ctci04

[ctci04]

Hi. Need advise on how to address individual bits from a channel I am reading from a controller.

Please advise which command to use...I need the bit to light up a LED display on the DAQ

Thanks

LAM

[AzeoTech]

First, see if you can read the bits individually from the controller.  Many controllers will offer discrete I/O both in packed form on an input / holding register, or as individual bits using coils / input status registers.

But if you have to get it packed, just use the testbit() function.  So in your LED, if you want it to light up if bit 3 (numbered from 0, so the 4th bit) is on for "MyChannel", you would do:

testbit(MyChannel[0], 3)