7. Description of Parameters MD500 User Manual
- 202 -
7.10 Communication
MD500 supports the communication links, Modbus, PROFIBUS-DP, CANlink (always valid), or CANopen.
You can monitor and control of the AC drive, for example, view or modify the function parameters by using a host computer.
Make sure to set the communication parameters correctly. Otherwise, the communication may not be implemented.
Function Code Parameter Name Setting Range Default
F0-28 Serial port communication
protocol
0: Modbus protocol
1: PROFIBUS-DP or CANopen protocol
0
Fd-00 Baud rate WR 6005
Fd-01 Modbus data format symbol 0 to 3 0
Fd-02 Local address 0: Broadcast address
1 to 247
1
Fd-03 Modbus response delay 0 to 20 2
Fd-04 Serial port communication
timeout
0.0 (Invalid)
0.1 to 60.0
0.0
Fd-05 Modbus protocol selection and
PROFIBUS-DP data frame
00 to 31 30
Fd-06 Current resolution read
by communication
0 to 1 0
Fd-08 CANlink communication
timeout time
0.0 (Invalid)
0.1 to 60.0
0
7.10.1 Read and Write Function Parameters
Ƶ
Read Function Parameters
For function parameters in groups F0 to FF and A0 to AF, the highest eight bits in the communication address indicate the function
code group, while the lowest eight bits indicate the hexadecimal number converted from the SN in the function code group.
For example, the communication address of F0-16 is F010H, in which F0H indicates function code group F0 and 10H is the
hexadecimal number converted from 16.
The communication address of AC-08 is AC08H, in which ACH indicates function code group AC and 08H is the hexadecimal
number converted from 8.
To read the desired function parameter, the host computer needs to send a read command to the AC drive. Here takes the Modbus
protocol as an example to describe the communication process of reading the drive data.
For example, to read F0-10, the read command is 01 03 F0 0A 01 DE D7 (hexadecimal). In the command,
ƕ 01H (settable): AC drive address
ƕ 03H: read command
ƕ F00AH: communication address of F0-10
ƕ 01H: number of function parameters
ƕ DED7H: CRC check
efesotomasyon.com
To Next Page
Loading...