Panasonic FP0 Series, User Manual

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Precautions During Programming FP0
8 − 21
8.7 Rewrite Function During RUN
Instructions which do not allow rewriting during RUN
Step ladder instructions ( SSTP/STPE )
Subroutine instructions ( SUB/RET )
Interrupt instructions ( INT/IRET )
Control instructions ( ED/LBL )
(LBL instructions allow insertion and writing, but not deletion and clearing.)
Instructions which do not allow rewriting to subprograms
The following instructions do not allow rewriting during subroutines or interrupt
programs.
Jump/label instructions ( JP/LBL )
Loop/label instructions ( LOOP/LBL )
Master control relay/master control relay end instructions ( MC/MCE )
Cases where rewriting is not possible during RUN
When a syntax error has occurred.
During forced input/output operation
Interrupt Restrictions
When using interrupt, high-speed counter, pulse output or PWM output functions, do
not perform a rewrite during RUN.
If a rewrite during RUN is executed, the following problems may occur. Exercise caution.
Interrupt programs will be disabled. Enable by executing an
ICTL instruction once
again.
Example: Using R9034 (rewrite during RUN completed flag)
R9013
ICTL, S1, S2
R9034
The high-speed counter will continue to count.
At 2.5 kHz or higher during one − phase, one channel counting or 1.25 Hz or higher
during one − phase, two channel counting, miscounts may occur.
Target value match on/off instructions ( F166/F167 ) will continue.
Coincidence programs will be disabled.
Pulse output and PWM output will be stopped. The
F168 instruction (positioning control)
will continue to operate.
However, when the maximum output frequency is higher than 2.5 kHz during
one − phase, one channel counting or 1.25 Hz during one − phase, two channel counting,
the output pulse number may differ from the set number.