K&R GT600-4T132G User Manual page 129

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Serial Comms.
We have the serial communications options, Modbus, Profibus-DP, CANlink and
CANopen.
F0-28 has to be set correctly to engage the selected serial communication card if Modbus,
Profibus-DP or CANopen is selected. F0-28 need not be set if CANlink is selected.
Function Code Parameter Name
F0-28 Serial port
communication
protocol
When the AC drive is controlled via serial communication, the host computer must send
write command to the AC drive. The below Figure 6-26 uses the Modbus protocol to
control frequency reference.
Figure 6-26 Use Modbus serial comms. to control frequency reference
Wire host computer and
extension Modbus card that
Extension Modbus
has been inserted onto the
card
drive.
Host
485+ 485- CGND
computer
RS485
When the AC drive is controlled via communication, host computer must send write
command to the AC drive. Here takes Modbus as an example to describe process of
giving RUN command via serial communication.
Setting Range
0: Modbus protocol
1: PROFIBUS-DP protocol or CANopen
protocol
Keep the following parameter setting
in AC drive with that in host computer.
Function Code Parameter Name
Fd-00 Baud rate
Fd-01
Data format symbol
Fd-02 Local address
Fd-03 Response delay
Fd-04 Communication timeout
Modbus protocol selection and
Fd-05
PROFIBUS-DP data frame
6. Description of Parameters
Default
0
= 0
= 1
.
.
.
= 8
Main
frequency
Serial comms.
= 9
reference
F0-03
6
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