Can we get a better High Speed Counter?

[Greg Smith]

Hello,

 

I'm programming challenged and like the easy Rockwell Automation world, just not the price.  So Unitronics has nice powerful solutions, but the software seems to lag behind a bit...  So... what I'd like to be able to do in the Unistream platform is over-write the "read only" register "current count" from the UID-0808THS module.  I have shaft encoders and prefer to work on the positive side of the number line.  Negative roll over is a programming headache for me.

 

The application is a mechanical jack screw with 60 PPR A quad B encoder, signal feedback and wiring is easy and works fine.  In my control code I take the raw data and scale to engineering units to yield a linear position feedback (jackscrew moving the load a specified distance).

 

In the Rockwell world, I can turn the counter off, reset to zero or some "preset" value that is meaningful to the application.  What's nice about that is the programming is far easier and I can prevent roll-over problems by offsetting the number line using the preset value = non-zero value + a safety margin in counts (could be 10 x the feedback counts per rev.)

 

 

Does anyone reading this have has an application similar to this written in Unistream / Unilogic platform?  I have my program attached if you are curious about the hardware and software setup.  Version 1.7 rev 62.

 

 

If not, then I ask the capable guru's at Unitronics to consider enhancements to high speed counter firmware.

 

Thanks,

Greg

[Ofir]

Hi Greg,

 

In the latest version of UniLogic there is an option to reset the counter using a bit on the THS struct.

If you wish to set a preset value then you can review the attached application which uses a virtual counter which is based on the THS counter.

Virtual Preset HSC_070.ulpr

[Greg Smith]

Ofir,

 

Thank you for your high speed counter example logi, it was extremely simple and helpful!

 

Thanks,

Greg

[CTP]

How can I preset a counter in a UID-0808THS module. It is read only currently. In case of a power failure the counter resets and I have to calibrate the machine again.

 

It is not possible to retain the tag!

[Ausman]

Can you do the same solution as done for Vision systems?

https://forum.unitronics.com/topic/6118-hsc-resets-dw-counter-after-power-cut/