Hi,
I am currently using VIM2 to communicate to a ControlLogix via Class 3 UCMM tag access. I set up 3 datatypes (Boolean, DINT, floating point) with output w/ readback. I was able to sent/receive data for the Boolean and DINT tags, however I can only receive floating points data (cannot send data from VIM2 to ControlLogix). Any value I put into the .....DS#/R# do not write to the tag on the ControlLogix. I know that with an UCMM setup, the value is passed through as the first scan. (ie. if VIM2 initiates the change then the tag becomes the assigned value from the VIM2, vise versa, if the tag value change is initiated on the ControlLogix side, it will pass to the VIM2).
On the ControlLogix side, there is no code that is constantly writing to the tag, so I am ruling out "last scans" possibility where some logic is writing to the tag. I read somewhere on this forum that UCMM DF-1 does work with floating points, but is that the same with UCMM Tag Access?