9 Communications Functions
9 - 16
High-function General-purpose Inverter RX2 Series User’s Manual
Query
Response
*1. During a broadcast, no response will be sent back.
*2. Note that the coil start number is 0004, which is 1 less than the coil number 0005.
*3. Since the change data comprises both MSB and LSB as a set, make the byte to be an even number by add-
ing 1, even if the byte which actually needs to be changed is an odd number.
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 Exception Response on page
9-18.
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
04
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 6 Input terminal 1
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) 04
5 Number of coils (MSB) 00
6 Number of coils (LSB) 06
7 CRC-16 (MSB) 34
8 CRC-16 (LSB) 4C
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