Yaskawa iQpump Controller User Manual - Manual (Page 218)

218 YASKAWA TM.iQp.06 iQpump Controller User Manual
D.2 Modbus Function Code Details
D.2 Modbus Function Code Details
◆ Reading / Holding Register Contents (03H)
Read the contents of the storage register only for specified quantities. The addresses must be consecutive, starting from a specified
address. The data content of the storage register are separated into higher 8 bits and lower 8 bits.
The following table shows message examples when reading status signals, error details, data link status, and frequency references from
the slave 2 drive.
Figure D.6 Function Code 03 H Message Example
◆ Write In Single Holding Register (06H)
Figure D.7 Function Code 06 H Message Example
Command Message
Response Message
(During Normal Operation)
Response Message
(During Error)
Slave Address 02 H Slave Address 02 H Slave Address 02 H
Function Code 03 H Function Code 03 H Function Code 83 H
Start Address
Higher 00 H Data quantity 08 H Error code 03 H
Lower 20 H
1st storage
register
Higher 00 H
CRC-16
Higher F1 H
Quantity
Higher 00 H Lower 65 H Lower 31 H
Lower 04 H
Next storage
register
Higher 00 H
CRC-16
Higher 45 H Lower 00 H
Lower F0 H
Next storage
register
Higher 00 H
Lower 00 H
Next storage
register
Higher 01 H
Lower F4 H
CRC-16
Higher AF H
Lower 82 H
Command Message
Slave address 01 H
Function code 06 H
Upper 00 H Register
Address
Lower 01 H
Upper 00 H Setting
Data Lower 03 H
Upper 98 H
CRC-16
Lower 0B H
Response Message
(During Normal Operation)
Slave address 01 H
Function code 06 H
Upper 00 H Register
Address Lower 01 H
Upper 00 H Setting
Data Lower 03 H
Upper 98 H
CRC-16
Lower 0B H
Response Message
(During Error)
Slave address 01 H
80H + Function Code 86 H
Error code 21 H
Upper 82 H
CRC-16
Lower 78 H