4-165
4-4 Communication Function
4
Func
tions
<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 the base frequency (A003).
The data resolution of the holding register "1203h" of the base frequency (A003) is 1 Hz. To set 50
Hz, set the change data to "50 (0032h)".
If writing into the holding register cannot be performed normally, refer to the "Exception Response"
section.
<Loop-back Test [08h]>
Used to check the communications between master and slave. A random value can be used for test
data.
(Example)
Loop-back test to the Inverter with slave address 1
The diagnostic sub code corresponds only with the query data echo (00h, 00h), not any other
commands.
Query
Response
No.
Field name
Example
(HEX)
No.
Field name
Example
(HEX)
1
Slave address
*1
05
1
Slave address
05
2
Function code
06
2
Function code
06
3
Register start number (MSB)
*2
12
3
Register start number (MSB)
12
4
Register start number (LSB)
*2
02
4
Register start number (LSB)
02
5
Change data (MSB)
00
5
Change data (MSB)
00
6
Change data (LSB)
32
6
Change data (LSB)
32
7
CRC-16 (MSB)
AD
7
CRC-16 (MSB)
AD
8
CRC-16 (LSB)
23
8
CRC-16 (LSB)
23
*1. There is no response for broadcasting.
*2. Note that the start number is reduced by 1.
Query
Response
No.
Field name
Example
(HEX)
No.
Field name
Example
(HEX)
1
Slave address
*
01
1
Slave address
01
2
Function code
08
2
Function code
08
3
Diagnostic sub code (MSB)
00
3
Diagnostic sub code (MSB)
00
4
Diagnostic sub code (LSB)
00
4
Diagnostic sub code (LSB)
00
5
Data (MSB)
Random
5
Data (MSB)
Random
6
Data (LSB)
Random
6
Data (LSB)
Random
7
CRC-16 (MSB)
CRC
7
CRC-16 (MSB)
CRC
8
CRC-16 (LSB)
CRC
8
CRC-16 (LSB)
CRC
* Broadcasting cannot be performed.
Summary of Contents for 3G3RX Series
Page 1: ...Cat No I560 E1 03 USER S MANUAL SYSDRIVE RXSERIES High function General purpose Inverter ...
Page 2: ......
Page 17: ...Chapter 1 Overview 1 1 Functions 1 1 1 2 Appearance and Names of Parts 1 4 ...
Page 22: ......
Page 23: ...Chapter 2 Design 2 1 Installation 2 1 2 2 Wiring 2 6 ...
Page 48: ......
Page 108: ......
Page 324: ......
Page 337: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 1 ...
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Page 437: ...Index ...
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