BENSHAW Rsi S Series, Инструкция по эксплуатации

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RS-485 Communication Features
232
Communication System Configuration
In an RS-485 communication system, the PLC or computer is the master device and the inverter is
the slave device. When using a computer as the master, a converter must be integrated with the
computer, so that it can communicate with the inverter through the USB/RS-232/RS-485 converter.
Specifications and performance of converters may vary depending on the manufacturer, but the
basic functions are identical. Please refer to the converter manufacturer’s user manual for details
about features and specifications.
Connect the wires and configure the communication parameters in the inverter by referring to the
following illustration of the communication system configuration.
Communication Line Connection
Make sure that the inverter is turned off completely, and then connect the RS-485 communication
line to the S+/S-/SG terminals of the terminal block. The maximum number of inverters you can
connect is 16. For communication lines, use shielded twisted pair (STP) cables.
The maximum length of the communication line is 1,200 meters, but it is recommended to use no
more than 700 meters of communication line to ensure stable communication. Please use a
repeater to enhance the communication speed when using a communication line longer than 1,200
meters or when using a large number of devices. A repeater is effective when smooth
communication is not available due to noise interference.
When wiring the communication line, make sure that the SG terminals (grond) on the PLC and inverter
are connected. SG terminals prevent communication errors due to electronic noise interference.
Setting Communication Parameters
Before proceeding with setting communication configurations, make sure that the communication
lines are connected properly. Turn on the inverter and set the communication parameters.
Group Code Name LCD Display Parameter Setting Setting
range Unit
CM 01 Built-in
communication
inverter ID Int485 St ID 1 1-250 -
RS-232/485
Inverter #1
Converter
Computer
Inverter #2 Inverter #n