Delta Electronics VFD-EL series User Manual

Chapter 4 Parameters|
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4-74 Revision 2016/03, 6ELE, V1.14
 1. Control by PC
A VFD-EL can be set up to communicate in 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.09.04.
Code Description:
The CPU will be about 1 second delay when using communication reset. Therefore, there is at least 1
second delay time in master station.
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).
Character ‘0’ ‘1’ ‘2’ ‘3’ ‘4’ ‘5’ ‘6’ ‘7’
ASCII code 30H 31H 32H 33H 34H 35H 36H 37H
Character ‘8’ ‘9’ ‘A’ ‘B’ ‘C’ ‘D’ ‘E’ ‘F’
ASCII 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.
 2. Data Format
For ASCII:
( 7.N.2)
( 7.E.1)
Start
bit
0
1
2
3
4
5
6
Stop
bit
10-bit character frame
( 7.O.1)
Odd
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
10-bit character frame
Even
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
7-bit character
10-bit character frame
Stop
bit
7-bit character
7-bit character
( 7.N.1)
( 7.E.2)
Start
bit
0
1
2
3
4
5
6
Stop
bit
11-bit character frame
( 7.O.2)
Odd
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
11-bit character frame
Even
parity
Start
bit
0
1
2
3
4
5
6
Stop
bit
7-bit character
9-bit character frame
7-bit character
7-bit character
Stop
bit
Stop
bit

Delta Electronics VFD-EL series Specifications

General

Brand	Delta Electronics
Model	VFD-EL series
Category	Media Converter
Language	English