Automation Direct DURApulse GS4 User Manual page 319

C p
ommuniCaTion
ASCII Mode:
RTU Mode:
ADR (Communication Address)
Valid communication addresses are in the range of 0 to 254. A communication address equal to 0
means broadcast to all AC drives, in which case the drives will not acknowledge any message from
the master device.
For example, communication to AC drive with address 16 decimal:
• ASCII mode: (ADR 1, ADR 0)='1','0' => '1'=31H, '0'=30H
• RTU mode: (ADR)=10H
DuRA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
roToCol
STX Start Character: (3AH)
ADR 1
ADR 0
Communication Address: 8-bit address consists of 2 ASCII
codes
CMD 1
CMD 0
DATA (n-1)
Contents of data: n x 8-bit data consists of 2n ASCII codes� n
�������
� 25 maximum of 50 ASCII codes
DATA 0
LRC CHK 1
LRC check sum: 8-bit check sum consists of 2 ASCII codes
LRC CHK 0
END 1
END characters: END 1 = CR (0DH); END 0 = LF (0AH)
END 0
START A silent interval of more than 10 ms
ADR Communication Address: 8-bit address
CMD Command Code: 8-bit command
DATA (n-1)
������� Contents of data: n x 8-bit data, n � 25
DATA 0
CRC CHK Low
CRC check sum: 16-bit check sum consists of 2 8-bit
CRC CHK
characters
High
END A silent interval of more than 10 ms
Chapter 5: Serial Communications
Page 5–13