Communication Connection Terminal; Procedure For Setting Up Communication; Rs-485 Communication Connection - YASKAWA F7 User Manual

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Communication Connection Terminal

Modbus communication uses the following terminals: S+, S-, R+, and R-. The terminating resistor must be turned ON only if
the Drive is at the very end of the serial communication chain. Set the terminating resistor by turning ON pin 1 of switch S1.
RS-422A
or RS-485
Terminating resistor (1/2W, 110 Ohms)
IMPORTANT

Procedure for Setting Up Communication

Use the following procedure to perform communication with the PLC.
1. Turn OFF the input to the Drive power and connect the communication cable between the PLC (or other master device)
and the Drive.
2. Turn ON the input power to the Drive.
3. Set the required communication parameters (H5-01 to H5-07) using the Digital Operator.
4. Turn OFF the input to the Drive power, and check that the Digital Operator display has completely extinguished.
5. Turn ON the input power to the Drive once again.
6. Perform communication with the master device.
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Switch
Fig D.2 Communication Connection Terminals and Terminating Resistor
1. Separate the communication cables from the main circuit cables and control circuit wiring.
2. Use shielded cables for the communication cable, and use proper shield clamps. Shield at one end only.
3. When using RS-485 communication, connect S+ to R+, and S- to R-, on the control circuit terminal
board. See Fig D.3 below.
Fig D.3 RS-485 Communication Connection
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S1
O
1
1
F
F
2
Communications D - 3
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DIP Switch S1 located on
terminal board.
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Terminating
resistor