Hitachi SJ Series, User Manual

Page: 504 / 786

14-13
Chapter 14 RS485 Communication
14.4.3 Writing to coil [05h]
• Perform writing to a coil.
Coil states change as shown in the table at the right.
(Example)
To give an operation command to the inverter with slave
address 10.
• You need to set the operation command selection
[AA111] to 03 in advance to operate using a Modbus
command.
• Coil No. for operation command is “1”.
Query
Field Name Example (HEX)
1 Slave address *1) 0A
2 Function code 05
3 Coil starting No. (high) *2) 00
4 Coil starting No. (low) *2) 00
5 Data to be changed (high) FF
6 Data to be changed (low) 00
7 CRC-16 (high) 8D
8 CRC-16 (low) 41
*1) When a broadcasting is performed, a response is not
returned.
*2) Note that the shown value is one less than starting
number. For coil No. 0001, specify 0000(=0001-1).
• When a writing to a coil cannot be executed normally,
see “3.9 Exceptional Responses”.
Coil state
OFF
→ON
ON
→OFF
Data to be changed (high) FFh 00h
Data to be changed (low) 00h 00h
Response
Field Name Example (HEX)
1 Slave address 0A
2 Function code 05
3 Coil starting No. (high) 00
4 Coil starting No. (low) 00
5 Data to be changed (high) FF
6 Data to be changed (low) 00
7 CRC-16 (high) 8D
8 CRC-16 (low) 41
!
A