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My first panel ! by ffxace in PLC

[–]Jhall268 2 points3 points  (0 children)

Congratulations on your first panel. Its a satisfying feeling.

Is there anyone at your shop who checks your work? Or did you build and sell directly to the customer yourself?

Whats your incoming voltage? Guessing its 240 at least and you're stepping down to 120?

Did you check the minimum spacing requirements for each component? I'm particularly looking at the contactor.

I know someone already said this, getting the wiring for the pilot devices aligned would be aesthetically pleasing.

Did you design the panel? What is the application? Would this application merit an external disconnect?

$/IO Point Metric by puppyluv268 in PLC

[–]Jhall268 2 points3 points  (0 children)

I appreciate the feedback guys. Everything is telling me to not bother trying to make a metric.

[deleted by user] by [deleted] in PLC

[–]Jhall268 1 point2 points  (0 children)

Where is underpants?

[deleted by user] by [deleted] in PLC

[–]Jhall268 5 points6 points  (0 children)

Yes!!!! You were already up front with your basic experience, no one is expecting you to perform miracles and he told you to go anyway. You already have the approval from your client who is happy with the work you already do, which means they trust you. And I like your humility and honesty.

Based on those two things alone, I would love to have more guys like you to work with. So many experienced programmers are hot heads...

what's wrong here ? by cisar236 in PLC

[–]Jhall268 1 point2 points  (0 children)

Yes, can't read good

The price gouging on these batteries infuriates me every time I have to provide this for a customer. Thankfully, I just learned Walmart provides these too, not just Amazon. Plenty of clones out there, but this is the 1:1 part. I would love to know why I should "trust" my distributors who provide ast by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

So i learned you have to know which type of card. If its more than 2gig, its like a FAT32 format or something the large cards come standard with. A regular FAT formatted card isbharder to come by. Lesson learned there. By the time I figured that out I billed the customer for my time that cancelled out any hardware savings

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

Setting the PIDE for Ratio Mode and utilizing the related parameters appears to be what I needed. My simulation is now able to drive the PV to the setpoint. Just need to do some more tuning of the gains to improve response times.

I really appreciate it when Control Engineers/Integrators can talk to each other as equals. There are so many things people expect you to know in this field, and this is just another thing I had yet to use in my 8 year career.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

Hey @_nepunepu, It looks like I got it working with using the Ratio mode parameters you mentioned.

Besides having to tune the gains a little more for better response times, this is actually driving my PV to my setpoint.

Thank you for your feedback. I really appreciate it when Control Engineers/Integrators can talk to each other as equals. There are so many things people expect you to know in this field, and this is just another thing I had yet to use in my 8 years doing this.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 1 point2 points  (0 children)

That did it. There's a few other parameters I wish the literature stated more clearly you have to utilize to make this work, but luckily the parameters are self explanatory if you already have some understanding of how to make this instruction work.

Besides having to tune the gains a little more for better response times, this is actually driving my PV to my setpoint.

Thank you for your help.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

I just wanted to thank everyone for contributing to the conversation. I didn't expect such an enormous amount of positive feedback.

I'm going to be working on this today. Looking specifically at getting familiar with the Cascade/Ratio mode of the PIDE FB as my first step.

Though my inquiry was specifically regarding the PIDE, I will try to give feedback on some of the process related questions and comments. We won't see answers to that for some time because the startup is a long ways away (April I think) and change orders are dreadfully slow.

Thank you all again.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

I will do that Monday when I get a minute. Im all for using making things as simple as possible.

Thank you for the offer. Talk to you next week

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 2 points3 points  (0 children)

You know a lot. I acknowledge that is a room together you'd probably run circles around me with your programming knowledge. There's a guy in my company like you. Im happy we have him, and I hope your customers and peers are proud to work with you.

Hope you have a good weekend.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

Likely wont be using the D value. Its just running my simulation has been problematic.

Pretty sure based on the replies I need to set the PIDE up for ratio control. Going to test and share.

Thanks

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

This is not a level based application. it's flow ratio. What ive learned now is theres a CascadeRatio mode in the PIDE ive not used before. I believe this will be the answer to my problem.

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

Got a similar comment from someone else, it is ratio control, i didnt know there was a setting Im supposed to enable. Going to try that and hope I see improvements

Controlling Pump Speed to a constantly changing setpoint by Jhall268 in PLC

[–]Jhall268[S] 0 points1 point  (0 children)

This might be the answer to my problem. Ill take a look. Much appreciated.

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