166
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
C.3 Connecting to a Network
C.3 Connecting to a Network
This section explains how to connect the regenerative unit to a MEMOBUS/Modbus network and the network
termination required for a connection.
◆
Network Cable Connection
Follow the instructions below to connect the regenerative unit to a MEMOBUS/Modbus network.
1.
With the power shut off, connect the communications cable to the regenerative unit and the master. Use
terminals TB5 for MEMOBUS/Modbus.
Figure C.2
Figure C.2 Serial Communications Cable Connection Terminals (TB5)
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 electrical 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 termination resistor selection at all slaves. Use the description in
for slaves that are regenerative units.
3.
Switch the power on.
4.
Set the parameters needed for serial communications (H5-01 through H5-12) using the digital operator.
5.
Shut the power off and wait until the display on the digital operator goes out completely.
6.
Turn the power back on.
7.
The regenerative unit 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 regenerative unit has a built in
termination resistor that can be enabled or disabled using DIP switch S2. If a regenerative unit is located at the end of a
network line, enable the termination resistor by setting DIP switch S2 to the ON position. Disable the termination resistor
on all slaves that are not located at the network line end.
To set the DIP switch, use tweezers or a tool with a tip width of approximately 0.8 mm.
Figure C.3
Figure C.3 Communication Terminals and DIP Switch S2
Send (–)
S–
(TB5)
IG
Shield Ground
R+ Receive (+)
R– Receive (–)
S+
Send (+)
YEC
DIP Switch S2
(OFF: Default)
OFF
ON
O N
RS-422/
RS-485
R-
R+
DIP
switch
S2
Termination Resistor (1/2 W
，
110 W)
S-
S+
+
-
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