Chapter 5: Serial Communications
Page 5–15
DuRApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Command Code: 06h, WriTe 1 Word
For example, writing 6000(1770H) to address 0100H of the AC drive with address 01H.
ASCII mode:
Command Message Response Message
STX ‘:’ STX ‘:’ ‘:’
ADR 1
ADR 0
‘0’
ADR 1
ADR 0
‘0’
‘1’ ‘1’
CMD 1
CMD 0
‘0’
CMD 1
CMD 0
‘0’
‘6’ ‘6’
Data Address
‘0’
Data Address
‘0’
‘1’ ‘1’
‘0’ ‘0’
‘0’ ‘0’
‘1’
Data Content
‘1’
‘7’ ‘7’
‘7’ ‘7’
‘0’ ‘0’
LRC CHK 1
LRC CHK 0
‘7’
LRC CHK 1
LRC CHK 0
‘7’
‘1’ ‘1’
END 1
END 0
CR
END 1
END 0
CR
LF LF
RTU mode:
This is an example of using function code 16 for writing to multiple registers.
Command Message Response Message
ADR 01H ADR 01H
CMD 10H CMD 10H
Starting data
address
20H
Starting data
address
20H
00H 00H
Number of
registers
00H
Number of data
(Count by word)
00H
02H 02H
Byte count 04H
CRC CHK Low
CRC CHK High
4AH
Content of
data address
2000H
00H 08H
02H
Content of
data address
2001H
02H
58H
CRC CHK Low
CRC CHK High
CBH
34H
NOTE Concerning 2100h: When GS4 drive is setup with reference RS-485, ModbusTCP, or
EtherNet/IP (P4.00 = 1 or 4, & drive in Remote/Auto) –OR– (P4.00 = 1 or 4, & drive in Local/Hand)
–AND– Reference > P0.04 Drive Max Out Freq, the GS4 drive goes up to Max Out Freq and remains
there until Max Out Freq is modified or a lower Freq Ref or a Stop Command is sent to the drive.
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