Delta VFD-EL-W Series - Page 127

Chapter 4 Parameters｜VFD-EL-W
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6: 8, N, 1 for RTU
7: 8, E, 2 for RTU
8: 8, O, 2 for RTU
9: 7, N, 1 for ASCII
10: 7, E, 2 for ASCII
11: 7, O, 2 for ASCII
 Computer Link: When using the RS-485 serial communication interface, you must specify each
drive’s communication address in Pr.09.00. The computer then implements control using the
drives’ individual addresses.
 The VFD-EL-W series drive uses Modbus networks communication protocol. The Modbus uses
one of the following two modes: ASCII (American Standard Code for Information Interchange) or
RTU (Remote Terminal Unit). The ASCII mode transfers the data into corresponded ASCII code
before transmission; meanwhile, the RTU directly transmits the data without translation. The
followings are descriptions for ASCII mode:
 The CPU delays about 1 second when using the communication reset; therefore, there is at
least 1 second delay time in the master station.
 Each 8-bit data is the combination of two ASCII characters. For example, one byte of data: 64
Hex, shown as ‘64’ in ASCII, consists of ‘6’ (36Hex) and ‘4’ (34Hex). The following table is the
ASCII characters:
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
Data Format
For ASCII
(7, N, 2)
Start
bit
0 1 2 3 4
5
6
Stop
bit
7-data bits
10-bits character frame
Stop
bit
(7, E, 1)
Even
parity
Start
bit
0 1
2
3 4 5 6
Stop
bit
7-data bits
10-bits character frame