Internet PLC Forum

How do I reference these additional 32 bit variables in my touch screen?

I am using modbus.  I only need on 32 bit register.

I am using a DM register as a total products produced counter using each on/off transition of a photocell to increment DM[n] +1.

This works fine until count 32768 when the numbers display negative and decrements.  I am certain it relates to the max value a DM register can hold, but I am uncertain how to overcome this issue.

My HMI reads this register and displays it's value to the machine operator.  Any suggestions?

First, thanks for a great product!  I use your T100MD1616+  for all of my OEM products.

I have found that when installed correctly, this PLC functions flawlessly.  I have one operating a communications system that has been functioning without incident for almost 2 years!

Now to my question.  I would like to use a 0-5V reference voltage to control low speed cutoff for a valve
that applies a coating to a surface at high speeds.  I have already used both high speed counter inputs for other measurement purposes leaving no available high speed inputs for frequency measurement.  Can I use the analog input to measure 0-4096 based on input voltage to turn the valve off at some predefined voltage level, or should I consider another method to achieve the desired result?  My project is on a very tight budget.

Thanks again for a versatile controller and great tech support.