Watlow LogicPro - Manual (Page 181)

LogicPro User’s Guide Chapter 10: Function Blocks
Doc.# 28002-00 Rev 3.00 Watlow Anafaze 165
N-- is an integer ( INT ) or long integer ( LONG ) specifying the
number of bits the shift should be done for per scan.
D-- is the INT or LONG integer Variable on which the shift is
to be performed (also an output).
Outputs
Q-- is the shift function’s output bit. The output bit is disabled
if the enable bit is False and is enabled as soon as the enable
bit is True.
D-- is the shift function’s output destination (as well as input).
The
INT integer or LONG integer will be replaced with the
result of the shift operation.
Negation (NEG)
symbol1 = NEG
The NEG function block, shown in Figure 10.47, implements
a bitwise-NOT and complements the lowest bit (two’s
position).
symbol2 = W, L, WP , or LP
Variable A and B need to be declared as integer type, of size
specified in this symbol, as follows. Two memory sizes are
available for this integer, word-length W (16-bit) and long-
word L (32-bit). In addition, the function block’s calculation
can be performed continuously, or only as pulses, when the
enable bit (EN) switches value from False to True. In the
continuous computation case, integers are marked as W or L,
while in the Pulse computation case, they are marked as WP or
LP.
Figure 10.47 The Negation Function Block
Inputs
EN-- is the NEG function block’s enable bit: the conversion is
performed if it is True.
A-- is the integer ( INT ) or long integer ( LONG ) Variable to
have NEG performed on it.