Festo CPX-P-8DE-N Series, Описание

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3. Input module CPX-P-8DE-N-...
3-18
Festo P.BE-CPX-P-EA-EN en 1209NH English
3.3.3 Selecting the operating mode
If the miniature switch ( section 3.2.1) of the module is set
to OFF, the module makes all 8 channels available as digital
inputs according to EN 60947-5-6 (operating mode A).
If the miniature switch is set to ON, the desired operating
mode must be activated for input channels 0 ... 3 by means of
parameterisation (
Tab. 3/20).
Input channels 4 ... 7 can be used exclusively as digital inputs
- independent of the setting of the miniature switch.
3.3.4 Operating mode A - digital input
Certain parameter alterations cause an initialisation of the
respective channel. (
section 3.3.8).
In the digital input operating mode the applied signal is con-
verted into a digital signal (0/1) in accordance with specifica-
tion EN 60947-5-6 (Namur) and stored in the corresponding
bit in byte 0 of the PII. If an error occurs (e.g. short circuit,
overload, wire break, etc.), the last correct value or the para-
meterised replacement value is valid depending on paramet-
erisation (Tab. 3/28 and Tab. 3/29).
A signal extension time ( Tab. 3/24 and Tab. 3/25) and an
input debounce time ( Tab. 3/26 and Tab. 3/27) can be
activated by means of parameterisation.
Detailed information regarding the signal extension time and
input debounce time parameters can be found in the CPX
system description. In the CPX-P-8DE-N-..., however, these
parameters are channel-specific and influence the behaviour
of an individual channel.