Ken Moore

Use the photo eye to enable a TON and have a NOT .DN bit in parallel to latch in timer so it will continue to time after the photo eye is clear. The use the .TT bit to run the motor.

Welcome to the forum, and thanks for sharing.

Interesting, thanks

I think size is factor also. Which has the biggest impact on your exposure, 10, 100 point projects, or one 2500 point project?

I do not think there is a market for an industrial machine controlled from a smart phone. For a home application yes, factory no. Someone would have to design and build a machine with a PLC, then someone else would develop a smart phone app to manipulate words and bits.

Take a look at the Red Lion Data Station http://www.redlion.net/Products/HumanMachineInterface/DataStationPlus.html

HI folks, I have a client that recently haired a new grad Chemical Engineer to assume the role of "controls" engineer. They plan on sending him to ladder logic trainging, HMI training, and loop tuning training. They asked me for a recommended class on loop tuning. I do not have a clue, never been to one, and loop tuning is not one of my strengths. Has anyone been to a class, that they would recommend?

I used to work at a chemical plant, and the way I understand the rules, the limits are based on workers exposure during an entire 8 hour shift. So if you get a small spike at the beginning of a shift, but only small ripples the rest of the time, then the time weighted average will be within limits. So the average must be over an 8 hour period, you want the low values so the high values are evened out over time. The big question is how often do you sample. If this was my project, I would record the values once a minute and then average every hour, at the end/start of a new shift, average the last eight hourly averages. Or you could do a rolling 8 hour average also. Someone within your organization has to specify exactly what the requirements are, until then you have no way of knowing how to write the logic.

I can't remember, does the ML1400 have a real time clock? If it does your problem can be easily handled.

If it is relevant to the topic you can post links and names of companies that may help. Board admin.

Always considered FLUKE as the standard, never used another brand.

Do you have the software and need help with the procedure? If you asking someone to furnish the software, we do not allow that on this site.

I would try swapping the chassis power supplies.

Well done Ken, got tired of watching NCAA B-Ball?

Glad to help, glad it worked.

Do you have an HP or Compaq laptop? It may be a BIOS setting. http://cid-25ab668da...N-switching.png

I assume they will ship to the UK, I have been using cables from this site: https://www.theautomationstore.com/index.php?page=shop.product_details&flypage=flypage-ask.tpl&product_id=82&category_id=47&option=com_virtuemart&Itemid=2 Never had any issues.

Most mass meters can do a pulse output and/or a 4-20ma signal. Do you have any influence on the meter output configuration? If I remember correctly a barrel is 42 gallons, so set up the meter for one pulse per gallon and count 84 pulses, then take a sample.

Nice, thanks for the update.

In my world B&R is not a factor, never seen one. My customers use mostly Siemens, Allen-Bradley aka Rockwell, and a few TI/Siemens 505 systems. However, we mostly work with the Oil/chemicals industry so machine builders may have used this brand.

Thanks, the ISA course looks interesting.

I moved this to the Modicon forum, you should get a better response here.

When other people approach you and ask your advice about S7, then you can consider yourself a Siemens PLC engineer.

There are analog PLC cards with higher resolution than 12 bits, many vendors now have 16 bit resolution. 500,000pa / 32767 =15.26 or a 15 bit card will give you around 31 still less than 50. Are you using existing hardware, or are you able to purchase new? If you get an transducer with a range of 4-5 bar, it will still have an output of 4-20 mA, 4mA = 4 bar 20mA = 5 bar So you would end up with 100,000 / 4096 = 24.4

I also recommend the CLX chassis as a bridge to ethernet. I am not familiar with the Wonder Ware driver, but you have to specify the CIP path for the various PLC's this can be a little difficult the first time. With RSLynx it is seamless , works great