Omron CVM1-CLK21, Operation Manual

Page: 70 / 309

54
CS-series Controller Link Units Section 4-1
4-1-4 Baud Rates
Set the following pins for the baud rate settings (DIP switch).
Note 1. Always turn OFF the PC’s power before setting the baud rate.
2. Keep pins 3 and 4 set to OFF.
Baud Rate (Pins 1 and 2) Set the same baud rate for all the nodes on the Network using DIP switch pins
1 and 2 on the front of the Unit. The baud rate is set as shown below.
The maximum transmission distance will also change according to the setting.
Note The factory default setting is shown in bold.
Note 1. Set the same baud rate for all the nodes on the Network. Normal commu-
nication cannot be performed unless the same baud rate is set for all the
nodes.
2. The default setting is 2 Mbps, 500 m.
4-1-5 Terminating Resistance
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.
Note 1. Always turn OFF the PC’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 LED indicator will light when the terminating resistance switch is
set to ON.
Pins 3, 4: Not used (must be OFF)
Pins 1, 2: Baud rate
Note: The factory default settings are shown above.
Pins Baud rate Maximum
transmission distance
Pin 1 Pin 2
OFF OFF 2 Mbps 500 m
ON OFF 1 Mbps 800 m
OFF ON 500 Kbps 1 km
ON ON Do not set.
Bottom switch Terminating resistance
OFF (factory default) Not connected.
ON Connected.
ON