Baud Rates; Terminating Resistance - Omron C200HW-CLK21 Operation Manual

CVM1 and CV-series Controller Link Units
4-4-4

Baud Rates

Note
4-4-5

Terminating Resistance

2. Do not set the same node address twice within the same Network. An error
will occur if the same address is set for two different nodes. The ERC indi-
cator on the front of the Unit will light and either communications will stop,
or the INS indicator will not light and you will be unable to participate in the
Network.
3. The send sequence for the data link areas is determined according to the
sequence of node addresses for automatically set data links.
4. Assign node addresses consecutively beginning from 01 whenever possi-
ble to minimize Network construction time.
Set the following pins for the baud rate setting (DIP switch).
The factory default setting is shown above.
1. Always turn OFF the PLC's power before setting the baud rate.
2. Keep pins 3 and 4 set to OFF. If they are turned ON, internal data may be
erased.
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.
Switch
Pin 1
OFF
ON
OFF
ON
Note The factory default setting is shown in bold.
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 (factory default)
ON
ON
Pin 1, 2: Baud rate
Pin 3, 4: Not used (must be OFF)
Baud rate
Pin 2
OFF 2 Mbps
OFF 1 Mbps
ON 500 Kbps
ON Do not set.
ON
Terminating resistance
Not connected.
connected
Section 4-4
Maximum
transmission distance
500 m
800 m
1 km
99