Data Sampler with Bits

[Dave]

I want to create a data sampler that monitors a number of bits and integers, for troubleshooting purposes. As far as I can see, I can only assign integers or REAL numbers to the feed tags.

I know I could compare each bit status and store either 1 or 0 into an integer, then use those integers in the data sampler.... but I have a large number of bits that I want to monitor and was hoping there is a better way.

Any ideas?

[Joe Tauser]

Have you considered using the Bits to Num instruction and copying bit arrays to UINT32 tags?

Joe T.

[bobnorway]

perhaps by packing 8 or 16 or 32 bits to an uint then store a copy and compare with it.

any value change can then trigger an unpack rutine  to identify which bit changed.

[Dave]

Thanks for your replies.

The bits I need to monitor are not contigious, but I will look at the Bits to NUM instruction anyway...I haven't used that before.

As for "packing/unpacking bits into a UINT", I'm not exactly sure how to go about doing that.

[bobnorway]

heres a quick example of what I ment packing bits, the bit order does not have to be contigious

It should be flexible enough so you can get something done.

Test_Bits.ulpr