Delta CT2000 Series User Manual page 326

 Control by PC or PLC (Computer Link)
 A VFD-C2000 can be set up 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 RS-485 serial port communication
protocol in Pr.09-00.
 MODBUS ASCII（American Standard Code for Information Interchange）: Each byte 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).
1. Code Description
Communication protocol is in hexadecimal, ASCII: "0", "9", "A", "F", every 16 hexadecimal
represent ASCII code. For example:
Character
ASCII code
Character
ASCII code
 Data Format
10-bit character frame (For ASCII):
（7, N , 2）
Start
0
bit
（7 , E , 1）
Start
0
bit
Chapter 12 Description of Parameter SettingsCT2000 Series
9: 8, O, 1 for ASCII
10: 8, E, 2 for ASCII
11: 8, O, 2 for ASCII
12: 8, N, 1 for RTU
13: 8, N, 2 for RTU
14: 8, E, 1 for RTU
15: 8, O, 1 for RTU
16: 8, E, 2 for RTU
17: 8, O, 2 for RTU
'0' '1'
30H 31H 32H
'8' '9'
38H 39H 41H
1 3
2
7-data bits
10-bits character frame
1 2 3
7-data bits
10-bits character frame
12.1-09-2
'2' '3' '4'
33H 34H 35H 36H 37H
'A' 'B' 'C'
42H 43H 44H 45H 46H
4 5 6
4 5 6
'5' '6'
'D' 'E'
Stop
Stop
bit
bit
Even
Stop
parity
bit
'7'
'F'