AutomationDirect DL105 - Comparative Boolean

Standard
RLL Instructions
5--6
Standard RLL Instructions
Boolean Instructions
DL105 PLC User Manual, 3rd Edition
You can combine the various types of series and parallel branches to solve most any
application problem. The following example shows a simple combination network.
OUT
Y0X0
END
X2
X3X1
X4
X5
X6
Some PLC manufacturers make it really difficult to do a simple comparison of two
numbers. Some of them require you to move the data all over the place before y ou
can actually perform the comparison. The DL105 Micro PLCs provide Comparative
Boolean instructions that allow you to quickly and easily solve this problem. The
Comparative Boolean provides evaluation of two 4-digit values using boolean
contacts. The valid evaluations are: equal to, not equal to, equal to or greater than,
and less than.
In the following example when the value
in V-memory location V1400 is equal to
the constant value 1234, Y3 will
energize.
Y3
OUT
V1400 K1234
Combination
Networks
Comparative
Boolean