User guide

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Digital-Input
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Description
It reads a bit of digital input (DgtZn) specified by input selector (Sel) when different from zero, otherwise
output (Out) is equal to the input (In)
A standard method to handle and read digital inputs is provided with this compound block.
Control developed by the user may have a lots of functions. Each function can be enabled or disabled depend-
ing on its associated variable Fnct. This variable can be manually set by the user or read from a digital input
selected by another variable FnctSel. If this variable is zero Fnct variable is not read from digital input
(digital inputs from 1 to 8 are available) and can be manually modified, otherwise FnctSel-th digital input is
read and assign to Fnct.
The following drawing shows a possible usage of this compound block:
Digital-Input
Ida block reads all digital inputs using for example Bitword PadA par.N. 519, DigitalJqut compound block
reads desired digital input from 1 to 8 according to FnctSel variable and the result is assigned to Fnct vari-
able. Instead, if FnctSel is zero Fnct variable is left unchanged. Iass block is used to store Fnct variable and
send read input at the same time.
So two variables (Fnct and FnctSel) are need for each function user wants to enable or disable using a
selected digital input.
C-style description
if (Se1 != 0)
/* reads (Sel-l)-th bit of DgtIn input. Note bits of integer number is numbered from 0 to 7 */
Out=rbit@gtIn, Sel-1);
else
out=In;
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