help with calculation and roundup from real

[foxtrot99]

I want to do a calculation in the FX3u-48MT ESS and combine it with the input from HMI GOT1020. By the time i put input in the HMI with real number, and i calculate that with some equation just like in the manual as seen in the picture. I was confused when the result in the DINT is too many and in the pulse, it got minus, when it should be plus. Is there any way to fix this ? and how to round up the result correctly ?

I really appreciate your help. Thanks in advance.

 

Edited July 3, 2017 by foxtrot99
wrong picture

[JRoss]

The result of your DINT instruction is 32-bit, but your PLSY instruction is only 16-bit. So you're seeing the decimal representation of the lower half of a 32-bit word, which is basically useless. You need to use DPLSY, the 32-bit version of the PLSY instruction.

[foxtrot99]

5 hours ago, JRoss said:

The result of your DINT instruction is 32-bit, but your PLSY instruction is only 16-bit. So you're seeing the decimal representation of the lower half of a 32-bit word, which is basically useless. You need to use DPLSY, the 32-bit version of the PLSY instruction.

wow, thank you so much. it solved. i really appreciate your help.