Mitsubishi GX Works2 Structured Text: Logical NOT not working

Panther

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Join Date
Sep 2017
Location
Singapore
Posts
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New to GX Works2 (Structured Text), and encountered an interesting puzzle that the logical NOT didn't work as expected.

Ex. NOT 0 turns out to be 0, while 1 is expected.

Kindly refer to the GX Works2 monitor screen attached, and advise what could be wrong.

Thanks for your time and help.

Not 0 is still 0.png
 

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