User manual

Chapter 5 Parameter Introductions
Data length: fixed at 8 bits
Parity: even parity/no parity/odd parity selectable (parameter Pb.02)
Stop bit: fixed at 1 bit
Protocol: In accordance with MODBUS
Maximum number of units to be connected: 31 units (when RS-485 is used.)
◆Data to be sent or received by Communication
Data to be sent or received by communication include run commands, frequency
reference, fault contents, inverter status and parameter writing/reading. It is need not
to set parameter, you can read monitor content and write function parameter.
Select “serial communication” in parameter P0.01 (Frequency setting 1, P0.01=5) or
P0.02 (Frequency setting 2, P0.02=5), and then the frequency setting command can be
provided by PLC. Writing the value of frequency setting in special register (002H)
can set frequency setting, which is not saved after power off. Or set P0.01（or P0.02）
to 1 modify the value of P0.00 by communication to come true frequency setting.
Set the operating control method in parameter P0.04 to “Serial communication
1(STOP invalid)” (P0.04=3) or “Serial communication 2(STOP valid)” (P0.04=4).
Then the operating command can be provided by PLC;
If the setting value of P7.00 is 4 (Serial communication), the PID feed can set by PLC;
If the setting value of P7.01 is 2 (Serial communication), the PID feedback can set by
PLC.
If serial communication is selected as the frequency setting or run command, then the
commands of reading the running status of inverter, writing run command or
reading/writing parameters are all valid. If frequency setting is set to “serial
communication”, frequency command can be preset by communication; if run
command mode is set to “serial communication”, the running command send by
communication will be effective. If you want both frequency command and running
command valid, you must select “serial communication” in frequency setting (1 or 2
in parameter P0.01 or P0.02) and run command mode (3 or 4 in parameter P0.04).
Range: 0～5【3】
Pb.00 MODBUS Baud rate selection
0:1200bps 1:2400 bps
2:4800 bps 3:9600 bps
4:19200 bps 5:38400 bps
Pb.01 MODBUS slave address
Range: 0～31【1】
Note:
The slave address number is set. It is necessary to set the address number so that it will
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