Tag Archives: less than or equal

BRX Do-More PLC Compare Instructions

Compare instruction is often used in PLC programs to test pairs of values. The output of this comparison conditions the logical continuity of a rung. The BRX Do-More series of programmable logic controllers have the following compare contact instructions.
= (if Equal contact)
<> (if Not Equal contact)
> (if Greater Than contact)
>= (if Greater Than or Equal contact)
< (if Less Than contact)
<= (if Less Than or Equal contact)
Besides this instruction, the BRX Do-More PLC will also have to compare instructions for the built-in real-time clock of the system. We will be looking at these instructions along with some programming examples. As a system integrator, this ability can prove very useful to you in the field when commissioning your automation system.
Let’s get started with the BRX Do-More PLC Compare Instructions. Continue Reading!