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Search: Posts Made By: jraef
Forum: LIVE PLC Questions And Answers February 13th, 2020, 06:34 PM
Replies: 22
Views: 952
Posted By jraef
Just for posterity, since this was written years...

Just for posterity, since this was written years ago and is dropping off of the radar, I suggest that if the subject of how and when to use various starting methods is of interest, download and save...
Forum: LIVE PLC Questions And Answers February 13th, 2020, 11:52 AM
Replies: 22
Views: 952
Posted By jraef
Fix? Thatís the entire PURPOSE of a soft...

Fix? Thatís the entire PURPOSE of a soft starter...
Forum: LIVE PLC Questions And Answers February 12th, 2020, 07:51 PM
Replies: 22
Views: 952
Posted By jraef
Several soft starter mfrs have, or used to have,...

Several soft starter mfrs have, or used to have, 5 pole reversing soft starters. But it has fallen out of favor because it will end up costing more than just adding a reversing contactor, and they...
Forum: LIVE PLC Questions And Answers February 11th, 2020, 07:43 PM
Replies: 15
Views: 4,945
Posted By jraef
What you are describing is called "Torque...

What you are describing is called "Torque Proving" and the PF525 is not capable of that, it does no offer true Torque Control mode. You need a PF7xx class drive for that.
Forum: LIVE PLC Questions And Answers February 10th, 2020, 02:17 PM
Replies: 13
Views: 559
Posted By jraef
As further support for your plan, I have had...

As further support for your plan, I have had issues with using the Relay Outputs of VFDs in Safety Monitor circuits. The energy used in Safety Relays is typically very low and over time, can be too...
Forum: LIVE PLC Questions And Answers February 6th, 2020, 03:03 AM
Replies: 2
Views: 171
Posted By jraef
The maximum surface temperature it can heat...

The maximum surface temperature it can heat something up to is 300F. But at 10W, that surface would have to be VERY VERY tiny (or in an ambient that is already 290F). It’s not a simple thing to...
Forum: LIVE PLC Questions And Answers February 5th, 2020, 07:39 PM
Replies: 23
Views: 4,272
Posted By jraef
Learn to recognize it as "the smell of money"... ...

Learn to recognize it as "the smell of money"...


But never get complacent about the environment. A friend who worked in the industry for 40 years got a small nick on his knee coming up a wet...
Forum: LIVE PLC Questions And Answers February 5th, 2020, 01:07 PM
Replies: 27
Views: 1,264
Posted By jraef
There is the salient point right there. The...

There is the salient point right there. The requirements for "removing energy" for performing normal work related tasks such as changing a grinding wheel, require a "Lock-Out / Tag-Out" procedure....
Forum: LIVE PLC Questions And Answers January 31st, 2020, 05:30 PM
Replies: 4
Views: 337
Posted By jraef
Yes and no. The utility may not know or care. I...

Yes and no. The utility may not know or care. I have found may of them unhelpful. Worth a try, but if you get nowhere, just take a look at your service entrance; if there is a neutral landing lug...
Forum: LIVE PLC Questions And Answers January 31st, 2020, 10:24 AM
Replies: 4
Views: 337
Posted By jraef
The issue of delta or resistance grounded Wye has...

The issue of delta or resistance grounded Wye has ONLY to do with the line side SOURCE. It has nothing whatsoever to do with how the motor is connected. Nothing about how the motor is connected has...
Forum: LIVE PLC Questions And Answers January 28th, 2020, 04:26 PM
Replies: 17
Views: 707
Posted By jraef
But still, to feed the primary of a control...

But still, to feed the primary of a control transformer or 480V power supply you need lugs that are rated for two wires and in this case, two dissimilar sized wires. so the distribution block is...
Forum: LIVE PLC Questions And Answers January 27th, 2020, 05:04 PM
Replies: 6
Views: 373
Posted By jraef
It might be password protected. Par. 296 shows...

It might be password protected. Par. 296 shows what level of parameters are locked, 297 is where you put in the unlock code. If you don't know the code, you might be out of luck.

The default is...
Forum: LIVE PLC Questions And Answers January 21st, 2020, 04:49 PM
Replies: 12
Views: 610
Posted By jraef
A-B PowerFlex 40, 70, 700 and 750 drives all have...

