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Showing results 1 to 25 of 452
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Search: Posts Made By: Pete.S.
Forum: LIVE PLC Questions And Answers April 16th, 2018, 12:22 PM
Replies: 17
Views: 610
Posted By Pete.S.
Fiber for sure, it's used everyday for industrial...

Fiber for sure, it's used everyday for industrial use. But don't run multimode for new installations. Just use singlemode for everything. It better and not more expensive these days.

Always...
Forum: LIVE PLC Questions And Answers April 16th, 2018, 12:10 PM
Replies: 4
Views: 148
Posted By Pete.S.
You already answered your own question - just...

You already answered your own question - just measure the temperature.
Forum: LIVE PLC Questions And Answers April 15th, 2018, 06:31 PM
Replies: 6
Views: 242
Posted By Pete.S.
Use Windows 10 Enterprise. Or remove the...

Use Windows 10 Enterprise.

Or remove the gateway in the IP config.

Or block the computers in the firewall from accessing internet.

Or just install Windows 7 or one of the windows server...
Forum: LIVE PLC Questions And Answers April 10th, 2018, 02:05 AM
Replies: 27
Views: 1,109
Posted By Pete.S.
I'd also like to mention that there are a few...

I'd also like to mention that there are a few tools needed to troubleshoot RS485 buses.

1. RS485 transceiver for PC connection
2. Software that can record communication
3. DSO or analog scope
...
Forum: LIVE PLC Questions And Answers April 9th, 2018, 12:26 PM
Replies: 11
Views: 416
Posted By Pete.S.
Put the thing inside an enclosure. Now tools are...

Put the thing inside an enclosure. Now tools are required.
Forum: LIVE PLC Questions And Answers April 9th, 2018, 12:23 PM
Replies: 11
Views: 416
Posted By Pete.S.
Yes, it probably would. Pluggable...

Yes, it probably would.

Pluggable connectors are safe, but not vandalism safe.
Anyone with a screwdriver could swap things around in your electrical cabinet. Or swap pneumatic hoses around on...
Forum: LIVE PLC Questions And Answers April 9th, 2018, 12:16 PM
Replies: 11
Views: 416
Posted By Pete.S.
If it's the highest safety rating the safety...

If it's the highest safety rating the safety PLC/relay will send diagnostic pulses over the contacts so something wired incorrectly would be detected by the safety circuit.
Forum: LIVE PLC Questions And Answers April 8th, 2018, 09:19 PM
Replies: 7
Views: 674
Posted By Pete.S.
You need to have a multidisciplinary technical...

You need to have a multidisciplinary technical approach to solve problems like this. Can't just look at the control of the servos.

In my experience it's possible that it's the measuring wheel...
Forum: LIVE PLC Questions And Answers April 7th, 2018, 04:20 AM
Replies: 27
Views: 1,109
Posted By Pete.S.
Oh, this is a classic problem. With 98.4%...

Oh, this is a classic problem.

With 98.4% certainty your problem is that you haven't installed any bias resistors.

In a point to point configuration 4 wire configuration the transmitter on both...
Forum: LIVE PLC Questions And Answers April 4th, 2018, 04:22 PM
Replies: 12
Views: 736
Posted By Pete.S.
Since STO circuit on the powerflex 525 is only...

Since STO circuit on the powerflex 525 is only PLd, maybe you should use another drive instead.

I know ABB have PLe on their STO circuits and I'm sure others as well. That's as good as it can get....
Forum: LIVE PLC Questions And Answers March 31st, 2018, 12:46 PM
Replies: 6
Views: 367
Posted By Pete.S.
Why are PID loops with feed forward not more common?

Hi guys!

It seems to me that PID loops with feed forward are underutilized. Maybe it's just me but I think almost every loop would work better with some kind of feed forward component but I seldom...
Forum: LIVE PLC Questions And Answers March 31st, 2018, 12:32 PM
Replies: 2
Views: 249
Posted By Pete.S.
Normally you would set pvsource to manual then...

Normally you would set pvsource to manual then enter the pv you want the input to have. That's done on the analog input or on the PID controller itself. SP (setpoint) value is just to set to whatever...
Forum: LIVE PLC Questions And Answers March 23rd, 2018, 05:22 PM
Replies: 9
Views: 513
Posted By Pete.S.
Licence key says Simatic HMI - WinCC...

