COM Object ActiveX .dll This zip file contains an ActiveX .dll file that can be used to implement SCADA. UnCmDrv1.dll file contains methods and properties for invoking the OPLC, read / write, locally or remotely, implementation examples, and an explanation of accessing Data Tables.
At this time only Prolific chip based drivers are supported (original Prolific chip) at windows and at PLC.
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is it possible to install a new USB driver into tha Unistream PLC? It is a USB/RS232 convertor. They have a driver for Linux.
I have to communicate with a measuring instrument via USB. This instrument works properly with their software on Windows, but not when I want to communicate with my PLC.
I have the communication protocol, wich I follow litterly.
Think back to your youth to when you took algebra. Hopefully you took algebra. And you may be still in your youth.
A linear block is just that - a line equation. It creates a unique Y for each X.
For your application I chose a timebase of one minute, so your entire x axis is 180. Make a one minute timer to increment an MI every minute to feed the X value of the block.
So X1 = 0, X2 = 180 , Y1 = 0, Y2 = 1000.
Let us know if you still don't understand how I got the values for the Linear block.
Your homework now is to implement the above into a program and post it here with any more questions you have.
For clarity of numbers, have a look at my calculator from here:
Play with numbers as appropriate and watch the result. The idea for ramping is to relate the time elapsed to the desired temperature at that elapsed time, and then control heaters appropriately to match the desired temp.