4X Registers (M850)

The registers are listed with their Modbus addresses.
The data held at these addresses are Read-Only, Write-Only or Read+Write as indicated below.
4X registers are read using function 03h and written using function 10h.
A sample write packet will look like this:-
[Node][10][start address][No. of Double Registers][Data length in bytes][CRC(2 bytes)]

e.g. To set Node 23h Primary Voltage and Secondary Voltage together:-
[23h][10h][001Ch][0004h(4, 2 byte regs)][08h(2, 4 byte regs)][CRC(2 bytes)]

Modbus Address

Register Address/Name

Mode

40001

(0x00) SYSTEM VOLTAGE

(RO)

40003

(0x02) SYSTEM CURRENT

(R/W)

40005

(0x04) SYSTEM TYPE

(R/W)

40007

(0x06) DEMAND TIME

(R/W)

40009

(0x08) DEMAND STATUS

(RO)

40011

(0x0A) kW.h COUNTER DIVISOR

(R/W)

40013

(0x0C) kVA.h COUNTER DIVISOR

(R/W)

40015

(0x0E) N/A

(N/A)

40017

(0x10) N/A

(N/A)

40019

(0x12) RESET ENERGY

(WO)

40021

(0x14) RESET DEMAND

(WO)

40023

(0x16) N/A

(N/A)

40025

(0x18) N/A

(N/A)

40027

(0x1A) SET NODE ADDRESS

(R/W)

40029

(0x1C) PRIMARY VOLTAGE

(R/W)

40031

(0x1E) SECONDARY VOLTAGE

(R/W)

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40097

(0x60) LOCK ACIA SETTINGS

(WO)