Specifications

65
Schneider Electric
The Modbus Protocol (continued)
Write a bit: function 5
b Query.
bit forced to 0_ write 0
bit forced to 1_ write FF
b Response.
Note: If the slave number is 00, all slaves force the values and do not transmit a
response.
Example:
Force bit 210 of slave no. 2 to 1.
Write a word: function 6
b Query.
b Response.
Note: If the slave number is 00, all slaves force the values and do not transmit a
response.
Example:
Write the value 1000 in address word 810 of slave no. 1.
The response frame is identical to the query
frame.
E52368E52368E52369
Slave no. 5
Address of the bit Value of the bit CRC 16
MSB* LSB*
1 b
y
te 1 b
y
te 2 b
y
tes 1 b
y
te 2 b
y
tes
0
1 b
y
te
LSB* MSB*
Slave no. 5
Address of the bit Value of the bit CRC 16
MSB* LSB*
0
LSB* MSB*
02 05 02 10
CRC 16
FF 00
The response frame is identical to the query
frame.
E52370E52370E52371
1 byte 1 byte 2 bytes 2 bytes2 bytes
MSB* MSB* LSB*LSB* LSB* MSB
*
Slave no. 6
Address of the word CRC 16Value of the word
MSB* MSB* LSB*LSB* LSB* MSB
*
Slave no. 6
Address of the word CRC 16Value of the word
CRC 16
01 06 810 1000
Guide to Integration
Modbus / Jbus