Stage/Step Ladder Logic

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GTPS

I want to replace old Koyo PLC with new Nais PLC FP0. I want to know the equivalent Nais PLC instructions for the following Koyo PLC instructions:

1. Initial Stage. All the stages referred as I.SG (Initial Stage) will be executed during Power On of PLC
2. Set Stage (SET.SG) for setting on any Stage
3. Reset Stage (RST.SG) for resetting the stage
4. Reset Counter (RST.CNT nnn) for Resetting Counter
I find only "NSTP" and "SSTP" instructions in Nais PLC. How can I use these two instructions for above stage ladder instructions?
 
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