
Digital output: DC 24V
500 mA
High-side (source)
Encoder mode: 24V HTL signal
Phase A and B
100 kHz
4-fold evaluation
Chapter 4.9.2.2 ‘Encoder - deployment’ on page 81
4.9.1 Objects
DIO Control
‘0x7100-01...04 - Digital input configu-
ration I/O1...I/O4’ on page 104
à
DIO
Control
à
‘0x7100-05 - Digital input states
‘0x7200-01...04 - Digital output configu-
ration I/O1...I/O4’ on page 106
‘0x7200-05 - Digital output states I/
O1...I/O4 actual states’ on page 107
‘0x7200-06 - Digital output states
I/O1...I/O4 requested states’ on page 108
4.9.2 Usage as input for encoder
4.9.2.1
Encoder - signal evaluation
n
Incremental encoder are sensors for detecting angular or positional changes.
n
Depending on the sensor type and the desired resolution, the scanning happens by
sliding contact, photo electrically or magnetically.
–
The scanning via
sliding contact
works in principle like a switch, which is mechan-
ically operated.
–
With the
optical scanning
a disk, which has a fine raster, is optically scanned.
–
With the magnetic scanning a pole wheel or magnetic band is scanned which has
been written with a raster by a magnetization, before.
n
The incremental encoder has two sensors
Track A
and
Track B
for scanning.
n
The sensors are arranged at an angle of 90 degrees from each other on the system
to be scanned.
n
In a rotational movement of the system, the sensors generate a specific number of
pulses. These are a measure of the covered angel or way. With the electrical phase
shift of the two signals the direction of rotation can be determined.
–
If the axis rotates to the right, then the signal of
Track A
is leading 90° towards the
signal of
Track B
.
–
If the axis rotates to the left, then the signal of
Track A
is lagging 90° towards the
signal of
Track B
.
n
During the sensor evaluation from the difference between two counter values the
velocity and direction can be determined.
Structure
Signal evaluation
VIPA System SLIO
Deployment
Deployment I/O1...I/O4 > Usage as input for encoder
HB300 | FM | 054-1CB00 | en | 18-06
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