Rotary Switch Settings; Dip Switch Settings - Omron V680-CA1D User Manual

Section 3
Before Communications

Rotary Switch Settings

• Node Number Switch Setting (SW1)
If more than one Controller is connected to a single host device, the host device needs to be able to
distinguish each of them. The ID number used for this purpose is called a node number. Each
Controller must have a unique node number. Each command and response includes the node number
of the Controller. Communications will not be possible if the node number is wrong. The node numbers
must be correctly set regardless of whether the host device is connected to a single or multiple
Controllers.
As shown in the following table, the node number switch can be set from 0 to 9.
The node number switch is factory-set to 0.
• System Reserved Switch (SW2)
Do not use this switch. Always set this switch to 0.

DIP Switch Settings

• SW3
Pins 1 to 6 and pin 8: Reserved by the system
Do not use these pins. Always set these pins to OFF.
Pin 7: Not used (V680-CA1D)
Do not use this pin. Always set this pin to OFF.
Pin 7: RS-485 terminating resistance (V680-CA2D)
If two or more Controllers connected to the host device, terminating resistance of the Controllers at
each end or the host device must be set to ON for stable communications.
Use this pin to set the built-in RS-485 terminating resistance to ON or OFF.
SW3, pin 7
Be sure to set only the terminating resistance of the serially connected Controllers or host devices at each end to ON
and that of any other device to OFF. Incorrect settings will result in unstable operations.
Heat-resistive RFID System
40
User's Manual
SW1 Node No.
0
1
2
3
4
5
6
7
8
9
ON RS-485 terminating resistance ON
OFF RS-485 terminating resistance OFF
0
1
2
3
4
5
6
7
8
9
Meaning
Setting Examples
Node No. 0
Node No. 1