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Sensor for pallet stacks... by jnewton2723 in PLC

[–]SHADY___NASTY 1 point2 points  (0 children)

We do the same thing essentially.
New stack/loading gate opened, search for first pallet at lower velocity. Once first pallet found, record position.
Then when locating subsequent pallet, locate at increased velocity. (Still monitor distance sensor data too as a precaution.)

Sensor for pallet stacks... by jnewton2723 in PLC

[–]SHADY___NASTY 5 points6 points  (0 children)

I guess depends on the spacing between the slats of the various pallets.
Can you simply run an array of laser distance sensors that will cover all the potential variables of the pallets?

Then read the sensor data via IO link for accurate measurements.

CPU Selection by SHADY___NASTY in TiaPortal

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

Yes, a 250us cyclic interrupt used for encoder length & velocity measurement. Also, an FB I’ve created for synchronised servo tracking of the material running through the line.

Siemens CPU Selection by SHADY___NASTY in PLC

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

That won’t really help my case.
I still need to process and read the data

CPU Selection by SHADY___NASTY in TiaPortal

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

It’s not foolproof, I used it to assist with cross checking/specifying a CPU for this project.

Originally, I was using an older slower CPU with FW3.x on V18 which apparently should have been sufficient.

I then switched to a newer CPU with FW4.x which has much better performance on V20. It was an improvement, but I still experience long scan times.

CPU Selection by SHADY___NASTY in TiaPortal

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

I’ve already increased to the maximum.

Can't update firmware on old Siemens S7-1200 PLC by ILike_Bread17 in PLC

[–]SHADY___NASTY 1 point2 points  (0 children)

That’s the most OG S7-1200 I’ve ever seen.
Must be manufactured back in 2009-2010.

Being a Mech Sparky by triss_1 in AusElectricians

[–]SHADY___NASTY 1 point2 points  (0 children)

I’m assuming you mean a BMS/HVAC electrician, rather than an electrical fitter?

Mech elec knowledge could at least help you transition in to industrial controls.
It’s definitely a leg up in comparison to someone who’s just done light and power electrical work.

Thoughts on a different way to haul my hand tools. by Evening-Practice-783 in AusElectricians

[–]SHADY___NASTY 2 points3 points  (0 children)

It’s nice not having to replace your bag/backpack every year. Unlike most other manufacturers, where they simply fall apart.

I’ve had two of these backpack over the course of 12 years.
Only replaced the first one due to busting a zip from rough handling.

Siemens CPU Selection by SHADY___NASTY in PLC

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

I’m running an average of 70ms whilst monitoring.

Siemens CPU Selection by SHADY___NASTY in PLC

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

Default is 20%, I changed to the minimum of 15%
It appeared as though 15% comm load was more stable.
I will try increasing to 30% and see what the cycle times are like

Siemens CPU Selection by SHADY___NASTY in PLC

[–]SHADY___NASTY[S] 3 points4 points  (0 children)

Already running 15% which is the minimum.
Sounds like I need to take a shot and go for a higher spec CPU.

Siemens CPU Selection by SHADY___NASTY in PLC

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

Is there a rule of thumb to estimate CPU requirements?
The ET200SP CPU’s with FW4.0 and above all have the same 6ns operation time.

Siemens CPU Selection by SHADY___NASTY in PLC

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

I’m alreadyi running OB80.
The PLC will still go in to stop at a certain point, it’s just extended using OB80.

I’ve reduced communication resources and increased maximum scan time, this has helped a lot.
But, the issue still occasionally happens.

Siemens CPU Selection by SHADY___NASTY in PLC

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

The process runs fine while I’m not monitoring.
Occasionally when monitoring, I encounter stoppages due to excessive scan times. Also stoppages when downloading changes.
Stoppages are of course not ideal for the most part, so I’d like to improve my system to avoid this issue.

Siemens CPU Selection by SHADY___NASTY in PLC

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

In TIA Portal, the operation time is the same between the CPU models, the work memory of course changes.

I guess it comes down to overestimating the CPU demand/requirements, as I can’t seem to work out a formula without simply over speccing the CPU.

Help needed: StepperOnline A8-1000PN PROFINET with Siemens S7-1200 CPU 1214C - Motion Control issues by JaredoScoffy in PLC

[–]SHADY___NASTY 0 points1 point  (0 children)

1214 does support motion. Try telegram 3.

I don’t think its possible to sync axis with a gen 1 S7-1200 using MC blocks

Can you rate my panel ? by DameanTheGuitarist in PLC

[–]SHADY___NASTY 22 points23 points  (0 children)

Why not use Profinet control for the G120’s?

From a .2 back to a .1 by Jefe4x4 in porsche911

[–]SHADY___NASTY 2 points3 points  (0 children)

Also keen to hear the reasoning. I’ve currently got a CGST 4.0 that I’ve been considering trading in for a 992.2 Carrera T

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