plc programming ladder logic

PLC Fiddle Timer Challenge – Timing Instructions

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Timers are present in just about every PLC program that I have seen. A timing chart is a secret behind understanding the timer that you need in your application. Making a timing chart before writing the program will ensure that all of the information will be accounted for. The secret to using timers is a … Read more

Productivity 1000 PLC Data Handling Part 2

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Data handling instructions are used to perform movement and manipulations of the memory in the programmable logic controller. The Productivity 1000 Series PLC has fifteen different data handling instructions that can be used in a wide variety of applications. In this second part we will be looking at the following instructions: Lookup Table (LKUP) – … Read more

Productivity 1000 PLC Data Handling Part 1

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Data handling instructions are used to perform movement and manipulations of the memory in the programmable logic controller. The Productivity 1000 Series PLC has fifteen different data handling instructions that can be used in a wide variety of applications. In this first part we will be looking at the following instructions: Absolute Encoder (ABSE) – … Read more

PLC Fiddle Basic Gate Ladder Logic

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PLC Fiddle Basic Gate Ladder Logic - AND, OR, NAND, NOR, EXOR and EXNOR

Last time we discussed the free virtual plc simulator called PLC Fiddle. It will enable you to create simple PLC ladder logic code within your browser. This is an ideal way in understanding PLC concepts for industrial automation. All of the basic PLC instructions that come with most plc units have been incorporated into this … Read more

Productivity 1000 Series PLC Math Instructions

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Math instructions are used to perform mathematical calculations. The Productivity 1000 Series PLC has math instructions that can be used in a wide variety of applications. We will be looking at the Data Statistics (DATA) and the Math Editor (MATH). The automation system that you implement may involve these instructions. As a system integrator, you … Read more

Productivity 1000 PLC Counter Instructions

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A majority of programmable logic controller (PLC) programs will include a counter instruction. The Productivity 1000 Series PLC has a couple of different counter instructions for your program. Under the data handling instructions, we have the increment/decrement instruction (INC). We could use this with the compare contact (CMP) instruction that we discussed in our Contact … Read more