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Search: Posts Made By: Saffa
Forum: LIVE PLC Questions And Answers Yesterday, 06:00 PM
Replies: 14
Views: 326
Posted By Saffa
Maybe in AB land, but in many other systems the...

Maybe in AB land, but in many other systems the equivalent of an AOI can be edited online. The power of that is, should the "perfect" programmer find a bug in his code, he can fix it easily without...
Forum: LIVE PLC Questions And Answers Yesterday, 04:29 AM
Replies: 9
Views: 259
Posted By Saffa
Like ASF I can't help with specifics, but I do...

Like ASF I can't help with specifics, but I do this all the time with Schneider ATV650s. I use DI6 on the drive to swap from command channel 1 to command channel 2. One is ethernet, two is terminals....
Forum: LIVE PLC Questions And Answers February 25th, 2021, 03:49 AM
Replies: 26
Views: 1,097
Posted By Saffa
That nightmare sounds only slightly better than...

That nightmare sounds only slightly better than being the defendant in said nightmare.

One of my senior electricians told me about a large urban pump station in a "big" city here in the 80s that...
Forum: LIVE PLC Questions And Answers February 24th, 2021, 12:50 PM
Replies: 26
Views: 1,097
Posted By Saffa
Pure water has a pretty low conductivity. It's...

Pure water has a pretty low conductivity. It's the dissolved ions that determine its conductivity. It's also this soluble matter that causes problems later once the water has evaporated.

So...
Forum: LIVE PLC Questions And Answers February 17th, 2021, 11:40 PM
Replies: 12
Views: 503
Posted By Saffa
How about just using what the IT guys use (SNMP),...

How about just using what the IT guys use (SNMP), but getting it served up as OPCUA tags?

I had a small setup using this on one site about 6 years ago.
...
Forum: LIVE PLC Questions And Answers February 17th, 2021, 04:57 AM
Replies: 14
Views: 658
Posted By Saffa
AlfredoQuintero, I salute you. A true engineer,...

AlfredoQuintero, I salute you. A true engineer, with two transducers set up on his dining room table and a big ol heap of wiring, eager to help a comrade in distress.

(I have a full duplex Trio...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 02:42 PM
Replies: 37
Views: 1,787
Posted By Saffa
This is always appreciated by the installers....

This is always appreciated by the installers. Seen way too many panels where there's one fused +24V terminal for the positive feed of the field I/O. Cool... expect me to land 16 wires into that do...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 12:29 PM
Replies: 37
Views: 1,787
Posted By Saffa
Minimum of 25% free space for future expansion,...

Minimum of 25% free space for future expansion, if this is for anything other than a machine specific control panel.

On most big plants now that will likely be there for 30+ years I ask for /...
Forum: LIVE PLC Questions And Answers February 11th, 2021, 05:49 PM
Replies: 18
Views: 1,359
Posted By Saffa
You can drink beer at work anywhere in the world....

You can drink beer at work anywhere in the world. It's getting caught doing so that's the problem
Forum: LIVE PLC Questions And Answers February 11th, 2021, 04:07 AM
Replies: 8
Views: 330
Posted By Saffa
Cheap PLC with 8 inputs and an analog output? One...

Cheap PLC with 8 inputs and an analog output? One line of code copying the digital input image to an INT, then scaling it to the analog output range.

Bit of a bludge though but i haven't come...
Forum: LIVE PLC Questions And Answers February 11th, 2021, 02:07 AM
Replies: 8
Views: 436
Posted By Saffa
As ASF said you'd be multiplying the 5 by 60, not...

As ASF said you'd be multiplying the 5 by 60, not using DIV.

I haven't used an old modicon for half a decade but I'm sure there was an Integer MUL instruction.

But as ASF also said, just scale...
Forum: LIVE PLC Questions And Answers February 9th, 2021, 04:11 AM
Replies: 17
Views: 1,495
Posted By Saffa
What I see often is that an organizations IT...

What I see often is that an organizations IT department don't facilitate any remote access options, so the resourceful operators find a way around. You can't manage what you don't know about, and for...
Forum: LIVE PLC Questions And Answers February 8th, 2021, 11:52 PM
Replies: 17
Views: 1,495
Posted By Saffa
Its scary how many systems i come across in the...

Its scary how many systems i come across in the water industry that are poorly protected. VNC with no password, no VPN etc.

