Sices HS 315, Technical Handbook

Page: 37 / 255

Technical Handbook 19
In addition to the 12 digital physical inputs and the 32 of the DITEL modules, the controller
also operates 16 virtual digital inputs. The same are operated by the controller just as if they
were physical inputs (with no limitation), but the status of the virtual inputs is not acquired from
the hardware, but it is determined through the software. In fact, every digital input can have an
AND/OR logic associated, which determines its status (see par. 0).
A practical example of use. Suppose you want to activate a warning if the auxiliary source
voltage exceeds the tolerance thresholds. Let us use the virtual digital input #1 (as example).
•
Using the BoardPrg3 software we associate an AND/OR logic configured as AND to
the virtual digital input #1, with the following list of conditions:
▪
ST.060
(“GCB Status”)
▪
ST.017
(“Auxiliary source absent or out of tolerance”).
•
The virtual digital input will therefore be active when the GCB is closed and the
auxiliary source is out of tolerance.
•
Let us set the DIF.4001
function (“Generic warning”) within the P.2151 parameter.
•
Let us set the desired delay (for example 0.5 s) within the P.2152 parameter.
Let us set the alarm message (for example “auxiliary source voltage warning”) within the
P.2153 parameter.
If not used as measurement inputs, you can also use, as digital inputs, the analogue inputs
JM, JQ and, with different methods, also terminal JL-4 (see related chapters).
You can also increase the number of digital inputs by adding two optional DITEL 16 IN modules
connected to the HS315 via CAN-BUS, up to a total number of 32 additional digital inputs
(refer to par. 5.6.2).
By default, all the digital inp
uts on the HS315 are considered “active” when the related terminal
is connected to the supply minus of the controller; they are considered “not active” when the
related terminal is not connected to anything. The logic state of the input can be reversed with
respect to the physical state by ticking the “Reversed polarity” box on the input configuration
page on BoardPrg3. The box is only visible if the function selected is other than DIF.0000
–
“Not used”.
You can also reverse the logic state (still individually for each input), by operating directly on
the controller, using the parameters P.2000 (for inputs 1...12 found on the controller), P.2100
(for the analogue inputs when the same are used as digital), P.2200 and P.2250 for the 32
optional inputs of the two DITEL expansions.
Those parameters have a bit for each input:
•
A bit set to zero
means that the related input is “active” when it is connected to the
negative supply of the controller.
•
A bit set to one means that the related input is considered “active” when it is left open
(connecting the input to ground will change to “not active” the status).
Bit mapping of parameter P.2000 is:
BIT Value Hexadecimal Input
0 1
0001
Input 01 (JN-1)
1 2
0002
Input 02 (JN-2)