TechTalk : Editing Logic Online In RSLogix 500

Online editing function in RSLogix software allows PLC programmers to monitor and correct the logic live. You can see all the instantaneous values which makes it a good debugging tool as well.  You can make logic modifications such as insert, edit and delete logical instructions. Zone markers (denoted by red colour in the rung number) Read more about TechTalk : Editing Logic Online In RSLogix 500[…]

TechTalk – Allen-Bradley ControlLogix : Battery

Up-to-today, conversations of ControlLogix CPU battery only exist in sporadic, small chat rooms, and/or email conversation between Allen-Bradley distributors and end-users. I wanted to break out of this “cage” and share some of my professional and technical experience about these batteries, cost, after market solutions to everyone, and hopefully it might allow you to make Read more about TechTalk – Allen-Bradley ControlLogix : Battery[…]

TechTalk – Allen-Bradley Stratix 8000 : Putting To Factory Setting And Express Setup

When you want to initially setup your Stratix switch right off the box, you will want to utilize the Express Setup to assign an initial IP address to which you can used to configure the switch. The Express Setup also run Global macros to perform initial configuration for the switch. However, functions like VLAN setup, Read more about TechTalk – Allen-Bradley Stratix 8000 : Putting To Factory Setting And Express Setup[…]

TechTalk – Allen-Bradley PLC-5 : Battery… Everything You Want To Know

The Allen-Bradley PLC-5 battery indicator (BATT) warns you when the battery has gone below the low threshold. This BATT LED indicator first lights when the processor has 10 days worth of battery back-up power remaining, regardless of whether the processor is powered or not. This article focus on how to determine if the PLC-5 battery Read more about TechTalk – Allen-Bradley PLC-5 : Battery… Everything You Want To Know[…]

TechTalk : Rockwell PLC Battery Models

This article is for reference for anyone who is looking to replace or get a new PLC batter for any Rockwell PLC. This is just a reference and I got the information from Rockwell website therefore I don’t take any credit for this document. Also the tables are from Rockwell document. I seen the Rockwell Read more about TechTalk : Rockwell PLC Battery Models[…]

TechTalk – FactoryLink : DBLog, Database and Troubleshooting

When you check your Run-time Manager, the DBLog Task button has a red background with the following error message. You check your database tables in the Microsoft SQL Server Management Studio and some database tables are populating and some are not. Your disk space is enough and you know you a large RAM. Checking your Read more about TechTalk – FactoryLink : DBLog, Database and Troubleshooting[…]

TechTalk – Electronics : Pull Up Resistors, Pull Down Resistors

Straight off of Ardunio’s web page (see reference below)…. ‘Just because you have nothing at all connected to an input pin doesn’t mean it is a logical zero.’ Pull-up resistors are installed in an electronic circuits to ensure that inputs to board settles at expected logic levels (one or zero) if external devices are disconnected Read more about TechTalk – Electronics : Pull Up Resistors, Pull Down Resistors[…]

TechTalk – FactoryLink : Database Troubleshooting

You look at Run-Time Manager and see it has a red background button what used to be green (which meant good task in Run-Time Manager). Next to it, there are some cryptic message from the Run-Time Manager saying “Historian SQL error: EXEC(17,-1)”. Ok now what is that? Well have no fear. I have consolidated guidelines Read more about TechTalk – FactoryLink : Database Troubleshooting[…]

TechTalk – Rockwell : Data Highway Networking Best Practice

Throughout my whole career, I have see Data Highway Plus (DH+) built with good intention but as the facility matures, due to the cocktail of “project compartmentalization” and “tunnel vision” of project … and budget or course, this network design best practice get neglected. And DH+ no doubt being a very rugged communication protocol, will Read more about TechTalk – Rockwell : Data Highway Networking Best Practice[…]

TechTalk : RSLogix 500 – AFI Alternates

The AFI (also known as Always False Instruction) is a ladder logic rung instruction that sets the rung output to false; generally for the purpose of debugging and trouble shooting the logic.     In the world of Rockwell-AllenBradley, AFI instructions set is only available in RSLogix5 (PLC5) and RSLogix500 (ControlLogix). There is no built-in Read more about TechTalk : RSLogix 500 – AFI Alternates[…]