Mitsubishi MELSEC FX3U Series

4 Conversion of the Projects
4.4 Precautions when Replacing Other Functions
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4.4 Precautions when Replacing Other Functions
Precautions when Using the High-speed Counters
When the high-speed counters (C235 to C255) are used with FX3U/FX3UC, it will not operate by just replacing to MELSEC
iQ-F. It is necessary to set the FX3 Series compatible high-speed counters and change the program by the parameter. For the
setting procedure, refer to the following.
Parameter Setting Procedure of the FX3 Series Compatible High-speed Counters
1. Select “Long Counter Specification” at the specification for High-speed counters.
[Parameter]  [FX5UCPU]  [Module Parameter]  [High Speed I/O]  “Input Function”  “High Speed Counter” 
“Detailed Setting”  “Other”