Chapter 4 Parameters

RTU mode:

 

 

 

 

 

Command message:

 

Response message:

 

Address

01H

 

Address

01H

 

Function

10H

 

Function

10H

 

Starting data

05H

 

Starting data address

05H

 

address

00H

 

Number of data

00H

 

Number of data

00H’

 

00H

 

(count by word)

02H

 

(count by word)

02H

 

Number of data

04

 

CRC Check Low

41H

 

(count by byte)

 

 

 

 

 

The first data

13H

 

CRC Check High

04H

 

content

88H

 

 

 

 

The second data

0FH

 

 

 

 

content

A0H

 

 

 

 

CRC Check Low

4DH

 

 

 

 

CRC Check High

D9H

 

 

 

3.4Check sum

ASCII mode:

LRC (Longitudinal Redundancy Check) is calculated by summing up, module 256, the values of the bytes from ADR1 to last data character then calculating the hexadecimal representation of the 2’s-complement negation of the sum.

For example, reading 1 word from address 0401H of the AC drive with address 01H.

STX

Address 1

Address 0

Function 1

Function 0

Starting data address

Number of data

‘:’

‘0’

‘1’

‘0’

‘3’

‘0’

‘4’

‘0’

‘1’

‘0’

‘0’

‘0’

‘1’

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11

4-121

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Image 174
Delta Electronics VFD-E manual A0H, 4DH, D9H