Hello,
Do you know electricity? Do you know any kind of programming? Understanding basic electricity when used in PLCs would be the first. Stuff like the different kinds of voltages, circuits and how sensors transmit values to be read to the PLC would be the first element to consider.
You...
What if there is nowhere to practice???
I agree with your view. If I want to learn something, I'll find a book/website/something with the information I need and practice it... I learned most programming languages I know like this and began using different processors for the tasks I was taught...
Hello,
I am working on a ship where we're having several failures of our level sensors (pressure sensors) due to limescale deposits.
Does anyone here know how to avoid limescale deposits on these things or which product would be advisable to use for regular cleaning of these sensors?
Hello,
Some devices need a separate power, others can work with or without (although they are not common).
I don't know the final application so this advice may not be valid (This cannot be done in Ex environments, for example).
If you have a 2 wire transmitter, but no "active" AI card...
You'd need a bit to define if it's the first cycle (50 and 100 ms) or the second.
At the end of the rung you'd add another cycle to the counter.
Inc C1 // for example
If the counter1 equals 4, then set the bit, reset the counter.
Use the counter2 to define how many cycles of 100 and 300 ms...
Honestly, I fail to see the problem here.
Maybe it's me that has an open relationship with my manager, where I do not work for him but we work together (he puts in the experience and vision, I do the grunt work) that is different?
I actually want him to be on most of my emails for...
I worked as Service Engineer for quite some time and one of the things I pushed constantly (without much luck) was the quality of travel. One cannot expect a person (and I'm not exactly small) to travel across the world (Europe to Singapore/Korea) and be ready to take on a big day of work just...
One thing I consistently see in some PLC software (I am mostly using Simatic PLCs) is the hard coding of tolerances and limits in the code instead of keeping everything nice and tidy in an aptly named "XXXX CONFIGURATION" DB.
We have one of our suppliers that has a coding standard (showed to...
I think it always depends on the market... but I would flat out refuse travelling on a Sunday or leaving on a trip with a booked return on a Saturday for free. However, with the way the job market is at some places, bosses do have plenty of people to choose from to fill your place which leaves...
From your schedule, you'll need a counter.
After 4 cycles of 50 - 100 ms, you deactivate the 50 and 100 ms timers and activate the 300 and 100 ms for one cycle.
However, the schedule you have on top does not match the software comments... so I'm not sure what you really want.
First, there is some confusion between FCs and FBs.
An FC is a block of code without non-volatile memory. You can define variables inside the FC, but once it finishes processing the variables are erased from memory.
An FB is the same thing as an FC with the exception that you give it a DB to...
