Delta Electronics AC Motor Drive VFD007S23A - Manual (Page 119)

Chapter 5 Parameters|VFD-S Series
5-64 Revision August 2006, SE08, SW V2.61
Terminal Unit). Users can select the desired mode along with the serial port
communication protocol in Pr. 9-04.
Code Description:
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
2.1 10-bit character frame (For 7-bit character):
( 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
2.2 11-bit character frame (For 8-bit character):