Network termination, Figure c.4 – Yaskawa iQpump1000 AC Drive Quick Start User Manual
Page 416
n
RS-422 Interface
R–
R+
S–
S+
IG
PLC
Drive
Drive
Drive
S–
S+
R–
R+
IG
S–
S+
R–
R+
IG
S–
S+
R–
R+
IG
S2
OFF
S2
OFF
S2
ON
Figure C.4 RS-422 Interface
Note:
1. Set DIP switch S2 to the ON position on the drive located at the end of the network. Set DIP switch S2 to the OFF positions on all other
slave devices.
2. Set H5-07 to 1 when using the RS-422 interface in a multi-drop circuit.
Set H5-07 to 0 when using the RS-422 interface in a point-to-point circuit.
u
Network Termination
The two ends of the MEMOBUS/Modbus network line have to be terminated. The drive has a built in termination resistor that
can be enabled or disabled using DIP switch S2. If a drive 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.
C.3 Connecting to a Network
416
YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide