Mitsubishi Electric MELSEC-L02SCPU User Manual page 164

(5) Pulse instructions
The pulse instructions such as IPPSTRT1P and IPSIMULP are executed at the leading edge of their execution
command. If these instructions are used in an interrupt program or subroutine, they are not executed until the
second or later leading edge of their execution command is detected.
Ex.
Executing the IPPSTRT1P in an interrupt program
END 0
X0 OFF
IPPSTRT1P
OFF
(6) Precautions on IPSTOP1
(a) IPSTOP1 and positioning control
If an attempt is made to start positioning control while the IPSTOP1 is still being executed, a "Stop instruction
ON at start" error (Axis 1 error code: 1102) occurs and positioning does not start.
(b) IPSTOP1 and Axis 1 positioning completion (SM1841)
When the deceleration stop is complete due to the IPSTOP1, the Axis 1 positioning completion (SM1841) does
not turn on.
(c) Execution command for the IPSTOP1
The execution command for the IPSTOP1 must remain on for at least 2 ms. If the execution command does not
remain on for at least 2 ms, it may not be detected.
(7) Speed setting
If the speed set by the IPDSTRT1(P), IPJOG1, or IPSPCHG1(P) is outside 0 to 200000, the axis may operate at
the speed limit.
162
X0
IPPSTRT1P
I0 IRET I0
ON
X0
IPPSTRT1P
IRET END 0
Execution of IPPSTRT1P
X0
IPPSTRT1P
I0 IRET END 0
IPPSTRT1P is not executed even if
the execution condition is on because
no change was made since the previous
interrupt program execution."