Watlow LogicPro - Manual (Page 159)

LogicPro User’s Guide Chapter 10: Function Blocks
Doc.# 28002-00 Rev 3.00 Watlow Anafaze 143
Ladder Diagrams program, the value of CLR is always False.
In FBD, all inputs must be connected to a Variable.
Outputs
Q is the Scan Time Counter output bit. This bit is enabled and
passes power while a True condition of the enable bit occurs.
TIME is the scan time Variable. The value of this Variable
indicates the scan time in thousandths of a second.
MIN is the minimum scan time Variable. The value of this
Variable indicates the minimum scan time in thousandths of a
second since the program started running.
MAX is the maximum scan time Variable. The value of this
Variable indicates the maximum scan time in thousandths of
a second since the program started running.
Move (MOVE)
The Move (MOVE) function block, shown in Figure 10.23,
places the value of one Variable into another Variable.
MOVE places the input Variable (INP) value in the output
Variable (OUTP) while the enable bit (EN) is True. The output
bit (Q) always assumes the value of the enable bit; therefore,
when the enable bit is True, the output bit is also True. The
symbolic Variables for INP and OUTP must be either INT or
LONG. When the enable bit is False, the OUTP Variable retains
its last value.
Figure 10.23 Move Function Block
Inputs
EN is the MOVE enable bit. A True condition of this bit copies
the value of INP to OUTP. In a program using Ladder logic, the
value of EN is determined by the Boolean evaluation of
elements placed between the left power rail and EN in the
function block. In FBD programs, the value of EN is
determined by the Variable connected to EN. If no contacts are
placed on the rung before EN in a Ladder Diagrams program,
the value of EN is always True. In FBD, all inputs must be
connected to a Variable.