PLC Compare Instructions: Traffic Light Programming Secrets

We will now look at the PLC fiddle traffic light solution using the compare instruction. Just about every program usually has some data comparison instructions. This is the ability to compare information across different areas of the controller and act on the results. The output of these comparison conditions determines the logical continuity of a rung. PLC Fiddle is a free online browser simulator and has 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) We will be looking at these instructions along with some programming challenges. As a system integrator, this ability can prove very useful to you in the field when commissioning your automation system. We will review these comparison instructions and outline the parameters required to program them. Our comparison challenges will help you gain a good understanding of how we can use comparison in the PLC. Trying these challenges with PLC Fiddle is fun and will help you with PLC programming. Let's get started. More information can be obtained on our Website. This includes all challenge links for all compare ladder logic. https://accautomation.ca/plc-fiddle-compare-challenge Simple Traffic Light Challenge https://www.plcfiddle.com/challenge/232ad708-e4db-4e0c-bfc7-2353104ba249 Motor Starter Service Stop Challenge https://www.plcfiddle.com/challenge/5e177293-0184-4888-b532-7f0a16ade044 Solution https://youtu.be/p8pcKY4_CJI Flasher Challenge https://www.plcfiddle.com/challenge/bc3e4866-68d4-4544-b2fa-897942e2e26c Solution https://youtu.be/i3MZ03018lM Simple Traffic Light Challenge https://www.plcfiddle.com/challenge/232ad708-e4db-4e0c-bfc7-2353104ba249 Solution https://youtu.be/fc2IkKwOccU PLC Fiddle 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 in this virtual PLC software. PLC Fiddle is helpful to you in learning and understanding PLC concepts. Using the simulator you can test your circuits by monitoring and testing all of the input condition. Previously posts on how to use PLC Fiddle and challenge links: PLC Fiddle – Online Editor and Simulator in your Browser http://accautomation.ca/plc-fiddle-online-editor-and-simulator-in-your-browser PLC Fiddle Video https://youtu.be/G43ZLOwu2dM PLC Fiddle Basic Gate Ladder Logic Challenges http://accautomation.ca/plc-fiddle-basic-gate-ladder-logic PLC Fiddle Timer Challenge http://accautomation.ca/plc-fiddle-timer-challenge - PLC Fiddle On Delay Timer Challenge https://www.plcfiddle.com/challenge/bb456921-7112-46d8-9480-dade02c03812 - Solution https://youtu.be/rzJHS7FquFg - PLC Fiddle Off Delay Timer Challenge https://www.plcfiddle.com/challenge/a6b3799d-c844-42a4-bcc5-1852b351c09d - Solution https://youtu.be/dDSd5JbXoAM - PLC Fiddle Pulse Output Timer Challenge https://www.plcfiddle.com/challenge/21cfe08f-1335-47e9-8ffd-79581709f1c8 - Solution https://youtu.be/5VJcwwc1nDY PLC Fiddle Counter Challenge http://accautomation.ca/plc-fiddle-counter-challenge - Motor Starter Service Counter Challenge https://www.plcfiddle.com/challenge/18f359d2-75d8-46b5-93bc-96420488c03b - Solution https://youtu.be/Y_MQ0B3XQu0 - Count Down Challenge https://www.plcfiddle.com/challenge/1230fa28-9353-462e-b10d-9ff1405700c4 - Solution https://youtu.be/avbktWad6tw - Hour Minute Second Counter Challenge https://www.plcfiddle.com/challenge/5faac6c6-5598-4c29-bd56-94a5ad6125bb - Solution https://youtu.be/wP7HDQbbTfg PLC Fiddle Math Challenge http://accautomation.ca/plc-fiddle-math-challenge - Occupancy Count Challenge https://www.plcfiddle.com/challenge/0cdd0e1b-859b-43a1-b107-44c9893bdddd - Solution https://youtu.be/ZBpTYZKU5Qw - Degree F and C Challenge https://www.plcfiddle.com/challenge/2284a381-b046-4e88-ac74-4699fd7de538 - Solution https://youtu.be/mIGmsDn_fVs - Determine the Scan Rate of PLC Fiddle https://www.plcfiddle.com/challenge/ab949b6a-c933-4b63-9bb2-76beaa29230b - Solution https://youtu.be/zjWaJH8TI9s http://www.accautomation.ca