Cam-Positioning - Omron CJ1W-CT021 Operation Manual

CAM-positioning

6-4

CAM-positioning

Application Description
Encoder
Covered configuration items in this example:
• Circular Counter
• Range Mode, setting Range Data
• Interrupts (Outputs generating interrupts)
• Hysteresis
• Input Signal Type, Phase Differential, multiplication x4
• Resetting a Counter with the Z-input combined with the Software Reset Enable
bit
In this example 15 outputs of a machine are controlled according to the position
angle of the "electronic CAM-shaft" that is driven by a motor. The position angle is
measured by counting the pulses of an incremental encoder that is connected to
the CAM-shaft.
In order to increase the resolution of the encoder the Input Signal Type for Counter
1 is set to "multiplication x4". The Z-phase of the encoder is used to reset the
Counter together with the Software Reset Enable bit (make sure that CIO n+2, bit
05 is set).
The 15 outputs are controlled by the PLC ladder program via an additional Output
Unit (e.g. CJ1W-OD231). In order to reduce the On/Off-response time for the out-
puts all 15 outputs are enabled to generate interrupts to the CJ1-H CPU Unit.
CT021
RUN ERC ERH
CH1 A B Z I0 O0
CH2 A B Z I1 O1
20 20
CN1
MODE
1 1
B A
Electric CAM-shaft
OD231
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
0 1
1 1
20 20
A B
15 Digital Outputs Controlling Machine
according to Position Angle
Section 6-4
Position Angle
Motor
159