Delta VFD-A User Manual

67
 Parameter Read Command
"R,S,A,UU,NN"

COMPUTER TO AC MOTOR DRI
V
COMMAND STRUCTURE
Word length = 7 characters
R: Header of read string
S: Check sum (03H)
A: Command acknowledge
01H: Command acknowledged by a single AC drive
02H: Command acknowledged by all AC drives
UU: Slave address (“00” - “31”)
NN: Parameter number (“00” “80”)
The AC drive will return a character string, the format of which will be as follows:
"R,S,B,UU,NN,DDDD"

AC MOTOR DRIVE TO COMPUT
E
COMMAND STRUCTURE
Word length = 11 characters
R: Header of read string
S: Check sum (03H)
B: Acknowledge back
Correct: 06H
Error: 07H
UU: Slave address (“00” - “31”)
NN: Parameter number (“00” “80”)
DDDD: Data of parameter
 AC drive Status Read Command
"Q,S,A,UU,NN"

COMPUTER TO AC MOTOR DRI
V
COMMAND STRUCTURE
Word length = 7 characters
Q: Header of question string
S: Check sum (03H)
A: Command acknowledge
01H: Command acknowledged by a single AC drive
02H: Command acknowledged by all AC drives
UU: Slave address (“00” - “31”)
NN: Retrieve contents of drive status. (x = don‘t care)
X0: Frequency command
X1: Output frequency
X2: Output current
X3: Operation command Drive status and Error code

Delta VFD-A Specifications

General

Brand	Delta
Model	VFD-A
Category	DC Drives
Language	English