The ability to change a SP to such an abnormal value though is also a...
Forum: LIVE PLC Questions And Answers February 7th, 2021, 11:21 PM
Replies: 14
Views: 706
Posted By Saffa
If it's a new system I'd select 24V DC as your...

If it's a new system I'd select 24V DC as your control voltage. Much more common to find modern PLCs with 24V digital inputs and outputs.

A small DC switch mode power supply is all you need for...
Forum: LIVE PLC Questions And Answers February 6th, 2021, 06:03 AM
Replies: 22
Views: 1,047
Posted By Saffa
If I ever detect an unusual odour at work, I...

If I ever detect an unusual odour at work, I always remember the saying "He who denied it supplied it", and carry on without further comment.
Forum: LIVE PLC Questions And Answers February 5th, 2021, 02:56 PM
Replies: 12
Views: 540
Posted By Saffa
It can be a bit fiddly to set up right,...

It can be a bit fiddly to set up right, especially if the torque available through the gearbox is high, but the motor runs lightly loaded. I would set it close to the running torque then increase up...
Forum: LIVE PLC Questions And Answers February 5th, 2021, 02:11 PM
Replies: 20
Views: 1,120
Posted By Saffa
We've used the Magelis STU range in most of our...

We've used the Magelis STU range in most of our waste water pumping stations for years. Mounted through a 22mm hole same as a pilot light, decent gasket etc keeps the panel sealed.

Ours do spend...
Forum: LIVE PLC Questions And Answers February 5th, 2021, 02:01 PM
Replies: 12
Views: 540
Posted By Saffa
Most of the clarifier drives I've seen have a...

Most of the clarifier drives I've seen have a prox like AkaHammer suggested, which is used to detect the movement of the clarifier arm (not on the gearbox shaft, but on the end of the arm at one...
Forum: LIVE PLC Questions And Answers February 5th, 2021, 01:41 PM
Replies: 15
Views: 893
Posted By Saffa
Toine, I for one believe we are all entitled...

Toine,

I for one believe we are all entitled to one chance at redemption, even after terrible sins (such as working in IT).

Don't screw it up though ok?
Forum: LIVE PLC Questions And Answers February 4th, 2021, 01:04 PM
Replies: 27
Views: 1,257
Posted By Saffa
I'm glad Lare has jumped in here, there were a...

I'm glad Lare has jumped in here, there were a bunch of things I'd forgotten about, like that activity bit interlock before sending again.

Unless your IP address for the ADDM is a public internet...
Forum: LIVE PLC Questions And Answers February 3rd, 2021, 05:43 PM
Replies: 27
Views: 1,257
Posted By Saffa
Hi Frank, Whoops, didn't see that left hand...

Hi Frank,

Whoops, didn't see that left hand side (was reading on my small phone screen last night!).

If the second NOE card is the one on the same subnet as the red Lion then yes, your ADDM...
Forum: LIVE PLC Questions And Answers February 3rd, 2021, 05:17 PM
Replies: 27
Views: 1,257
Posted By Saffa
Hi Frank, Whoops, didn't see that left hand...

Hi Frank,

Whoops, didn't see that left hand side (was reading on my small phone screen last night!).

If the second NOE card is the one on the same subnet as the red Lion then yes, your ADDM...
Forum: LIVE PLC Questions And Answers February 3rd, 2021, 05:48 AM
Replies: 27
Views: 1,257
Posted By Saffa
Hey Frank, Can you show me a screenshot of...

Hey Frank,

Can you show me a screenshot of how your PLC rack is laid out, showing processor, NOE etc? Your ADDM addressing suggests a processor, another card and then the NOE if it's 0.2.0

But...
Forum: LIVE PLC Questions And Answers February 3rd, 2021, 03:19 AM
Replies: 27
Views: 1,257
Posted By Saffa
Hi Frank, I assume you set start_read_var to...

Hi Frank,

I assume you set start_read_var to 1 again, after making the changes?

The first word of the CAT_1_GEST array has the same value as your last post, this should change to a different...
Forum: LIVE PLC Questions And Answers February 3rd, 2021, 02:15 AM
Replies: 27
Views: 1,257
Posted By Saffa
Hi Frank, The text on the OBJ pin of the...

Hi Frank,

The text on the OBJ pin of the READ_VAR should be '%IW' for 3x registers (IEC notation). '%MW' is for 4x Registers.

CAT_1_GEST should be connected to both the GEST in and out pins of...
Showing results 1 to 25 of 500

 
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