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Modbus Network Communication
Introduction
WJ200 Series inverters have built-in RS-485 serial communications, featuring the Modbus
RTU protocol. The inverters can connect directly to existing factory networks or work with
new networked applications, without any extra interface equipment. The specifications are
in the following table.
Item
Transmission speed
Communication mode
Character code
LSB placement
Electrical interface
Data bits
Parity
Stop bits
Startup convention
Wait time for response 0 to 1000 msec.
Connections
Connector
Error check
Cable length
Connecting the Inverter to Modbus
Modbus connector is in control terminal block as below. Note that RJ45 connector (RS-422)
is used for external operator only.
Specifications
2400 / 4800 / 9600 / 19.2k / 38.4k /
57.6k / 76.8k / 115.2k bps
Asynchronous
Binary
Transmits LSB first
RS-485 differential transceiver
8-bit (Modbus RTU mode)
None / even / odd
1 or 2 bits
One-way start from host device
Station address numbers from 1 to 32
Terminal connector
Overrun, Framing block check code,
CRC-16, or horizontal parity
500m maximum
User-selectable
Ii
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