Delta VFD-L Series

VFD-L Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5-42
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VFD-L can be setup to communicate on Modbus networks using one of the
following modes: ASCII (American Standard Code for Information Interchange) or
RTU (Remote Terminal Unit). Users can select the desired mode along with the
serial port communication protocol in Pr. 9-04.
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Code Meaning:
ASCII mode:
Each 8-bit data is the combination of two ASCII characters. For example, a 1-byte
data: 64 Hex, shown as ‘64’ in ASCII, consists of ‘6’ (36Hex) and ‘4’ (34Hex).
C
haracter ‘0’ ‘1’ ‘2’ ‘3’ ‘4’ ‘5’ ‘6’ ‘7’
A
SCII code 30H 31H 32H 33H 34H 35H 36H 37H
C
haracter ‘8’ ‘9’ ‘A’ ‘B’ ‘C’ ‘D’ ‘E’ ‘F’
A
SCII code 38H 39H 41H 42H 43H 44H 45H 46H
RTU mode:
Each 8-bit data is the combination of two 4-bit hexadecimal characters. For example,
64 Hex.
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2.Data Format:
2.1 10-bit character frame (For 7-bit character):
( 7.N.2 : Pr.9-04=0)
( 7.E.1: Pr.9-04=1)
Start
bit
0
1
2
3
4
5
6
Stop
bit
7-bit character
10-bit character frame
( 7.O.1:Pr.9-04=2)
Odd
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
7-bit character
10-bits character frame
Even
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
7-bit character
10-bit character frame
Stop
bit