During the last post, we had a quick look at including some diagnostic indicators to a circuit Today we will apply this to a circuit that could be used in a pump application. You will note in this circuit that I have used quite a few relays. The first relay you will note is in …
We have had a look at a few control circuits during some of the posts and now it is time to make it a bit more interesting. What we will do is to build some diagnostic tools into the circuit that will assist you in fault finding. Start with the very basic Direct on …
Just having a look at some of the posts and decided to once again add something different. This post is a contribution from Ron Columbine and I decided to post it exactly as Ron wrote it. Thanks for the contribution Ron, I agree with you, Safety is Essential in our trade. Ron’s document: As maintenance …
Just a very quick post on thermal overloads and the dangers lurking within some of the functionalities available. You would no doubt have seen that there is a manual or auto selection available on the front of the overload unit. When set to manual, it means you have to reset the overload by pressing the …
I thought we could spend a bit of time looking at something you would come across quite regularly. Actually, you are bound to find this on almost every machine. I am talking about a remote stop/start station. Now consider the circuit. On the control board you have a stop and start, and somewhere near the …
Just another very short post, sorry The manual I am working on is nearing completion and this is probably a good opportunity to let you know about it. Basically the concept is to create a reference manual that you could use in different environments with information on fault finding etc. At this stage I am …
Just been looking at some circuits and something that we need to look at keeps coming back. The fact that you open a control cabinet when having to find a fault only to realise that there are no schematics available, is something that just wastes so much time. When you look at how the circuit …