LSIS G100, Operation Manual

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7 RS-485 Communication Features
This section in the user manual explains how to control the inverter with a PLC or a
computer over a long distance using the RS-485 communication features. To use the
RS-485 communication features, connect the communication cables and set the
communication parameters on the inverter. Refer to the communication protocols and
parameters to configure and use the RS-485 communication features.
7.1 Communication Standards
Following the RS-485 communication standards, G100 products exchange data with a
PLC and computer. The RS-485 communication standards support the Multi-drop Link
System and offer an interface that is strongly resistant to noise. Please refer to the
following table for details about the communication standards.
Items Standard
Communication method/
Transmission type
RS-485/Bus type, Multi-drop Link System
Inverter type name G100
Number of connected
inverters/ Transmission
distance
Maximum of 16 inverters / Maximum1,200 m (recommended
distance: within 700 m)
Recommended cable size 0.75mm², (18AWG), Shielded Type Twisted-Pair (STP) Wire
Installation type
Dedicated terminals (S+/S-) on the control terminal block
Connected to the RJ-45 connector (no 1 pin S+, no 8 pin S-)
Power supply
Supplied by the inverter-insulated power source from the
inverter’s internal circuit
Communication speed 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200 bps
Control procedure Asynchronous communications system
Communication system Half duplex system
Character system Modbus-RTU: Binary / LS Bus: ASCII
Stop bit length 1-bit/2-bit
Frame error check 2 bytes
Parity check None/Even/Odd