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Search: Posts Made By: JesperMP
Forum: LIVE PLC Questions And Answers Today, 06:36 AM
Replies: 4
Views: 155
Posted By JesperMP
Almost certainly because the PLC as master cannot...

Almost certainly because the PLC as master cannot see the configured slaves.
To be certain, connect with STEP7 and check the hardware diagnostics. It will probably show that there are slaves that...
Forum: LIVE PLC Questions And Answers Yesterday, 03:13 PM
Replies: 4
Views: 155
Posted By JesperMP
Putting just connectors and enabling the...

Putting just connectors and enabling the terminators wont do neither good nor bad.


In order to figure out why there are errors on both hardware and software PLCs, you need to use STEP7 and check...
Forum: LIVE PLC Questions And Answers August 15th, 2018, 09:20 AM
Replies: 12
Views: 177
Posted By JesperMP
A PN/PN Coupler is not suited to connect a...

A PN/PN Coupler is not suited to connect a supervisory LAN and a machine LAN. It is suited to connect dissimilar machine LANs.

In you case, you need a router between the supervisory LAN and the...
Forum: LIVE PLC Questions And Answers August 15th, 2018, 02:44 AM
Replies: 12
Views: 177
Posted By JesperMP
edited, after I reread the 1st post. You...

edited, after I reread the 1st post.
You mention that "most" suppliers will use a Siemens S7 PLC. Well, chances are that some will be S7-1500. Your ET200S/IM151-8 is essentially an S7-300 of the...
Forum: LIVE PLC Questions And Answers August 14th, 2018, 05:48 AM
Replies: 22
Views: 444
Posted By JesperMP
In case the real culprit isnt found, then you...

In case the real culprit isnt found, then you could consider to drop the speed from 1.5M to 187.5k. At 187.5k, Profibus is much more forgiving. Of course the TTR increases accordingly, but in many...
Forum: LIVE PLC Questions And Answers August 14th, 2018, 05:17 AM
Replies: 22
Views: 444
Posted By JesperMP
It was the entire plant which didnt have a proper...

It was the entire plant which didnt have a proper earth.
Forum: LIVE PLC Questions And Answers August 14th, 2018, 02:57 AM
Replies: 22
Views: 444
Posted By JesperMP
Without profitrace, one thing to check is if...

Without profitrace, one thing to check is if there is a equipotential connection between panels, and if it is done correctly.
Forum: LIVE PLC Questions And Answers August 14th, 2018, 02:56 AM
Replies: 22
Views: 444
Posted By JesperMP
Renting a profitrace is also possible. We rented...

Renting a profitrace is also possible. We rented one when we had a problem which we just couldnt knack. With the profitrace it was quickly established that the common ground was floating, something...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 03:28 PM
Replies: 8
Views: 143
Posted By JesperMP
Your jpgs are only 157 bytes. They seem to be...

Your jpgs are only 157 bytes. They seem to be corrupted.
Forum: LIVE PLC Questions And Answers August 13th, 2018, 03:26 PM
Replies: 22
Views: 444
Posted By JesperMP
I may have confused you by assuming that there...

I may have confused you by assuming that there are connectors on the repeater.
If the repeater is the kind without connectors, but have terminals built-in, then there will be a switch on each side...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 12:54 PM
Replies: 22
Views: 444
Posted By JesperMP
115 what ? 115 kbps ? That is not a standard...

115 what ? 115 kbps ? That is not a standard profibus speed as far as I remember.
Maybe you mean 1.5 Mbps ?


The terminators should like this:
Repeater-out (IN)(ON) ---- PAS 153 slave...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 12:46 PM
Replies: 8
Views: 143
Posted By JesperMP
If the above does not point to the error: ...

If the above does not point to the error:

TIA can sometimes act up and cause WinCC RT to behave strangely.
You should do Rebuild All (software) every now and then.
Forum: LIVE PLC Questions And Answers August 13th, 2018, 03:50 AM
Replies: 18
Views: 630
Posted By JesperMP
Ditto to what has already been said. You need a...

