Specifications

73
Schneider Electric
The Modbus Protocol (continued)
Write n consecutive words: function 16
b Query.
b Response.
Example:
Force words 0800 to 0803 of slave no. 1.
(0800) = 0001
(0801) = 0010
(0802) = 0100
(0803) = 1000
b Query.
b Response.
If the slave number is 0, all slaves perform
the write operation but do not return a
response.
E52388E52389E52390
Slave no.
10
Address of
the 1st word
to force
No. of
words to
force
CRC 16
1 byte 1 byte 2 bytes 2 bytes2 bytes
No. of
bytes to
force
Value of
words to
force
1 byte n bytes
1st word forced Last word to force
MSB* LSB* MSB* LSB* LSB* MSB*
1
X 123
1
N 246
Slave no.
10
Address of the
1st word forced
No. of words
forced
CRC 16
1 byte 1 byte 2 bytes 2 octets2 bytes
CRC 16
01 10 0800 0004 08 0001 0010 0100 1000
CRC 16
01 10 0800 0004
Guide to Integration
Modbus / Jbus