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Thanks guys, both answers make all the sence in the world.

Ok Guys, I am looking for opions here. In my plant we have a panel with 2 transformers. a 3KVA just for control power and a 2 KVA just for the AC. Before my time an AC unit was replaced with a wrong model, a 230VAC unit. Being good little electrician and wanting to get the system back up, they...

Thanks Dave Great post, Kept us laughing for a while, and very informative as the other posts have been. Thanks to all. Daskat

I am in the middle of a discussion with a friend on the possible use of a VFD for the operation of a Home AC compressor. I think this would greatly enhance the longevity of the system and increase the efficiency also. Any thoughts on this?

John, Thank you for the valuable post. I would love more info and your post was one of the most concise I have read on this site. Keep up the good work. ssn_tough@yahoo.com

Hey folks, I work for an instrumentation and testing firm and am wondering how to get certified as a thermal imaging inspector in order to help my company grow. Any help would be appreciated. DASKAT

How about an Allen bradley Pico controller cheap and you can use it to set alarms or or indicators. less than 200 bucks.

Would this be a Prosoft Card? If so there is a softwear disk that came with the card. Warning these cards will Probably take the better part of a week to learn and require alot of asprin. you will also need to determine the commands and address accepted by the UDC3000 then you must decide if the...

Jonesy Thanks I finially got it to work and have made the following observations. 1) The control block is at least 10 words long so don't have the control block in the same file as the words being transfered. 2) Yes this command can be programmed online using RSLogix 5. so again thanks and have...

Me again, I was wondering if any knows how to access 2 PLC's in the same project or if it is even possible? TTFN THE KAT

Hi folks I am attempting to share data between 2 AB PLC-5's I have tried to no avail to send one simple word between them. Both PLC's are on the same DH network. I continueously get an error message that I have not correctly formatted the control block. The questions I have are 1) Is this...

Thank you so much that maks all the sense in the world. I'll have a tougher one next time.

I am using AB Powerflex 4 drives for a conveying system. The drives are 1 Hp while the motor are only 1/2 Hp. These drives are being controlled by an after market modbus protocol card. And the Question is this, When the drive starts it does not ramp, instead it goes directly to its max Freq then...

Rdub, thanks for the help but every time I attempt to use the MOD function in the program my PLC crashes horifically and I think the basic equations may be off as I attempted to work them by hand and was unable to come up with a sufficient answer.But thanks again for your time. TTFN THE KAT

Say Folks, I am attempting to create a vibration analysis program in my plant. about 11 years ago to company bought an IRD fast track monitor and the IQ 2000 software. I have resurected the monitor but I am mising disk 1 of 5 of the IQ 2000 software. I know that IRD was bought out by Entek which...

Does any one know of an algorithm for converting the date stored in the S2 status file to the day of the week? I have been toying with this and am having dificulty trying to truncate and find the mod ie the remainder of a division while trying to program this PLC-5.thanks again folks THE KAT

Well folks, I answered my own question. The problem was I did not place a sufficient time delay between the issueing of each command. I found that with increasing the time delay to only 10 milliseconds the commands flowed flawlessly with zero errors. Hope that helps any one else with these silly...

I understand the importance of vibrational and how it can be used to predict bearing and alignment problems. The question is does any one know where online you can find information on the various harmonics and frequencies which identify problems ie 7/8 base freq is indicative of an inner race...

Hey Skiier, good call on checking for overload degradation, I forgot that one. and PS I didn't do the original post. TTFN THE KAT

I am using a prosoft modbus card to control a number of AB powerflex 4 drives but I find my block transfers jump aroundto the various data areas and the drives do not respond as quickly as I would like. Any help on this one?