Mitsubishi MELSEC FX3U Series Handbook page 52

2.
Set the function of the high-speed counters used at FX3U/FX3UC.
Select the input comparison enable/disable of the counter device and preset input compatible with the FX3 Series, and select
the control switch.
Changing the Program
Change the high-speed counter program by referring to the following program example.
[Example of program]
M0
C235
M0
UDCNTF
LC35
4 Conversion of the Projects
50
4.4 Precautions when Replacing Other Functions
K10000
C235
Y001
Change to
LC35 K10000
Y001