Ditto to what has already been said.
You need a course in maschine safety, or you must hire a safety consultant.
This is not trivial matter.
If there is an accident with your machine and you...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 03:08 AM
Replies: 21
Views: 1,035
Posted By JesperMP
It is called "wiring-correct schematics" or...

It is called "wiring-correct schematics" or something to that effect - I dont have the english name for it.
It does take some effort by the person doing the schematics. He has to consider the best...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 02:49 AM
Replies: 5
Views: 191
Posted By JesperMP
You mean that if you try to use a plain...

You mean that if you try to use a plain USB-to-serial adapter with Siemens serial-to-TTY adapter then it wont work.
Forum: LIVE PLC Questions And Answers August 13th, 2018, 02:46 AM
Replies: 5
Views: 191
Posted By JesperMP
If you have an important machine or process that...

If you have an important machine or process that is running with an S5 CPU, and you cannot migrate to a newer PLC in the short term, then I would follow genius' advice and get S5 for Windows and the...
Forum: LIVE PLC Questions And Answers August 13th, 2018, 02:39 AM
Replies: 6
Views: 199
Posted By JesperMP
I would follow mk42's advice. When you create a...

I would follow mk42's advice.
When you create a Data Type you will then have meaningful names in the program, such as I_VfdStatus.Fault instead of I_VfdStatus.%X2
Easier to read the program. Less...
Forum: LIVE PLC Questions And Answers August 10th, 2018, 02:59 AM
Replies: 21
Views: 1,035
Posted By JesperMP
"Entry and starting new wire into a wire...

"Entry and starting new wire into a wire terminal".
I read that as how do you show how the wiring is really connected for when you wire the same potential to several compoenents. In other words...
Forum: LIVE PLC Questions And Answers August 9th, 2018, 04:37 AM
Replies: 27
Views: 1,067
Posted By JesperMP
Oh yes. Had a complete plant shutdown because an...

Oh yes. Had a complete plant shutdown because an external fitter couldnt find an outlet, until he walked into the control room and the cabinet door was open.

Today, we do the same as you. In...
Forum: LIVE PLC Questions And Answers August 9th, 2018, 03:45 AM
Replies: 27
Views: 1,067
Posted By JesperMP
We have used Siemens 3-phase-to-24VDC PSUs for...

We have used Siemens 3-phase-to-24VDC PSUs for almost 20 years now. Barely any problems.
Even when we have a control transformer to get single phase AC, we still use the 3-phase PSU.
Back in the...
Forum: LIVE PLC Questions And Answers August 9th, 2018, 03:39 AM
Replies: 103
Views: 5,236
Posted By JesperMP
Unfortunately, I dont remember the name. I only...

Unfortunately, I dont remember the name. I only remember how they looked like.
I have tried to see if I could find something on the internet, but to no avail.
Forum: LIVE PLC Questions And Answers August 8th, 2018, 02:53 AM
Replies: 103
Views: 5,236
Posted By JesperMP
Were these MTE (I think) blocks that stacked on...

Were these MTE (I think) blocks that stacked on top of each other with screw clamp connectors sprouting all around, about the size of a cigarette packet. They stacked on breakable metal rods, if one...
Forum: LIVE PLC Questions And Answers August 7th, 2018, 07:52 AM
Replies: 31
Views: 1,408
Posted By JesperMP
I got this Magma MA2635 backpack:...

I got this Magma MA2635 backpack:...
Forum: LIVE PLC Questions And Answers August 6th, 2018, 07:42 AM
Replies: 103
Views: 5,236
Posted By JesperMP
Way back, I have experience with some pretty...

Way back, I have experience with some pretty rarely used PLCs.
Like Festo FPC, S5-110, AEG (with AEG software, not Modicon software), SattCon 100, in addition to the more typical S5-100, -115, -135,...
Forum: LIVE PLC Questions And Answers August 6th, 2018, 06:52 AM
Replies: 7
Views: 308
Posted By JesperMP
This thread on Siemens Support forum tells you...

This thread on Siemens Support forum tells you (in german):
FB15 in a Sinumerik PLC is similar to the SFCs and SFCs. It is fixed in the CPU and cannot be and is not supposed to be uploaded.
FB15...
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