Inovance MD500T75G - Page 113

MD500 User Manual 7. Description of Parameters
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7.1.2 Communication Control
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as Modbus, PROFIBUS-DP, CANlink, or CANopen.
To use communication with the MD500, the matching communication card must be installed. If the communication protocol is
Modbus, PROFIBUS-DP or CANopen, select the proper serial communication protocol in F0-28.
The CANlink protocol is always valid.
Function Code Parameter Name Setting Range Default
F0-28 Serial port communication
protocol
0: Modbus protocol
1: PROFIBUS-DP protocol or CANopen protocol
0
Figure 7-11 Diagram of setting run command via communication
F0-02
Communication
0
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 parameter setting in MD500
consistent with that in the host computer.
Running
command
Host
computer
RS485 extension card
485+
485-
CGND
RS485
Wire the host computer
and the RS485 extension
card that has been
inserted onto the drive.
When the AC drive is controlled via communication, the host computer must send write command to the AC drive. Here takes the
Modbus protocol as an example to describe the process of giving run command via communication.
To make the AC drive run in the reverse direction, the host computer sends the write command 01 06 20 00 00 02 03 CB
(hexadecimal). In the command,
ƕ 01H (settable): AC drive address
ƕ 06H: write command
ƕ 2000H: communication address
ƕ 02H: reverse run
ƕ 03CBH: CRC check
For definition of other communication addresses and control commands, see section 8.4 "Definition of Communication Data
Address".
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
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