KEYENCE Visual KV Series - Manual (Page 270)

7.3 Installation KV-300 Series Only
KV
-300
KV-10/80
Chapter 7 KV-L2 Serial Interface Module
1-246
7
Setting the TERMINATOR (terminal resistor)
Turn off the power switch before setting the TERMINATOR switch.
When using the RS-422A communications mode, set the TERMINATOR selection
switches of the KV-L2s at both ends of the connection cable to ON.
Set the TERMINATOR selection switches of any KV-L2s connected between the
leftmost and rightmost KV-L2s to OFF. If set to ON, normal communications will not
take place.
Note: When setting port 2 to RS-232C mode, set the TERMINATOR selection
switch to OFF.
Setting the station no.
When the RS-422A communications mode has been selected, a station no. must be
assigned to each KV-L2 to establish which KV-L2 is to communicate with the
external unit (personal computer). Turn off the power switch before setting the
station no.
Note 1: When the KV-L2 is set to RS-422A communications mode, set the TERMI-
NATOR (terminal resistor) to ON.
Note 2: Set the terminators of the modules connected in intermediate positions
(between the leftmost and rightmost KV-L2s) to OFF.
Note 3: Do not assign the same station no. to more than one module; otherwise,
data communication will be disrupted.
Station no. setting dial
F
E
D
C
B
A
9 8 7
6
5
4
3
2
1 0
Set the station no. to a number within the range 0 to 9.
Do not assign the same station no. to more than one
KV-L2 module. The module is factory-set to 0.
TERMINATOR selection switch
ON OFF
TERMINATOR
Termination required: Set the switch to
the left (ON) position.
No termination required: Set the switch
to the right (OFF) position.
* *
In the figure above, only those KV-L2s marked with an
asterisk require their TERMINATOR switches set to ON.
KVHKA Chap 07_1to4.p65 08.3.11, 11:18 AM 246