In this animated object, learners examine three data compare instructions used by programmable logic controllers (PLCs). A practical application to show how these instructions are used in an industrial setting is provided.

Learners examine the two methods used by programmable logic controllers to perform a counting operation using addition or counter instructions. A brief quiz completes the activity.

In this animated object, learners examine how to use a programmable logic controller as an alternative to hardwiring a ladder logic circuit.

Learners examine an animated view of the operation and programming requirements of a PLC Examine-On instruction. A brief quiz completes the activity.

Learners observe how to cascade PLC counters to extend the maximum count of one counter.

In this animated object, learners study the problems that develop if the scan time of a PLC is too slow.

In this interactive object, learners view a practical application of a PLC Timer-On function.

Learners study the descriptions of the three words in a PLC timer: EN, DN, and TT. They then test their knowledge in a brief quiz.

In this animated object, learners examine how PLC up/down-counters are used to control an automated parking lot gate.

Learners examine the functions of the three types of memory used by an Allen-Bradley SLC-500 programmable logic controller: the Executive ROM, Scratch Pad, and Processor File.

In this animated object, learners examine how to wire field devices to a PLC sinking input module.

Learners examine the sourcing and sinking of conventional current at a PLC output module and the type of field device to which it is connected. This interactive learning object includes six quiz questions.

Learners examine the three steps of a processor scan cycle.

Learners view an animation showing the one-shot operation of a programmable logic controller.

Learners study the method of cascading two or more PLC timers to extend their time capacity.

In this animated activity, learners study how a PLC performs a shift operation. The learning object covers data movement, data entry, PLC wiring, PLC shift register introductions, and programming for a paint can operation.

Learners consider the correct type of pushbutton to use as a Stop button, the way the Stop button should be hard wired, and the PLC input instruction to use. This animated object includes a short quiz. It is recommended that learners review the learning object “The PLC Examine-Off Instruction” before beginning this object.

In this animated learning object, students examine the addresses of PLC elements and how they pertain to I/O connections and internal memory files.

In this animated object, learners examine the proper way to reset a counter instruction in a programmable controller.

Learners study an animated PLC counting operation and examine how the count is automatically reset.