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Programming 88
Modbus Function Code Details
Reading/Holding Register Contents (03H)
Read the contents of the storage registers only for the specified number of registers. The addresses must be consecutive,
starting from a specified start register. The data content of the storage register are separated into high bytes and low bytes.
The following table shows message examples when reading status signals, error details, data link status, and frequency
references from the slave 2 Drive.
Fig. 66 Function Code 03H Message Example
Command Message
Response Message
(During Normal Operation)
Response Message
(During Error)
Slave Address
02H
Slave Address
02H
Slave Address
02H
Function Code
03H
Function Code
03H
Function Code
83H
Start
Register
High
Byte
00H
Data quantity
08H
Error code
03H
Low
Byte
20H
First Storage
Register
High
Byte
00H
CRC-16
High
Byte
F1H
No. of
Registers
High
Byte
00H
Low
Byte
65H
Low
Byte
31H
Low
Byte
04H
Second
Storage
Register
High
Byte
00H
CRC-16
High
Byte
45H
Low
Byte
00H
Low
Byte
F0H
Third
Storage
Register
High
Byte
00H
Low
Byte
00H
Fourth
Storage
Register
High
Byte
01H
Low
Byte
F4H
CRC-16
High
Byte
AFH
Low
Byte
82H
Содержание E7U
Страница 1: ...E7 Drive Programming Manual Model E7U Document Number TM E7 02...
Страница 140: ...Programming 134 Notes...
Страница 170: ...Parameters A 30 Notes...
Страница 174: ...Factory Default Settings B 4 Notes...