Inovance MD500T22GB-INT - Serial Comms.

6. Description of Parameters
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6
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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,
Probus-DP or CANopen is selected. F0-28 need not be set if CANlink is selected.
Function Code Parameter Name Setting Range Default
F0-28
Serial port
communication
protocol
0: Modbus protocol
1: PROFIBUS-DP protocol or CANopen
protocol
0
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
F0-03
.
= 9
Fd-00
Fd-01
Function Code
Parameter Name
Baud rate
Data format symbol
Fd-02
Fd-
03
Fd-04
Fd-05
Modbus protocol selection and
PROFIBUS-DP data frame
Local address
Response delay
Communication timeout
Keep the following parameter setting
in AC drive with that in host computer.
Extension Modbus
card
485+
485-
CGND
RS485
Wire host computer and
extension Modbus card that
has been inserted onto the
drive.
Host
computer
= 0
Serial comms.
Main
frequency
reference
.
.
= 1
= 8
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.