NOVUS AUTOMATION
10/34
Fig. 14
– NTC
5.2
DIGITAL INPUTS
DigiRail Connect
has versions with 4 channels and 8 channels of digital inputs, identified as
D1 ... D4 ... D8
, on its front panel. These digital chan-
nels are suitable for receiving Dry Contact, NPN and PNP electrical signals.
Each channel can be configured through the
NXperience
configurator software (see the
chapter).
Fig. 15
– Digital Inputs
The digital inputs can perform different functions, which will be defined during configuration (see
section of the
chapter). The functions available are:
•
Logical State:
Allows the digital input to read the logic state of the signal applied at its terminals:
0
or
1
.
•
Counter:
Allows the digital input to count the number of pulses received at its terminals. As a reference for incrementing the count, you can
use the rising edge (transition from
0
to
1
) or the falling edge (transition from
1
to
0
) of the received pulse.
•
Integrator ON/OFF:
Allows the sum (integration) of the time intervals measured with the digital input in logic state
0
to be performed and also
the sum of the time intervals measured with the digital input in the logical state
1
. It will provide the two information separate. Value displayed in
seconds.
In addition, the
Integrator ON/OFF
and the
Counter
functions have the
Preset
function, which allows you to set an initial value for the pulse count
or the sum of the digital input ranges to
0
and
1
.
For the
Dry Contact
signal type, there is the
Debounce
feature, which allows defining a time interval to be disregarded by the digital input at each
logical state transition.
5.2.1
FLAGS D1 ... D8
The flags
D1
...
D8
, when lit, indicate the logic state of the signal applied to the terminals of the respective digital input.