Recent content by jumana

Try this website https://www.predig.com/resources. There are a good number of educational videos and white papers. <b>Moderator's Note:</b> This link only works if you <b>copy and paste</b> it into your browser. If you just click on it, you get a 404 message.

Chris, Here is an example: Register number = 40001 is the same as register address = 0 = data address. Each slave device forms a node; you can have up to 32 without a repeater, as explained by previous post.

I agree, Modbus Poll is an excellent tool and it's not expensive. You do not need to join Modbus.org. Modbus Poll can also be used with Enron Modbus.

This company makes distance sensors with Modbus RTU communication. https://senix.com/ A PLC or a Modbus scanner might be the best solution.

There are a few companies offering solutions for your application. Here is a link to one of them: http://www.mtssensors.com/products/liquid-level-transmitters/RefineME/index.html If you choose a level sensor with Modbus RTU, you can use a meter/controller to perform the draining operations...

Most level applications are satisfied with a simple on/off level controller. See the example provided on page 6 of this datasheet. https://www.predig.com/sites/default/files/documents/LDS6000.pdf

The Modbus slave will provide the process value, it's up to you what you do with the data at the other end (Master device).

See this manual for wiring examples, simply substitute the meter with your controller. https://www.predig.com/sites/default/files/documents/LIM765QS.pdf Best regards, JUmana

To "convert" ohms to voltage you need to apply a constant current, then measure the voltage drop across using another pair of wires. Unless you are familiar with intrinsic safety or hazardous areas requirements, I wouldn't recommend making changes to your fuel sensor circuit; you could create an...