C.4 Connecting to a Network
This section explains the connection of a drive to a MEMOBUS/Modbus network and the network termination.
u
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.
S– S+ IG R– R+
S-
S+
IG
R-
R+
Send (-)
Receive (+)
Receive (-)
Shield Ground
Send (+)
Figure C.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 slaves. Refer to Network Termination for Network Termination on
SI-485/J.
3.
Switch the power on.
4.
Set the parameters needed for serial communications (H5-01 through H5-07, -12, -13) 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.
C.4 Connecting to a Network
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
211
C
MEMOBUS/Modbus
Communications
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