Update to post: Problem occurs with Voltage Input, Current Input, Voltage
Output, and Current Output. Original post dealt with Voltage Output only.
In the Voltage AO block, what i'm looking to do is turn a 0-100% logic signal into
a 0-10V output signal. What is happening is that anything you plug in for the
Electrical Scale Top (Red circle) replaces anything in the Engineering Scale Top
(green circle), no matter what order you do.
The value i'm sending this block is 50%. What i'm expecting to see is 5V.
The blue circle is showing a voltage of 10V which would be true with the
range selected in the red and green circles. 50 is higher than the 10
engineering scale top...which yields 10V
So there's two items in question:
1) Allowing the Electrical Scale Top to be adjusted independently of the Electrical
2) The Present Value would need to be 50% for an Electrical Value of 5V.
With the ranges shown above, I can't differentiate what the Present Value is
currently looking at....input percent value in use or voltage, due to the
upper ranges in each section always becoming the same number.
Solved! Go to Solution.
Updating the post to include Voltage Inputs, Current Inputs, Voltage Outputs,
and Current Outputs as all having the same auto conversion issue.
I'm still seeing this as an issue in the iteration 22 release. The issue tracking log says it was to be fixed in iteration 19.
The issue now appears to be it sends the electrical scale settings to the engineering scale setting and vice versa. Here's a capture of the EBO voltage output write command.
Here's the capture from the N4 driver showing the opposite order.
I think you found a different, yet related issue here and I'm glad you did. The order Niagra was writing the properties was consistent with the way the property was documented in the PICS but is not consistent with how EBO writes the property. I've added a new issue to get this fixed in Niagra and have also sent an email to the owner of the PICS document to get that corrected in a future version as well.
The original issue I reported to Tridium was: The value specified for Electrical_Scale_Top is also written to Engineering_Scale_Top and this issue was fixed in v19.
What Dan reported I would consider a different defect where the Electrical Top/Bottom and Engineering Top/Bottom are reversed. I just reported this to Tridium.
It's still looking like the same flip flop item mentioned in the Version #3 issues post where
the electrical section and engineering sections are entirely flip-flopped for what the values
do. Different from the earlier, value replacement issue. The way Tridium is writing the values,
in your picture it makes sense now.
To get 50% output and 5 Volts, you had to transpose the tables. As long as it gets fixed
by Tridium, that's all that matters and it can be one less item.
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