Panasonic FP-E Programming Manual page 188

Basic Instructions
NSTL (Next step, scan execution type) instruction:
NSTP (Next step, differential (pulse) execution type) instruction:
When an NSTPn or NSTLn instruction is executed, the process with the same process number "n" as the
NSTP or NSTL instruction is opened.
The execution condition (trigger) for the next step instruction means the execution condition (trigger) to start
the process.
X0
NSTP 1
SSTP 1
R0
NSTL 2
SSTP 2
Declare the first process to start in the next step instruction in the ordinary ladder area.
A process can be started from the ordinary ladder area or from an already started process.
However, when you start a process with a next step instruction from within a process, the process that is
operating and contains the next step instruction is automatically cleared and the specified process starts.
Be aware that the outputs and other processes are actually turned off by the clear operation during the next
scan.
The NSTP instruction is a differential (pulse) execution type instruction, so it is executed for only one time
when the execution condition (trigger) turns on. Also, since it only detects if the execution condition (trigger)
has changed between on and off, when switched to the RUN mode or when the power supply is turned on
while in the RUN mode and the execution condition (trigger) is already on, the instruction is not executed.
RUN
(Power: on)
Shift input
Operations
with NSTP
Not
executed
Operations
with NSTL
Executed
When you use the NSTP instruction with one of the following instructions that changes the order of the
execution of instructions, be aware that the operation of the instructions will differ depending on the timing of
their execution and their triggers.
− MC to MCE instructions
− JP to LBL instructions
− F19 (SJP) −LBL instructions
− LOOP to LBL instructions
− CNDE instruction
− Step ladder instructions
− Subroutine instruction
When combining the NSTP instruction with an ANS or POPS instruction, be careful that the programming is
correct.
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X0: off on
SSTP1: Starts
R0: on
SSTP1: Cleared
SSTP2: Starts
Executed
Executed