Inovance MD500 Series User Manual

6. Description of Parameters
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6
6.1.2 Serial Communication
We have the serial communications options, Modbus, Probus-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. Here takes the Modbus protocol as an example to describe process of
giving run command via communication.
Figure 6-11 Example below with Modbus serial comms.
F0-02
= 1
= 2
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 consistent with that in the host computer.
Extension Modbus
card
485+
485-
CGND
RS485
Connect host computer and
the extension Modbus card
that has been inserted onto
the drive.
Host
computer
= 0
Serial
comms.
Running
command
To make the drive run in reverse direction, the host computer sends the write command 01 06 20
00 00 02 03 CB (hexadecimal). In the command,
● 01H (settable): AC drive address
● 06H: write command
● 2000H: communication address
● 02H: reverse run
● 03CBH: CRC check
For denition of other communication addresses and control commands, see
7
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Master Command Slave Response
ADDR 01H ADDR 01H
CMD 06H CMD 06H
Parameter address high bits 20H Parameter address high bits 20H
Parameter address low bits 00H Parameter address low bits 00H
Data content high bits 00H Data content high bits 00H
Data content low bits 02H Data content low bits 02H
CRC high bits 03H CRC high bits 03H
CRC low bits CBH CRC low bits CBH

Inovance MD500 Series Specifications

General

Brand	Inovance
Model	MD500 Series
Category	Inverter
Language	English