K&R GT600-4T132G User Manual page 109

6.1.2 Serial Communication
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. 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.
Connect host computer and
the extension Modbus card
that has been inserted onto
the drive.
Host
computer
RS485
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 definition of other communication addresses and control commands, see
Master Command
ADDR
CMD
Parameter address high bits
Parameter address low bits
Data content high bits
Data content low bits
CRC high bits
CRC low bits
Setting Range
0: Modbus protocol
1: PROFIBUS-DP protocol or CANopen protocol
Keep the following parameter setting in
AC drive consistent with that in the host computer.
Extension Modbus
card
Function Code Parameter Name
Fd-00
Fd-01
485+ 485- CGND
Fd-02
Fd-03
Fd-04
Fd-05
.
01H
06H
20H
00H
00H
02H
03H
CBH
6. Description of Parameters
Baud rate
Data format symbol
Local address
Response delay
Communication timeout
Modbus protocol selection and
PROFIBUS-DP data frame
Slave Response
ADDR
CMD
Parameter address high bits
Parameter address low bits
Data content high bits
Data content low bits
CRC high bits
CRC low bits
Default
0
= 0
= 1
Running
command
= 2 Serial
comms.
F0-02
01H
06H
20H
00H
00H
02H
03H
CBH
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