Hitachi SJ Series, User Manual

Page: 507 / 786

14-16
Chapter 14 RS485 Communication
14.4.6 Writing to multiple coils [0Fh]
• Rewrite consecutive multiple coils.
(Example)
To change the state of input terminal functions from 1 to 6
of the inverter with slave address 5.
Query
Field Name Example (HEX)
1 Slave address *1) 05
2 Function code 0F
3 Coil starting No. (high) *2) 00
4 Coil starting No. (low) *2) 06
5 Number of coils (high) 00
6 Number of coils (low) 06
7 Bytes *3) 02
8 Data to be changed (high) *3) 17
9 Data to be changed (low) *3) 00
10 CRC-16 (high) DB
11 CRC-16 (low) 3E
*1) When a broadcasting is performed, a response is not
returned.
*2) Note that the value of starting number is one less than
the No.
*3) Even when the number of bytes required to be
changed is odd, add 1 to the number to make it even
because the data to be changed will consist of higher
order and lower order bytes as a set.
• When a writing to multiple coils cannot be executed
normally, see “3.9 Exceptional Responses”.
The state of input terminals are as shown below.
Response
Field Name Example (HEX)
1
Slave address 05
2
Function code 0F
3
Coil starting No. (high) 00
4
Coil starting No. (low) 06
5
Number of coils (high) 00
6
Number of coils (low) 06
7
CRC-16 (high) 34
8 CRC-16 (low) 4C
Input terminal No. 1 2 3 4 5 6
Coil No. 7 8 9 10 11 12
Terminal state ON ON ON OFF ON OFF
!
A