Kruger Ecowatt Drive K120 Series, Operation Manual

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Ecowatt ® Drive K120 series Communication protocol
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RTU master command RTU slave response
Data content
high-order bit
12H
Data content
high-order bit
12H
Data content
low-order bit
ABH
Data content
low-order bit
ABH
CRC CHK low-order
bit
ADH CRC CHK low-order bit ADH
CRC CHK high-order
bit
14H
CRC CHK high-order
bit
14H
END T1-T2-T3-T4 END T1-T2-T3-T4
7.3.4 Command code 10H, continuous writing
The command code 10H is used by the master to write data to the VFD. The quantity of
data to be written is determined by "Data number", and a maximum of 16 pieces of data
can be written.
For example, to write 5000 (1388H) and 50 (0032H) respectively to 0004H and 0005H of
the VFD whose slave address is 02H, the frame structures are described in the
following.
RTU master command (sent from the master to the VFD):
START
T1-T2-T3-T4 (time gap with a min.
length of 3.5 bytes)
ADDR 02H
CMD 10H
High-order bit of data writing address
00H
Low-order bit of data writing address
04H
Data number high-order bit
00H
Data number low-order bit
02H
Number of bytes
04H
Content high-order bit of 0004H
13H
Content low-order bit of 0004H
88H
Content high-order bit of 0005H
00H
Content low-order bit of 0005H
32H
CRC low-order bit
C5H
CRC high-order bit
6EH
END
T1-T2-T3-T4 (time gap with a min.
length of 3.5 bytes)