problem with the shift register

for purposes of simplicity, I remove code without problems

Description:
1. my state machines, for some reason, a lot of cases.
2. the order of each case may not change.
3. the main prupose is to get the difference as on the front panel
4. prior to entry difference, I first is measured in the case where 2 and TRY using shift register to pass data, ideally at least 5
5. However, the "previous" value is updated too soon, unlike 'get' is always ZERO.

for example
You can see the shift register on the left side has two components, ideally, the 'get' difference should display 2-0 = 2.
However, given that the second element of the registry team updates too early, my objective cannot reach and meet up with ALWAYS 0

I think it's my misuse of the shift register for the computer to several cases.

I pasted this problem for 4 hours... kind of stupid, but could not understand

in a mulit-case state machine, how to properly passes data to the case (5 in this example) INSTRUCTION to ensure that I get the correct calculation

GOLD: because I am only looking to the current value and the previous value, are there other ways to get this problem is?

Thank you

It is a case where execution highlighting can be helpful. Turn on execution highlighting by clicking the light bulb on the block diagram toolbar. Then, run the VI.  You will see the left side of the team to register the change as the state machine goes through States 3 and 4.  At the time where what happens to 5, all data in the change record is identical.

One of them might be to use two registers to offset, one for the current value and the other for the previous value.

Lynn

Tags: NI Software

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