YASKAWA OYMC V1000, Programming Manual

Page: 260 / 408

260 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
2.3 Connecting to a Network
2.3 Connecting to a Network
This section explains the connection of a drive to a MEMOBUS/Modbus network and the
network termination.
◆
Network Cable Connection
Follow the instructions below to connect the drive to a MEMOBUS/Modbus network.
1. With the power shut off, connect the communications cable to the drive and the master.
Use the terminals shown in the figure below for network cable connections.
Figure 2.2
Figure 2.2 Serial Communications Cable Connection Terminals
Note: Separate the communications cables from the main circuit cables and other wiring and power
cables. Use shielded cables for the communications cables, and properly shielded clamps to
prevent problems with noise. When using RS-485 communications, connect S+ to R+, and S- to
R- as shown in the diagram below.
2. Check or set the terminating resistance at all nodes. Use the description in Network
Termination on page 260 for nodes that are V1000 drives.
3. Switch the power on.
4. Set the parameters need for serial communications (H5-01 through H5-12) using the LED
operator.
5. Shut the power off and wait until the display on the LED operator goes out completely.
6. Turn the power back on.
7. The drive is now ready to begin communicating with the master.
◆
Network Termination
The two ends of the MEMOBUS/Modbus network line have to be terminated. The drive has
a built in terminating resistance that can be enabled or disabled using switch S2 on the
terminal board. If a V1000 drive is located at the end of a network line, enable the
R+ Receive (+)
R- Receive (-)
S+ Send (+)
S- Send (-)
IG Shield Ground