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Search: Posts Made By: Saffa
Forum: LIVE PLC Questions And Answers February 9th, 2019, 05:57 AM
Replies: 4
Views: 334
Posted By Saffa
I have never used any DeltaV gear, however I have...

I have never used any DeltaV gear, however I have found that going to the pub and letting things sit overnight often helps you take a new look at it from a different angle in the morning.

Good...
Forum: LIVE PLC Questions And Answers January 21st, 2019, 03:44 AM
Replies: 14
Views: 679
Posted By Saffa
I don't use this because we very rarely use...

I don't use this because we very rarely use Rockwell these days but one of our less frequent clients has an activation server on their network. As long as the laptop can see it via VPN, then it...
Forum: LIVE PLC Questions And Answers January 13th, 2019, 03:43 AM
Replies: 8
Views: 540
Posted By Saffa
That would be quite a task, given what a range of...

That would be quite a task, given what a range of features there are out there from simple drives that just follow a speed reference to ones that have hundreds of features and consequently hundreds...
Forum: LIVE PLC Questions And Answers January 12th, 2019, 04:32 AM
Replies: 11
Views: 1,006
Posted By Saffa
As much as change is a challenge especially if...

As much as change is a challenge especially if they have a large existing base of SCADAPacks, they will eventually need to migrate at some point in the future. My understanding is that the 57x range...
Forum: LIVE PLC Questions And Answers January 11th, 2019, 09:51 PM
Replies: 11
Views: 1,006
Posted By Saffa
Ah, the problem of "one-way" data... this plagues...

Ah, the problem of "one-way" data... this plagues many systems i know of. Your approach is good, but time consuming as you know.

If the registers are contiguous / in an array, could you not use a...
Forum: LIVE PLC Questions And Answers January 11th, 2019, 01:30 PM
Replies: 11
Views: 1,006
Posted By Saffa
They are still very new and I'm not sure if...

They are still very new and I'm not sure if they're available over there yet but the 575 runs a Schneider Unity Pro style of logic so I'm pretty sure you'd be able to do pretty much anything with...
Forum: LIVE PLC Questions And Answers January 11th, 2019, 01:26 PM
Replies: 20
Views: 1,543
Posted By Saffa
Everything in the enclosure is marked first,...

Everything in the enclosure is marked first, drilled, tapped then cleaned out. But we only build very small panels ourselves generally to a standard template. I can see the time saving using self...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 01:11 PM
Replies: 15
Views: 999
Posted By Saffa
I personally try and avoid venting my rectifier...

I personally try and avoid venting my rectifier while inside a small office space, I find that helps save face.
Forum: LIVE PLC Questions And Answers January 10th, 2019, 01:07 PM
Replies: 20
Views: 1,543
Posted By Saffa
Here in upside down land we do! 5 or 6mm machine...

Here in upside down land we do! 5 or 6mm machine screws for most things.

Drill and tap, tap is a battery drill type. I have one drill with the drill bit fitted and another with the tap bit so no...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 05:38 AM
Replies: 16
Views: 779
Posted By Saffa
Can you add a load of say, 5A and see what...

Can you add a load of say, 5A and see what happens? The currents you're measuring are tiny and i suspect thats the issue.

A 24V anti condensation heater or two is a good load if you can't add...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 05:25 AM
Replies: 15
Views: 1,218
Posted By Saffa
Nope, Palo Alto for the VPN appliance and Moxa...

Nope, Palo Alto for the VPN appliance and Moxa EDR as a transparent firewall between the VPN and a control system DMZ.

Only traffic allowed through is that required for remote desktop connection...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 03:30 AM
Replies: 15
Views: 1,218
Posted By Saffa
I trust a VPN and firewall that I've set up...

I trust a VPN and firewall that I've set up significantly more than some black box system that a big corporate is selling. And if you can access it remotely then it's connected to the internet. No...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 02:40 AM
Replies: 16
Views: 779
Posted By Saffa
Gary, the Diode unit takes care of the fact that...

