Siemens SIMOCODE pro Function Manual page 107

Request message frame
Slave
address
1 byte
0x10
Response message frame
Slave address
1 byte
0x10
Note
"Read/Write Multiple Registers" function
The "Read/Write Multiple Registers" function cannot be used for writing parameter values via
Modbus.
Writing of parameter values results in an execution time in SIMOCODE for writing
parameters to the internal memory during which this SIMOCODE cannot respond to a
communication request and/or the command "Read/Write Multiple Registers" cannot be
concluded.
SIMOCODE pro - Communication
Function Manual, 11/2018, A5E40508495002A/RS-AC/003
Function Start
code address
read
operation
1 byte 2 bytes
0x17 0x04 0x00 0x0004
Function code
1 byte
0x17
Number Start Number
of address of
registers write register
(read operation N (write
access) access)
2 bytes 2 bytes 2 bytes
0x00 0x00
0x00 0x01
Number_bytes Data
1 byte Nx2 bytes
0x08 0x00 0x00
Communication
2.3 Modbus communication
Number Data CRC
of bytes (write
(write access)
access)
1 byte Nx2bytes 2 bytes
0x02 0x00
0x24
CRC
2 bytes
0x00 0x00
107