Communication parameter group07
PARAMETER DESCRIPTION 170
Note: 1. Maximum inverter connect number is determined by wiring method and impedance matching. Please set
station number value to non-zero when using Modbus protocol.
2. If communication error times exceed set value of 07-08(P.52), and 07-10(P.153) is set to 0, OPT alarm will
trigger.
3. Modbus protocol is expressed according to start bit, data bit, parity check bit and stop bit. In addition, N means
no parity check, E means 1-bit even check, and O means 1-bit odd check
Composition and wiring of SE3 RS-485 communication interface
1.
Terminal configuration of SE3 RS-485 communication interface (COM1)
RJ45x
4:DB-
5:DA+
7:+5V
8:GND
RJ45x2 PIN introduction
1,2,3,6:Reserve
4:DB-
5:DA+
7:+5V
8:GND
2.
Communication between upper controller and a single inverter (take PLC as an example).
3.
Communication between upper controller and multiple inverters (take PLC as an example).
4.
SE3 series inverter support Shihlin communication protocol and MODBUS communication protocol.
Shihlin communication protocol
1. Upper controller and inverter automatically converted into ASCII code (hexadecimal) for communication
2. Please follow the steps to perform data communication between upper controller and inverter.
PC
Inverter
Inverter
PC
time
Data reading
Data writing
Please refer to the following table for descriptions of communication actions and communication data format type in the
above steps:
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