Gary, the Diode unit takes care of the fact that one supply might have slightly higher output voltage. That unit will provide the lions share of the current. But that's ok, this is a redundancy...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 01:05 AM
Replies: 12
Views: 680
Posted By Saffa
That is gold.

That is gold.
Forum: LIVE PLC Questions And Answers January 9th, 2019, 01:14 PM
Replies: 12
Views: 680
Posted By Saffa
Are you referring to the IT department? There's a...

Are you referring to the IT department? There's a few I've come across that I'd love to lock out, tag out and throw away the key...
Forum: LIVE PLC Questions And Answers January 9th, 2019, 01:11 PM
Replies: 16
Views: 779
Posted By Saffa
I have come across some switchmode supplies which...

I have come across some switchmode supplies which hiss, like Sbaum mentioned. This is generally when there's no load and the pulse width is low. Its just a harmless side effect of a switching...
Forum: LIVE PLC Questions And Answers January 4th, 2019, 06:26 PM
Replies: 58
Views: 4,603
Posted By Saffa
Unfortunately it requires the mechanical engineer...

Unfortunately it requires the mechanical engineer to have some idea of failure modes, and able to give the programmer enough information to model this accurately.

Sometimes the additional...
Forum: LIVE PLC Questions And Answers January 3rd, 2019, 05:05 AM
Replies: 12
Views: 677
Posted By Saffa
All good, I should maybe have worded things...

All good, I should maybe have worded things better. One of the negative consequences of typing on a mobile is a tendancy to be brief, which isn't always beneficial on a forum.

By now I'm sure the...
Forum: LIVE PLC Questions And Answers January 3rd, 2019, 04:57 AM
Replies: 58
Views: 4,603
Posted By Saffa
The Radio Guys problems are often caused by the...

The Radio Guys problems are often caused by the PLC guy trying to poll 100 remote sites at 5 second intervals over a 2400 baud serial radio, then wondering why it doesn't work.

That's why I like...
Forum: LIVE PLC Questions And Answers January 3rd, 2019, 01:36 AM
Replies: 12
Views: 677
Posted By Saffa
So you believe that 5 Volts DC in the UK could be...

So you believe that 5 Volts DC in the UK could be different to 5 Volts DC here in NZ? Voltage and potential difference are different names for exactly the same thing: joules per coulomb charge.
...
Forum: LIVE PLC Questions And Answers January 3rd, 2019, 12:54 AM
Replies: 3
Views: 280
Posted By Saffa
first important question: Is it classic...

first important question:

Is it classic Intouch, or System Platform?

They can be hard to tell apart as system platform uses Intouch as the front end HMI software still.

Best way is to open...
Forum: LIVE PLC Questions And Answers January 1st, 2019, 04:27 AM
Replies: 12
Views: 677
Posted By Saffa
Voltage is voltage. If your analog output card is...

Voltage is voltage. If your analog output card is 0-10V and the speed reference input to the drive is 0-10V then you can connect them. Just leave the 10V source terminal on the drive disconnected.
...
Forum: LIVE PLC Questions And Answers December 29th, 2018, 02:01 PM
Replies: 10
Views: 965
Posted By Saffa
There are certainly instances where hot standby...

There are certainly instances where hot standby is a requirement, and simply carrying a spare is not sufficient.

We operate a major wastewater pumping station where should the controls fail, the...
Forum: LIVE PLC Questions And Answers December 27th, 2018, 01:00 AM
Replies: 10
Views: 965
Posted By Saffa
There is no over arching standard that says you...

There is no over arching standard that says you must have redundancy. Maybe there's an industry specific standard that mandates it but in my industry (water and waste) we only specify redundancy...
Forum: LIVE PLC Questions And Answers December 24th, 2018, 11:04 PM
Replies: 24
Views: 1,524
Posted By Saffa
Do you have a second USB to serial converter?...

Do you have a second USB to serial converter? When troubleshooting something like this i like to set up RealTerm or PuTTy with known port settings and just try send single characters from one port to...
Showing results 1 to 25 of 500

 
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