TECO e510 series - Read the Data in the Holding Register [03 H]

App3-8
4.3Read the data in the holding register [03H]
Master unit reads the contents of the holding register with the continuous number for the
specified
quantity.
Note:1、Limit number of read data，RTU: 37，ASCII:17.
2、Can only Continuous read the address of the same Group
3、Read data Quantity≥1.
(Example) Read the SLAVE station No:01 ,E510 drive’s frequency command.
ASCII Mode
Instruction Message Response Message (Normal) Response (Fault)
3AH STX 3AH STX 3AH STX
30H
Node Address
30H
Node Address
30H
Node Address
31H 31H 31H
30H
Function
Code
30H
Function Code
38H
Function
Code
33H 33H 33H
32H
Start
Address
30H
DATA Number
35H
Error Code
35H 32H 32H
32H 31H
First
holding
register
?
LRC CHECK
33H 37H ?
30H
Quantity
37H 0DH
END
30H 30H 0AH
30H ?
LRC CHECK
31H ?
?
LRC CHECK
0DH
END
? 0AH
0DH
END
0AH
RTU Mode
Instruction Message Response Message (Normal) Response(Fault)
Node Address 01H Node Address 01H Node Address 01H
Function Code 03H Function Code 03H Function Code 83H
Start
Address
High
25H DATA Number 02H Error Code 52H
Low
23H
First
holding
register
High
07H
CRC-16
High
C0H
Quantity
High
00H
Low
D0H
Low
CDH
Low
01H
CRC-16
High
BBH
CRC-16
High
7EH
Low
E8H
Low
CCH