Delta VFD300C43S-HS User Manual page 421

 Control by PC (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.
 MODBUS ASCII (American Standard Code for Information Interchange): Each byte of 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).
1. Code Description
The communication protocol is in hexadecimal, ASCII: "0"..."9", "A"..."F", every hexadecimal
value represents an ASCII code. The following table shows some examples.
Character
ASCII code
Character
ASCII code
2. Data Format
10-bit character frame (For ASCII):
(7, N, 2)
Start
0
bit
(7, E, 1)
Start
0
bit
8：8, E, 1 (ASCII)
9：8, O, 1 (ASCII)
10：8, E, 2 (ASCII)
11：8, O, 2 (ASCII)
12：8, N, 1 (RTU)
13：8, N, 2 (RTU)
14：8, E, 1 (RTU)
15：8, O, 1 (RTU)
16：8, E, 2 (RTU)
17：8, O, 2 (RTU)
'0' '1'
30H 31H 32H
'8' '9'
38H 39H 41H
1 2 3
7-data bits
10-bits character frame
1 2 3
7-data bits
10-bits character frame
12.1-09-2
Chapter 12 Description of Parameter SettingsC2000-HS
'2' '3' '4'
33H 34H
'A' 'B' 'C'
42H 43H
4 5 6
4 5 6
'5' '6'
35H 36H
'D' 'E'
44H 45H
Stop
Stop
bit
bit
Even
Stop
parity
bit
'7'
37H
'F'
46H