Omron RX Series - Page 493

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8 Communications Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
8-3 Explanation of Each Function Code
8
Query
Response
*1 During a broadcast, no response will be sent back.
*2 Note that the coil start number is 0006, which is 1 less than the coil number 0007.
*3 Since the change data comprises both MSB and LSB as a set, make the byte to be an even number by adding
1, even if the byte which actually needs to be changed is an odd number.
A multi-function input terminal is recognized as ON when either the terminal block input or the
communications setting turns ON.
If the Write to Holding Register function is not executed normally, refer to the “Exception Response”
section.
No. Field name Example [hex] Remarks
1
Slave address
*1
05
2 Function code 0F
3
Coil start number (MSB)
*2
00
(Coil address) = (Coil number) – 1
4
Coil start number (LSB)
*2
06
5 Number of coils (MSB) 00
6 Number of coils (LSB) 06
7
Number of bytes
*3
02
8
Change data (MSB)
*3
17 17 hex = 0 0 0 1 0 1 1 1
Input terminal S6 Input terminal S1
9
Change data (LSB)
*3
00
10 CRC-16 (MSB) DB
11 CRC-16 (LSB) 3E
No. Field name Example [hex]
1 Slave address 05
2 Function code 0F
3 Coil start number (MSB) 00
4 Coil start number (LSB) 06
5 Number of coils (MSB) 00
6 Number of coils (LSB) 06
7 CRC-16 (MSB) 34
8 CRC-16 (LSB) 4C