Pilz PSSu E S INC - Manual (Page 24)

4.1 Module features
4 Function description
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Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-8
The contents of the latch memory remains in the process image of in-
puts until the module signals a new memory value by setting the status
information. Before the initial transfer the process image of inputs con-
tains 0000 0000
H
or FFFF FFFF
H
The module always transmits the counter status when the first latch
pulse occurs after the function has started. All subsequent latch pulses
are ignored until the function is completed and reset.
4.1.5.3 Transfer counter status via zero pulse
Transfer counter status via zero pulse 4- ][Funktionsbeschreibung_Ein ST-INC BA Null
The output for the incremental encoder's zero pulse is connected to in-
put C (C+/C-). An incremental encoder typically supplies one zero pulse
per rotation. Using the zero pulse function it is possible to record the last
counter status before the zero pulse and transmit it via the process im-
age of inputs.
Key:
 PIO: Bit 0 of the function call in the process image of outputs or I/O
data OutputData.ZeroPulseActive
 C: Input C
 PII: Bit 0 of the status byte in the process image of inputs or I/O data
InputData.ZeroPulse
INFORMATION
In "Counter" mode, a rising edge at input C stops the counter.
a b
PAA
C
PAE
c d e