YASKAWA GA700 Technical Manual page 233

1.
Connect the communications cable between the PLC and drive when the drive is de-energized. The
connection terminal of the MEMOBUS/Modbus communications cable is TB4.
A - Terminal AC: Shield ground
B - Terminal D+: Communication
input/output (+)
Note:
Separate the communications wiring from the main circuit wiring, other wiring and power lines. Use shielded wires for the
communications wiring and connect cable sheaths to the ground terminal of the drive. This prevents malfunction due to
noise.
2.
Confirm that the termination resistor is installed to the network termination slave. Enable the termination
resistor for the drive by setting the DIP switch S2 to the ON position.
3.
Turn on the power.
4.
Set necessary communications parameters H5-01 through H5-12 using the keypad.
• H5-01 [Drive Node Address]
• H5-02 [Communication Speed Selection]
• H5-03 [Communication Parity Selection]
• H5-04 [Stopping Method after Com Error]
• H5-05 [Comm Fault Detection Select]
• H5-06 [Drive Transmit Wait Time]
• H5-09 [CE Detection Time]
• H5-10 [Unit Sel forMEMOBUS/Modbus 0025H]
• H5-11 [Communications ENTER Func Select]
• H5-12 [Run Command Method Selection]
5.
Shut the power off and wait for the keypad display to go out completely.
6.
Turn the power back on.
7.
The drive is ready to begin communicating with the PLC.
■
Set the Termination Resistor
In MEMOBUS/Modbus communications, the termination resistor for the drive needs to be enabled on the slave
terminal. The termination resistor built in this product can be turned ON and OFF with DIP switch S2 on the
terminal block. If the drive is installed in the terminal of the communication line, set DIP switch S2 to ON. Also,
confirm that DIP switch S2 is OFF for other drives. Setting the DIP switch S2 as shown in the following drawing.
Use the tip of tweezers or a jig with a tip width of 0.8 mm to set the DIP switch.
Figure 5.3 MEMOBUS/Modbus Communication Terminal and DIP Switch S2
■
Wiring Diagram for Multiple Connections
Describes the wiring for the running of multiple connected drive units using MEMOBUS/Modbus
communications.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Figure 5.2 Communications Cable Connection Terminal (TB4)
5.3 MEMOBUS/Modbus Communications
C - Terminal D-: Communication
input/output (-)
5
233