BENSHAW Rsi S Series, Инструкция по эксплуатации

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RS-485 Communication Features
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7 RS-485 Communication Features
This section explains how to control the inverter with a PLC or a computer over a long distance
using the RS-485 communication features. To use these features, connect the communication
cables and set the communication parameters in the inverter. Refer to the communication
protocols and parameters to configure and use the RS-485 communication features.
Communication Standards
Following the RS-485 communication standards, the inverter can exchange data with a PLC and/or
a 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.
Item Standard
Communication
method/
Transmission type RS-485/Bus type, Multi-drop Link System
Inverter type
name Benshaw “S” Series
Number of
connected
inverters/
Transmission
distance Maximum of 16 inverters / Maximum1,200m (recommended distance: within
700m)
Recommended
cable size
0.75mm
²
, (18AWG), Shielded Type Twisted-Pair (STP) Wire
Installation type Dedicated terminals (S+/S-/SG) on the control terminal block
Power supply Supplied by the inverter - insulated power source from the inverter’s internal
circuit
Communication
speed 1,200/2,400/9,600/19,200/38,400/57,600/115,200 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