1 h
Writing 0 to this register resets
the counter.
x 279 280
Total controller
running hours
2 n/a uint32 1 h
x 281 282
Present
controller
running hours
2 n/a uint32 1 h
The running hours since the con-
troller was powered on.
x 283 284
Total pump
running kWh
counter
2 n/a uint32 1 kWh
x x 285 286
Trip pump
running kWh
counter
2 n/a uint32 1 kWh
Writing 0 to this register rests the
counter.
x 287 288
Total btu
counter
2 n/a uint32 — Not implemented
x x 289 290
Trip btu
counter
2 n/a uint32 — Not implemented
Control Settings
x 300 301 Control mode 1 Yes uint16 —
1 = Parallel
2 = i/o
3 = Remote
4 = Constant flow
5 = Constant pressure
6 = Linear pressure
7 = Quadratic pressure
8 = Quad pressure max.
9 = Quad pressure min.
10 = Quadratic
pressure max/min
x x 301 302 hoa state 1 Yes uint16 —
0 = O
1 = Hand
2 = Auto
x x 302 303
Active
parameters
1 Yes uint16 —
1 = standard
2 = mode 1 (heating mode)
3 = mode 2 (cooling mode)
x x 303 304
Minimum
speed limit
1 Yes uint16 0.1
Units as configured on pump
control module.
x x 304 305
Maximum
speed limit
1 Yes uint16 0.1
Units as configured on pump
control module.
x x 305 306
Hand mode
speed
1 Yes uint16 0.1
Units as configured on pump
control module.
x x 306 307 bms set speed 1 Yes uint16 0.1
Units as configured on pump
control module.
Alarms and Warnings
x 400 401 Alarms 2 n/a uint32 —
Refer to alarms table for bit posi-
tions
x 402 403 Warnings 2 n/a uint32 —
Refer to alarms table for bit posi-
tions
x x 404 405
Acknowledge
Warnings
2 Yes uint32 —
32-bit field corresponding to the
warning field