Delta Electronics AC Drive VFD-F Series User Manual page 85

VFD-F Series
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:
STX
ADR 1
ADR 0
CMD 1
CMD 0
data
Starting
address
data
LRC CHK 1
LRC CHK 0
END 1
END 0
RTU mode:
Command message:
ADR
CMD
data
Starting address 00H
data
CRC CHK LOW EEH
CRC CHK HIGH 1FH
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)
Response message:
':' STX
'0' ADR 1
'1' ADR 0
'0' CMD 1
'8' CMD 0
'0' data
'0' Starting
'0'
'0'
'1' data
'7'
'7'
'0'
'7' LRC CHK 1
'0' LRC CHK 0
CR END 1
LF END 0
Response message:
01H ADR
08H CMD 1
00H data
Starting address 00H
17H data
70H
CRC CHK LOW EEH
CRC CHK HIGH 1FH
5-52
Error response message
':' STX
'0' ADR 1
'1' ADR 0
'0' CMD 1
'8' CMD 0
'0' Error
'0' code
'0' LRC CHK 0
'0' LRC CHK 1
'1' END 1
'7' END 0
'7'
'0'
'7'
'0'
CR
LF
Error response message
01H ADR
08H CMD 1
00H Error code
CRC CHK LOW
17H CRC CHK HIGH 6DH
70H
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':'
'0'
'1'
'8'
'8'
'0'
'2'
'6'
'D'
CR
LF
01H
88H
02
E0H