Omron CJ1W-CT021 Operation Manual page 171

Length Measurement
Removing objects
Digital Input I1
(= photo-electric sensor D 2)
Digital Output O0 ON
Digital Input I1
Logically AND Output
Patterns Counter 1 and 2
Output Pattern Counter 1:
Output Pattern Counter 2:
Unit Output Pattern:
DM-configuration
Timing the correct moment to remove an object for the pusher is done by the com-
bination of encoder 2 and photo-electric sensor D2. Objects are removed by the
pusher which is located at conveyor belt 2. Photo-electric sensor D2 is connected
to Digital Input I1. Digital Input I1 controls Counter 2 and is assigned Digital Input
Function 5 (Reset Rising Edge).
Object p asses D 2
At the rising edge of Digital Input I1, when an object leaves the beam of the photo-
electric sensor, Counter 2 is reset but continues counting. When the Counter
Value enters Range 0 Digital Output O0 is turned ON.
The pusher (i.e. Digital Output O0) is controlled by logically AND-ing the output
patterns of Counter 1 and 2. This means that the pusher is activated when both
output patterns of Counter 1 and 2 have turned ON bit 0 (= Digital Output O0).
31
31 30 29 16 15 14
31 30 29 16 15 14
31 30 29 16 15 14
Consequently the pusher is activated for 1 second when Counter 1 has measured
an invalid sized object AND when Counter 2 has determined that the object is in
front of the pusher.
The Machine Number of the High-speed Counter Unit is 0. The High-speed Coun-
ter is allocated 40 CIO-words starting from CIO 2000 (n = CIO 2000 + 0 x 10) and
400 DM-words starting from D 20000 (m = D 20000 + 0 x 100). The Range Data
of Counter 1 is stored in DM starting from D500 and the Range Data of Counter 2
Reset Counter 2 at R ising Edge
(Digital Input Function 5)
0 3000
Range 0
4
6 5 4
6 5 4
6 5 4
Section 6-2
time
3500
Counting R ange
Circular Counter 2
3 2 1 0
3 2 O1 O0
3 2 O1 O0
Logical AND
3 2 O1 O0
151