9.7.RS-422/485 interface
252
External equipment
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9.7. RS-422/485 interface
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6SHFL¿FDWLRQ Description
Transmission method Half duplex
Synchronous system Start-stop synchronization
Baud rate Selectable from 1 200 bps, 2 400 bps, 4 800 bps, 9 600 bps,
19 200 bps and 38 400 bps.
Data bit length Selectable from 7 bit and 8 bit.
Parity bit Selectable from no parity, even parity and odd parity.
Stop bit Selectable from 1 bit and 2 bit.
Terminator Selectable from CR+LF and CR.
Transmission data ASCII code
Length of cable Approx. 1 km
Address number Select one from 0 to 31.
Number of connectable
units
Up to 32 units (10 units for RS-422; 1 unit for stream mode)
Termination resistance Built-in type (Selectable on the terminal block wiring screen. )
I/O monitor :LWK/('V
RS-422/485 switching Switchable on the RS-422/RS-485 screen.
POINT
- The standard RS-485 communication and Modbus communication cannot be
linked with optional RS-232C communication, RS-422 communication, or RS-485
communication.
- For more information about the data formats, refer to "12.5. RS-232C/422/485
communication data formats".