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Chapter 4 Parameters|
RTU mode:
Command message:
ADR
CMD
data
Starting address
data
CRC CHK LOW
CRC CHK HIGH
● 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
4-76
Response message:
01H
ADR
06H
CMD 1
01H
data
00H
Starting address
17H
data
00H
87H
CRC CHK LOW
C6H
CRC CHK HIGH
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
Error response message
01H
ADR
06H
CMD 1
01H
Error code
00H
CRC CHK LOW
17H
CRC CHK HIGH
70H
87H
C6H
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
Revision July 2008, EG03, SW V1.06
01H
86H
02
C3H
A1H
':'
'0'
'1'
'8'
'8'
'0'
'2'
'6'
'D'
CR
LF
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