Licence key says Simatic HMI - WinCC Comfort/Advanced - 14.0

So I guess it's WinCC Advanced.
Forum: LIVE PLC Questions And Answers March 23rd, 2018, 05:14 PM
Replies: 42
Views: 2,162
Posted By Pete.S.
You guys have too much technical knowledge,...

You guys have too much technical knowledge, that's the problem.

To me a smart phone is nothing but a small computer with some RF components and a touch screen.

Facebook is just a some...
Forum: LIVE PLC Questions And Answers March 22nd, 2018, 05:45 AM
Replies: 18
Views: 1,068
Posted By Pete.S.
Examples aren't going to get you a job or a...

Examples aren't going to get you a job or a project.

If all you have are some courses and some examples then you are not qualified.

You have to do something in the real world that can be seen...
Forum: LIVE PLC Questions And Answers March 22nd, 2018, 03:31 AM
Replies: 9
Views: 513
Posted By Pete.S.
Thanks guys! Everything worked when I did as...

Thanks guys!

Everything worked when I did as you said.

In my case:
In Windows Control Panel Set PG/PC interface S7ONLINE to TCPIP.1
Have focus on the HMI in the project tree when you press...
Forum: LIVE PLC Questions And Answers March 19th, 2018, 03:31 PM
Replies: 9
Views: 513
Posted By Pete.S.
HMI on PC while developing in TIA portal

Hi guys,

I've started using TIA portal recently having used step7 for a long time.

In the old version using wincc I could start the runtime on my computer and get a live version of the HMI on...
Forum: LIVE PLC Questions And Answers March 19th, 2018, 03:15 PM
Replies: 7
Views: 440
Posted By Pete.S.
On number two you start by not doing it. ...

On number two you start by not doing it.
Animated HMIs are harder to use and in general you want to avoid animating things.

If you want to show that something is rotating, make a circular arrow...
Forum: LIVE PLC Questions And Answers March 19th, 2018, 03:08 PM
Replies: 9
Views: 293
Posted By Pete.S.
Don't know what you are trying to do but a loop...

Don't know what you are trying to do but a loop is better than 78 lines of code just about...every time :)
Forum: LIVE PLC Questions And Answers March 18th, 2018, 07:19 PM
Replies: 6
Views: 293
Posted By Pete.S.
Haven't seen modbus udp anywhere. The...

Haven't seen modbus udp anywhere.

The solution to ethernet short segment distance (330ft) is single mode fiber.
To me the use for modbus over rs485 or rs422 would be in legacy applications only.
Forum: LIVE PLC Questions And Answers March 18th, 2018, 07:09 PM
Replies: 7
Views: 342
Posted By Pete.S.
r1_rls as_rbr r1_rls +---]...

r1_rls as_rbr r1_rls
+---] [---------]/[----+---( )--
| |
| r1_rls as_lbr |
+---]/[---------] [----+
Nice work Steve.
It shows how verbose structured text...
Forum: LIVE PLC Questions And Answers March 18th, 2018, 06:52 PM
Replies: 7
Views: 342
Posted By Pete.S.
This is the code: if r1_rls then if...

This is the code:

if r1_rls then
if as_rbr then
r1_rls := 0;
else
r1_rls := 1;
endif
else
if as_lbr then
Forum: LIVE PLC Questions And Answers March 18th, 2018, 03:48 PM
Replies: 14
Views: 667
Posted By Pete.S.
Safety - as modbus is not a safety protocol so...

Safety - as modbus is not a safety protocol so you can't transfer STO signals for instance.

Portability - you will be dependent on a specific model or brand VFD in your application.
...
Forum: LIVE PLC Questions And Answers March 18th, 2018, 03:28 PM
Replies: 18
Views: 730
Posted By Pete.S.
The functionality you are looking for is not...

The functionality you are looking for is not really the job of the HMI. You're looking for a historian.

The historian would log and save all values of interest and the engineers could use that to...
Forum: LIVE PLC Questions And Answers March 16th, 2018, 05:37 PM
Replies: 9
Views: 485
Posted By Pete.S.
It's a bit confusing but it's actually what the...

It's a bit confusing but it's actually what the OP is looking for.

What you have is:
OPC server (PLC) -> Simatic Net OPC server (PC) -> OPC client (PC)

If you select "local" the OPC server...
Showing results 1 to 25 of 452

 
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