Communication parameter group 07
PARAMETER DESCRIPTION 206
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.If the number of PU communication errors exceeds the setting value of 07-33(P.818) and the value of
07-35(P.820) is 0, the alarm PUE will be triggered.
4.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 SA3 RS485 communication interface
1.
Terminal configuration of SA3 RS485 communication interface (COM1)
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).
Station
number1
PLC
Inverter 1
OPEN
SW6
3.
Communication between upper controller and multiple inverters (take PLC as an example)
Station
number 1
PLC
Station
number 2
.....
Station
number n
Inverter 1
Inverter 2
Inverter n
OPEN
SW6
OPEN
SW6
OPEN
SW6
4.
SA3 series inverter support Shihlin communication protocol and MODBUS communication protocol.
Note: Please switch the SW6
to 120Ω on inverter farthest from the upper controller.
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.
①
②
③
④
⑤
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:
Содержание SA3 Series
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