A-B PowerFlex 40, 70, 700 and 750 drives all have a PLC-like functionality built in, called "DeviceLogix" to where you can use I/O in the VFD independently of the VFD's operation. I believe Siemens...
Forum: LIVE PLC Questions And Answers January 20th, 2020, 02:11 PM
Replies: 11
Views: 763
Posted By jraef
"Properly sized...". How, by virtue of the...

"Properly sized...". How, by virtue of the manual? Because as Gary correctly pointed out, you may have missed the part that says even if you properly size the brake resistors, the PF525, like all...
Forum: LIVE PLC Questions And Answers January 17th, 2020, 03:35 PM
Replies: 12
Views: 375
Posted By jraef
Is this drive plugged into a port on a managed...

Is this drive plugged into a port on a managed switch that is assigned this .194 IP address? Because if Port Persistence is enabled, the switch will push the assigned IP address (.194) into the drive...
Forum: LIVE PLC Questions And Answers January 17th, 2020, 01:12 PM
Replies: 2
Views: 251
Posted By jraef
NOM (Normas Oficiales Mexicanas) is the official...

NOM (Normas Oficiales Mexicanas) is the official standards organization that requires certification and labeling. Most of the NRTLs like UL, Intertek etc. can provide you with that certification and...
Forum: LIVE PLC Questions And Answers January 10th, 2020, 05:21 PM
Replies: 11
Views: 700
Posted By jraef
F71 on a PF70/700 means there is a general fault...

F71 on a PF70/700 means there is a general fault on the DPI device that is plugged into Port 1, you must look at the device event queue of the DPI device itself to see what that fault was. Most...
Forum: LIVE PLC Questions And Answers January 3rd, 2020, 04:53 PM
Replies: 12
Views: 793
Posted By jraef
Well, technically there IS, but not with the...

Well, technically there IS, but not with the hardware you have now... What someone was doing (I'm guessing) was to somehow provide an educated guess at what was needed on the two drives to try to...
Forum: LIVE PLC Questions And Answers January 2nd, 2020, 07:16 PM
Replies: 4
Views: 600
Posted By jraef
Those devices are UL listed as UL508 Manual Motor...

Those devices are UL listed as UL508 Manual Motor Starters or as "Motor Protection Circuit Breakers", but in either case, the listing has the word "motor" in it, so any use that is not a motor would...
Forum: LIVE PLC Questions And Answers January 2nd, 2020, 06:03 PM
Replies: 7
Views: 586
Posted By jraef
Your profile says "United nations" as your...

Your profile says "United nations" as your location, which is too ambiguous to know where you actually are. But we can assume based on the fact that you even ASK this question that you are somewhere...
Forum: LIVE PLC Questions And Answers January 1st, 2020, 02:27 PM
Replies: 12
Views: 793
Posted By jraef
Correct, you need a torque follower setup but the...

Correct, you need a torque follower setup but the 525 does not do torque control mode, you cannot use it for this with any reasonable degree of success unless maybe you have a dancer loop in the...
Forum: LIVE PLC Questions And Answers December 24th, 2019, 04:52 PM
Replies: 7
Views: 722
Posted By jraef
Last time I checked, Georgia is not considered...

Last time I checked, Georgia is not considered “Western U.S.” ...

A-B, ABB, Yaskawa, Toshiba and Mitsubishi all make great drives and have good tech support, but the only one that has a...
Forum: LIVE PLC Questions And Answers December 24th, 2019, 04:42 PM
Replies: 106
Views: 6,607
Posted By jraef
https://www.greencarreports.com/news/1096801_tesla...

https://www.greencarreports.com/news/1096801_tesla-model-s-battery-life-how-much-range-loss-for-electric-car-over-time

Seems to corroborate what he said.

For what it’s worth, Elon has no...
Forum: LIVE PLC Questions And Answers December 23rd, 2019, 04:08 PM
Replies: 106
Views: 6,607
Posted By jraef
Tesla (the company) is not in the car making...

Tesla (the company) is not in the car making business, they are in the energy storage business. Making cool electric cars was a way to use his battery technology and launch the company, but in the...
Forum: LIVE PLC Questions And Answers December 16th, 2019, 06:17 PM
Replies: 8
Views: 2,293
Posted By jraef
I would assume that since it was 303, the ground...

I would assume that since it was 303, the ground fault was likely on the line side somewhere.
Showing results 1 to 25 of 500

 
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