Delta VFD2A8MS21ANSAA User Manual

Appendix A. Modbus ProtocolMS300
782
 This appendix helps users to control by computers and monitor drive parameters and status
through Modbus by using RS-485 serial communication interface
 When using the communication interface, the diagram on the
right shows the communication port pin definitions. It is
recommended that you connect the AC motor drive to your PC
by using Delta IFD6530 or IFD6500 as a communication
converter.
 The default communication formats for communication port:
1. Modbus ASCII mode
2. 9600 bps serial communication baud rates
3. 7-bit data character
4. No calibration
5. 2 stop bit
 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)
A-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
‘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
A-2 Data Format
10-bit character frame (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

Delta VFD2A8MS21ANSAA Specifications

General

Brand	Delta
Model	VFD2A8MS21ANSAA
Category	DC Drives
Language	English