0=HI4)+('()*(*2
Section 6-4
$)'
6-4
CAM-positioning
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
Application Description
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. MD292). In order to reduce the On/Off-response time for the outputs all
15 outputs are enabled to generate interrupts to the CS1-CPU.
Electronic C AM-shaft
Encoder
Motor
Position Angle
15 Digital Outputs controlling machine
according to Position Angle
CT041
No .
X101
MA CH
X100
RUN
CH1
CH2
CH3
CH4
ERC
ERH
A
A
A
A
B
B
B
B
Z
Z
Z
Z
I0
I1
I2
I3
O0
O1
O2
O3
PS204S
Po wer
AB
AB
CN 1
CN 2
CN1
CN 2
BA
A
B
OUT
IN
MD292
0
8
ERR
1
9
2
10
3
11
5
13
7
15
4
12
6
14
0
8
1
9
2
10
3
11
5
13
7
15
4
12
6
14
W902-E2-03.book Seite 164 Donnerstag, 7. Oktober 2004 2:06 14
Содержание CS1W-CT021
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