Omron NV3Q Series, Connection Manual

Page: 128 / 145

104
Modbus Slave (RTU Mode)
Section 11-1
Function Code 05: Write single internal bit
■ Commands
■
Responses
The response will contain the same message as the command.
PT slave
address Function
code
05 hex Bit address,
upper byte Bit address,
lower byte Status
specification,
upper byte Status
specification,
lower byte Error check,
upper byte Error check,
lower byte
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
PT slave
address Function
code
05 hex Bit address,
upper byte Bit address,
lower byte Status
specification,
upper byte Status
specification,
lower byte Error check,
upper byte Error check,
lower byte
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
Item Function
PT slave address Specify the slave address of the PT to which to send the message.
For slave address 20, specify 14 hex.
Function code Specify 05 hex.
Bit address Specify the Internal bit address to write in hexadecimal.
For GR173, specify 01 hex, 13 hex.
Status
specification To specify ON, use FF hex (upper byte), 00 hex (lower byte)
To specify OFF, use 00 hex, 00 hex
Error check The CRC-16 values are sent and received.
Additional Information
To convert a GR address in internal memory to a bit address, use the rightmost
digit of the GR address as the rightmost digit of the bit address and convert the
remaining digits from decimal to hexadecimal.
Example:
GRA to 000A
GR1E to 001E
GR153 to 00F3
GR163 to 0103
GR225F to 0FFF