Click PLC Real Time Clock (RTC) – Ladder Logic

The click plc has a real-time clock that will allow us to control outputs based on a date or time of day. This real-time clock (RTC) can be set from the click programming software or through the program of the controller. Our programs in the click can use the following calendar and clock values: SD19 … Read more

P1AM Industrial Arduino Watchdog Timer

A watchdog is a piece of code that will timeout when an error occurs in our program. It will usually cause the CPU (program/sketch) to stop or reset. We will now look at the instructions for the watchdog timer in productivity blocks. This includes the Configure Watchdog, Start Watchdog, Stop Watchdog, and Pet Watchdog. Our … Read more

Productivity Open P1AM Arduino Time Instructions

Time instructions in our productivity blocks programming (Arduino sketches) consist of runtime (ms), runtime (us), delay ms, and delay microseconds us. We will be looking at each of these instructions that are available for our program using productivity blocks. Delay instructions in our sketches should be used with caution. They will pause our program for … Read more

PLC Fiddle Timer Challenge – Timing Instructions

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 Series PLC Timer Instructions

Just about every programmable logic controller (PLC) program will include a timer instruction. The Productivity 1000 Series PLC has several different timer instructions for your program. We discussed the timed coil (TMC) and flasher coil (FLS) last time as part of the contacts and coil discussion. (Contact and Coil Instructions – Video) We will now … Read more

BRX Do-More PLC Timers – How to Use

A majority of the programmable logic controller (PLC) programs will include a timer instruction. The BRX Do-More series of programmable logic controllers have several different timers available for your program. There are nine different basic timing instructions in the PLC. The memory area for timers includes the Timer PVs (Present Values) Timer SVs (Set Values) … Read more

Omron CP1H PLC Programming Timers

The Omron CP1H series of programmable logic controllers are capable of having 4096 timers. There are twelve different timing instructions in the PLC. Six binary and six BCD instructions for the set values of the timers separate the six basic instructions. The memory area for timers has separate areas for the Timer PVs (Present values) … Read more

Horner XL4 Timers and Counters – All In One

Timers and counters are used in the majority of PLC programs. We will not look at how timers and counters can be programmed in the Horner XL4 OCS all-in-one controller.

Click PLC Drum Instruction Sequence

Drum instructions are great tools when you have a simple sequence of events that need to occur at a set time interval or as a result of an event. They mimic an electromechanical drum sequencer. The Click PLC has a drum in the instruction set. We will discuss the drum instruction and look at an … Read more

PLC Programming – Delay Starting of 7 Motors

PLC Programming Example – Delay Starting of 7 Motors

We will look at a PLC programming example of delaying the start of 7 motors. Each motor will be on a switch that the operator can select at any time. The motor outputs should have a 5-second delay between the outputs coming on. This question originally came from PLCTalk.net. An original solution to the problem … Read more