Omron SYSDRIVE MX SERIES User Manual page 163

Query
No. Field name
*
1 Slave address
2 Function code
3 Coil start number (MSB)
4 Coil start number (LSB)
5 Change data (MSB)
6 Change data (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
* There is no response for broadcasting.
Refer to "<Exception Response>" (page 4-74) if writing into the coil cannot be performed normally.
<Writing Into the Holding Register [06h]>
Writes data into the specified holding register.
(Example)
Write 50 Hz into the Inverter with slave address 5 as multi-step speed reference 0 (A020).
The data resolution of the holding register "003Ah" of multi-step speed reference 0 (A020) is 0.1 Hz.
To set 50 Hz, set the change data to "500 (1F4h)".
Query
No. Field name
*
1 Slave address
2 Function code
Register start number
3
(MSB)
Register start number
4
(LSB)
5 Change data (MSB)
6 Change data (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
* There is no response for broadcasting.
Refer to "<Exception Response>" (page 4-74) if writing into the holding register cannot be
performed normally.
<Loopback Test [08h]>
Used to check the communications between master and slave. A random value can be used for test
data.
Response
Example
(HEX)
0 A
05
00
01
FF
00
DC
81
Response
Example
(HEX)
05
06
00
3 A
01
F4
A8
54
4-2 Function Mode
No. Field name
1 Slave address
2 Function code
3 Coil start number (MSB)
4 Coil start number (LSB)
5 Change data (MSB)
6 Change data (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
No. Field name
1 Slave address
2 Function code
Register start number
3
(MSB)
Register start number
4
(LSB)
5 Change data (MSB)
6 Change data (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
Example
(HEX)
0 A
05
00
01
FF
00
4
DC
81
Example
(HEX)
05
06
00
3 A
01
F4
A8
54
4-72