Protection
Modbus
SKF Multilog On-Line System IMx-M
2 - 195
User Manual
Imported (Write Single) Modbus Registers
An IMx-M protection part Modbus slave has registers that can be written from the
Modbus master.
Notes on Implementation
Modbus registers translate according to the table below.
The write single function code is 0x06.
The read function code is 0x03 (for registers with read/write access).
Table 2-42: Imported (write single) Modbus registers.
Imported (Write Single) Modbus Registers
Register
number
(1)
Access
Function
Definition
257
Write-only Set disarm slot (same as
register 264)
1 = disarm
0 = arm
258
Read-
Write
(5)
Set disarm analog ch 1 to
16
(2)
MSB = Ch 16, LSB = Ch 1
1 = disarm
0 = arm
259
Read-
Write
(5)
Set trip multiply slot
(6)
1 = enable slot TM
0 = disable slot TM
260
Read-
Write
(5)
Set trip multiply analog ch
1 to 16
(2)
MSB = Ch 16, LSB = Ch 1
1 = TM active
0 = TM not active
261
Read-
Write
(5)
Set latching reset
(4)
1 = reset latching alarms / relays
0 = do nothing
262
Read-
Write
(5)
Set disarm digital ch 1 to
8
(3)
Bit 7 = Ch 8, LSB (Bit 0) = Ch 1
1 = disarm
0 = arm
263
Read-
Write
(5)
Set digital peak (slot)
reset
(4)
1 = reset digital peak
0 = do nothing
264
Read-
Write
(5)
Set disarm slot (same as
register 257)
1 = disarm
0 = arm
265
Read-
Write
(5)
Reset latched Sensor
Faults and/or latched
relays on an individual
PRM/RLM slave MCU,
level
(4) (7)
.
Bits 7 to 0 (latched sensor faults)
MSB (bit 7) = Ch 15 and 16,
LSB (bit 0) = Ch 1 and 2
Bits 15 to 8 (latched relays)
MSB (bit 15) = Relay 29 to 32,
LSB (bit 8) = Relay 1 to 4
1 = reset latching faults / relays
0 = do nothing