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Hey Guys, How does one calculate motor fusing requirements? I would like to fuse before the starter and at the main disconnect. (10 ft away) Example: 3 HP Motor: 460 (480) Volts: 4.8 FLA: Would I take 4.8 * 120%? (Before motor starter) Would I take 4.8 * 150%? (At the Disconnect) How does one calculate disconnect fusing with 5 motors. (Using above example) "You definitely want to add all of the MAX amps for a total full load rating. That becomes the worst case scenario. Then add 10 to 50% for heat de-rating. Your local code should be consulted for the exact amount of de-rating based on length of the cable run" "For panels with motor loads you typically take the motor with the largest current draw and multiply it by 125%, then add all of the other motor loads to that for a total (of motors only). Then add in other loads such as transformers, etc." Are the above statements correct?

We currently have a machine in our facility that is started by a single start button. Today I was asked to see if I could eliminate the start button and use the door switch as machine start; is this safe? Currently the operators have to load the machine; closes the door and then press start to initiate auto cycle. Now they want the operator to load the machine; close the door and auto cycle will initiate. Note: This machine is not a press its simple a cutting machine that is protected by door guarding and E-stops. I currently purchased the NFPA 79 Electrical Standard for Industrial Machinery 2007 Edition and I cannot see any reason why not to under “Enabling Control” 9.2.5.7. Thank you,

Hello, I recently installed a Keyence Micro meter to an existing machine with Allen Bradley controls and I need to be able to store downtime in the event of a power loss. I currently have some experience with S: 1/15 (First Pass) and S: 37-42 bits; but I don’t know how to utilize them correctly to get me what I want. I want to able to store downtime, compare it to the current time and if im greater than an hour fault the machine out. I played with the idea on utilizing an input but I don’t want to use I/O if I don’t have to. Slc 5/04 Thank you

This is what I use as my AFI.

Okie's method is what I want to do; I just dont know how. How would I let the processor know that I lost power and to immediatly store my information? I want to acomplish this without using any additional I/O. The reason for this madness is for... When the machine losses power and the "acc. time" is greater than an hour upon "Start up"; the Keyence micro-meter requires 30 min to warm up. (In order to function correctly)

No UPS on this machine.

I guess I need to explain myself better. When the machine looses power for any reason; I want to be able to capture "time lost" during power failure and compare it to "current time" once the processor is in run mode. Then I can calculate what action to perform. Thanks.....

Meter downtime Thanks.....

BUMP

Miscellaneous stuff for sale; all items are in working order. I will accept and entertain all reasonable offers. 1. Mitsubishi A0J2E-E32D Input card 2. Rep Card: KPA 0410/14 3. A/B 1745-PCC:Slc personal computer interface converter: sold 4. 2-A/B 1746-IA16: Input cards: New (not in box); sold 5. A/B 1747-L40A (Shoebox) : sold 6. A/B 1747-L40C (Shoebox): sold 7. 6-A/B 1761-NET-AIC SER B: sold 8. 2- A/B 1761-L32BWA (Micro logic): sold 9. 2-A/B 1746-OA8 (Output card) :sold 10. A/B 1747-l514 (5/01 processor): sold 11. A/B 1746-OX8 (Output card): sold 12. Proface HMI (Total control Jr.): sold 13. Industrial Control systems design: Author:Michael J Grimble:$275.00 Thank you,

Thanks for all the help!!! I told them no today it cannot be done safely.

"What is the reason they want the automatic start ? The operators forget to push start ? Or has the plant manager calculated the time savings between closing the door and pushing the start button will result in an overall savings of $100 a month ?" PDL...you hit the nail on the head; they feel they can save money by doing this. I told them that this was an unsafe practice; but i need facts to back me up. Any help would be appreciated.

Could you tell me if I am on the right path. Motor Name plate: 15 hp Motor 208 Volt 37.5 Amps FLA Panel Fuse: Time Delay fuse 37.5A x 175%= 65.625Amp Buss box fuse: Time Delay fuse 37.5A x 175%=65.625Amp Wire size in panel: #6 37.5x120%=45 amps Wire size going to Buss box: 140 ft x (37.5x120%) amps x 1= 6300 5.5 x 1000000/6300= 873.016 Wire size at 80% power factor= #6 Conduit size 1 inch EMT Overload device: Thermal/Magnetic 37.5x115%=43.125 Amps

So let me get this straight. I would fuse each leg before the motor starter with 9 amp fuses. And since i using a disconnect bus drop that is fused i should use the same size fuse?

How would I properly fuse at the disconnet; for one motor? 8.4+4.8=13.2????

How can one implement scrolling text in a Allen Bradley Panel View Plus HMI? Currently using RSVIEW Studio-Machine Edition Software. Thank you, Frank

I think I may have got it by using Text/Animation/Horizontal position. Let me know if you experts have another way of doing it!!! Thank You, Frank

Hello, Im currently installing a Keyence CCD Laser Micrometer to one of are existing machines; and im having trouble with end result after scaling. Example: Keyence controller states 35mm and my scale result is 29mm. At this point I just want to know which scaling method is right. A/B Setup: Ø A/B-5/04 Ø A/B-1746-NI8 Ø Channel 7 Ø Wiring: Differential single source Ø Voltage/Current dip switch: Set to voltage (All channels) Ø Cable used-Standard "Blue Hose" Ø Channel (7) configuration :0000100000011000: · +/- 10 volts · 1746-NI4 data format · Channel enabled Keyence laser micrometer Setup: Ø Output +/- 7 volts dc thanks...

I have a question for you guys. How do you guys control your electrical prints? Let’s say you make a copy for an electrician so that they can make the necessary changes that you requested. How would you mark that print? Would working copy be ok? Also how would you mark the machine copy and destroyed copy? My main goal is to control what I put on paper. Any help would appreciate. Thanks……

Why are printed copies not considered controlled? Where can I info on that statment?

I was asked to somehow come up with a way to control my paper prints. An example would be like if I had an electrician make some changes for me I would give them a working copy with notes on how I would like the job done and so on and once they are done with the print they would destroy it. With a machine print I would label controlled along with the date. Do any of you do this, our am I this going to extremes?

You can't using RSView Studio, you will need the orginal APA. file to make changes.

Slc 504 1746-NI4 Analog card Honey well AL111 model 41EN,2T,30A 0-10 Volts dc with a range of 0 to 30,000 lbs I need to convert counts to newtons. Which program is better and why and is there a better way to do it. SCP_TO_NEWTONS_1.RSS SCP_TO_NEWTONS_2.RSS Thanks .......

How can I be sure that my load cell is working properly?

Hello, I have an application at work where im taking counts to Newton's. My question is, is the logic correct and why did they not use a scale with parameters instruction. I think im getting false readings. Thanks...