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VFD-F Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5-52
z Command code: 08H, loop detection
This command is used to test the communication condition between master
control equipment (usually is PC or PLC) and AC drive. AC drive will deliver the
data that received from AC drive to master control equipment.
For example:
ASCII mode:
Command message: Response message: Error response message
STX ‘:’ STX ‘:’ STX ‘:’
ADR 1 ‘0’ ADR 1 ‘0’ ADR 1 ‘0’
ADR 0 ‘1’ ADR 0 ‘1’ ADR 0 ‘1’
CMD 1 ‘0’ CMD 1 ‘0’ CMD 1 ‘8’
CMD 0 ‘8’ CMD 0 ‘8’ CMD 0 ‘8’
data ‘0’ data ‘0’ Error ‘0’
Starting ‘0’ Starting ‘0’ code ‘2’
address ‘0’ ‘0’ LRC CHK 0 ‘6’
‘0’ ‘0’ LRC CHK 1 ‘D’
data ‘1’ data ‘1’ END 1 CR
‘7’ ‘7’ END 0 LF
‘7’ ‘7’
‘0’ ‘0’
LRC CHK 1 ‘7’ LRC CHK 1 ‘7’
LRC CHK 0 ‘0’ LRC CHK 0 ‘0’
END 1 CR END 1 CR
END 0 LF END 0 LF
RTU mode:
Command message: Response message: Error response message
ADR 01H ADR 01H ADR 01H
CMD 08H CMD 1 08H CMD 1 88H
data 00H data 00H Error code 02
Starting address 00H Starting address 00H CRC CHK LOW
E0H
data 17H data 17H CRC CHK HIGH
6DH
70H 70H
CRC CHK LOW EEH
CRC CHK LOW
EEH
CRC CHK HIGH 1FH
CRC CHK HIGH
1FH
z Command code: 10H, write continuous words
For example, modify multi-step speed setting of AC drive (address 01H)
05-00=50.00(1388H)，05-01=40.00(0FA0H)