Terminating Resistance; Repeater Units - Omron SYSMAC CS1W-RPT01 Operation Manual

Repeater Units

4-5-4

Terminating Resistance

Note
4-6 Repeater Units
104
Note Set the same baud rate for all the nodes on the Network. Normal communica-
tion cannot be performed unless the same baud rate is set for all the nodes.
Turn ON the terminating resistance using the switch on the bottom of the Unit
for the Units of both ends of the Network. The terminating resistance is
required at both ends of a Network to absorb unnecessary signals and reduce
noise.
The Controller Link Unit has built-in terminating resistance, which can be con-
nected simply by turning ON the slide switch.
Switch at the front
OFF (default)
ON
1. Always turn OFF the PLC's power before setting the terminating resistance
switch.
2. Turn ON the switch to connect terminating resistance at the nodes at both
ends of the Network and turn OFF the switch at all other nodes. Normal
communication cannot be performed in the Network unless all the nodes
are set properly.
3. The TER indicator will light when the terminating resistance switch is set
to ON.
4. The switch is factory-set to OFF (terminating resistance not connected).
Repeater Units must be set as shown in the following table before starting
communications.
Item
Baud rate
Terminating resistance
(The diagram shows the factory setting.)
Terminating resistance
Not connected.
connected
Switch
Baud rate switch, pin 1
Terminating resistance switch
Section 4-6
Page
105
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