Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 72

Write single coil
Writes a value (ON/OFF) to one coil.
Supports the MODBUS serial communication and MODBUS/TCP communication.
■Request message format (Master  Slave)
■Response message format (Slave  Master)
(When completed normally)
The slave returns the request message received from the master without change.
(When completed with an error)
*1 Exception and error codes are stored in special registers in the case of error completion. Refer to the following sections for the storage
location, confirmation methods, and other detailed contents.
MODBUS serial communication: Page 35 Related Devices
MODBUS/TCP communication : Page 58 Related Devices
Write single register
Writes a value to one holding register.
Supports the MODBUS serial communication and MODBUS/TCP communication.
■Request message format (Master  Slave)
■Response message format (Slave  Master)
(When completed normally)
The slave returns the request message received from the master without change.
(When completed with an error)
*1 Exception and error codes are stored in special registers in the case of error completion. Refer to the following sections for the storage
location, confirmation methods, and other detailed contents.
MODBUS serial communication: Page 35 Related Devices
MODBUS/TCP communication : Page 58 Related Devices
APPX
70
Appendix 3 The frame specifications
Function code
Function Coil number
code (0000H to
FFFFH)
(05H)
(H)
Function code
Function
code
(85H)
Function code
Function
Holding register number
code
(0000H to FFFFH)
(06H)
(H)
Function code
Function
code
(86H)
Data
ON/OFF specification
0000H: OFF
FF00H: ON
(L) (H)
Data
Exception
code *1
Data
Write data
(0000H to FFFFH)
(L) (H)
Data
Exception
code
*1
(L)
(L)