SMAX MODBUS®
For the complete list of registers accessible using
function code please refer to the “7.1.1 Machine data parameters (Holding
registers)” section on page 59.
Request PDU
Function code
1 byte
10 hex
Starting address
2 bytes
0000 hex to FFFF hex
Quantity of registers
2 bytes
0001 hex to 007B hex
Byte count
1 byte
2 x
N*
Registers value
N*
x 2 bytes
value
*N = Quantity of registers
Response PDU
Function code
1 byte
10 hex
Starting address
2 bytes
0000 hex to FFFF hex
Quantity of registers
2 bytes
1 to 123 (007B hex)
Exception Response PDU
Error code
1 byte
90 hex (= 10 hex + 80
hex)
Exception code
1 byte
01 or 02 or 03 or 04
Here is an example of a request to write the value 00 0A hex (=10) next to the
parameter (register 5) and the value 00 01 hex (= 1
= baud rate 9600 bit/s, parity bit Even) next to the
parameter (register 6).
Request
Response
Field name
(Hex)
Field name
(Hex)
Function
10
Function
10
MAN SMAX MB E 1.2
Modbus® interface
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