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9
RS-485 INTERFACE
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Chapter
9
The RS-485 interface is intended to read the indicated value and status of the F701-P and read/write
setting values with the F701-P. It is convenient for processing of control, compilation, recording,
etc., as the F701-P is connected to a PLC, programmable display, etc.
9-1.
Communication specifications
■
Standards
Message format:
Modbus-RTU, UNI-Format
Signal level:
RS-485-compliant, two-wire
Transmission distance:
Approx. 1km
Transmission mode:
Asynchronous, half-duplex communication
Transmission speed:
1200, 2400, 4800, 9600, 19200, 38400bps selectable
Number of connectable units: Max. 32 (including one master)
Bit configuration:
Start bit
1 bit
Length of character 7 or 8 bits selectable
(8 bits for Modbus-RTU)
Stop bit
1 or 2 bits selectable
Parity bit
None, odd, or even selectable
Code:
Binary (for Modbus-RTU)
ASCII (for UNI-Format)
9
RS-485 INTERFACE
RS-485 terminals
RS-485 signal ground terminal
Содержание F701-P
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