Read
Packet from master format :
[Node addr][03][Register start addr.(2 bytes)][No of reg(2
bytes)][CRC (2 bytes)]
Response form Slave format :
[Node addr][03][Byte count][Data(byte count bytes)][CRC
( 2 bytes)]
Function 16 (10 hex) - Preset Multiple registers (4X)
These registers contain the system settings and controls.
Register addresses in the M560 at 0, but in keeping with
Modicon Modbus codes, are designated addresses starting
40001.
Write
Packet from master :
[Node addr][10][Register start address(2 bytes)][No of
registers(2 bytes)][Byte count][Data (byte count bytes)]
[CRC (2 bytes)]
Response from slave format :
[Node addr][10][Register start addr.(2 bytes)][No of
registers(2 bytes)][CRC (2 bytes)]
The following table lists the parameter, its Modbus
equivalent address and its address within the M560. Any
Illegal operation will return an Error code.
4X Registers
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:-
49
M560AT~1.PM5
01/08/101, 12:52
49
