Omron CJ1W-DRM21 Operation Manual page 72

2 Nomenclature and Installation
Precautions for Safe Use
• Use a small flat-blade screwdriver to turn the rotary switches; be careful not to damage the
switch.
• Always turn OFF the Controller before changing the unit number setting.
Additional Information
If the unit number is the same as one set on another CPU Bus Unit connected to the same CPU
Unit, a major fault level controller error "Duplicate Unit Number" will occur and it will not be possi-
ble to start up the DeviceNet network. After correcting the unit number setting, cycle the power to
the Controller.
Node Address Switches
CJ1W-DRM21
X 1 X
10
Use these switches to set the node address of the Unit.
Setting method: Two-digit decimal
Setting range:
Note The node address is set to 63 at the factory.
You can set any node address from 0 through 63 as long as it has not been set on another slave
node.
Additional Information
If the node address is the same as one set on another node, a node address duplication error
will occur and it will not be possible to start up network communications.
DIP Switch
The DIP switch on the front of the DeviceNet Unit is used to set the baud rate, whether communica-
tions will be continued or stopped when a communications error occurs, and whether to hold or clear
the remote outputs when a communications error occurs in the slave function.
CJ1W-DRM21
ON
Hold/clear I/O for communications error (when used as a slave)
Continue/stop communications for communications error (when used as a master)
Baud rate
The settings of the DIP switch pins are shown in the following table. All pins are set to OFF at the
factory.
Pin
1 Baud rate
2
3 Continue/stop remote I/O communi-
cations for communication errors
(when used as a master)
4 Hold/clear remote outputs for commu-
nications error (when used as a slave)
2-6
0
10
0 to 63
Function
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Setting
See the next table.
OFF: Continue communications
ON: Stop communications
OFF: Clear remote outputs
ON: Hold remote outputs