Restrictions - Mitsubishi 00JCPU User Manual

6.22.4Restrictions

This section describes restrictions on execution of the high speed interrupt function.
If the function is executed incorrectly, "WDT ERROR" may occur or the high speed interrupt may not be executed at
the specified intervals.
There are the following four kinds of restriction items
(1) Restrictions that apply to all the high speed interrupt setting
(2) Restrictions that apply to the high speed interrupt only
(3) Items that delay the high speed interrupt start due to disabled interrupt
(4) Items other than the above ((1) to (3))
The time required for running interrupt program once must not exceed the specified interrupt interval.
(If exceeded, the operation of the high speed interrupt cannot be guaranteed.)
(1) Restrictions that apply to all the high speed interrupt setting
Item
QA1S5 B, QA1S6 B,
Base unit QA1S6ADP+A1S5 B/A1S6 B, QA6 B and
QA6ADP+A5 B/A6 B cannot be used.
Multiple CPU system Not available for multiple CPU systems.
The PR/PRC, UDCNT1/2, PLSY, PWM, SPD,
Instruction and PLOADP/PUNLOADP/PSWAPP
instructions are not executable.
Any instruction of which processing time is
Instruction longer than the high speed interrupt interval
cannot be used.
Programming unit No programming unit can be connected.
The following two SFC functions are not
executable.
SFC • SFC transition monitoring check using
SM90 to SM99 and SD90 to SD99
• Periodic execution block function
Periodic sampling trace cannot be used.
Sampling trace (Available when each scan or detailed
conditions are set.)
Interrupt program
Interrupt programs (I0 to I48 and I50 to I255)
(I0 to I48, I50 to I255),
and the fixed scan execution type program
fixed scan execution
are not executable.
type program
Online change
Online change is not executable.
(ladder mode and files)
Table6.37 Restrictions that apply to all the high speed interrupt setting
Restriction When used
"PARAMETER ERROR" is detected.
Availability is checked when parameters are set in GX
Developer.
An error is detected without executing the instruction.
Since interrupt is disabled during instruction execution, high
speed interrupt is not executed at the specified intervals.
Response to instruction search slows down.
Or, a communication error may be detected on the
programming unit.
These functions are ignored without being executed.
Sampling trace is ignored without being executed.
(Trace results may not be read out when reading trace data.)
The high speed interrupt cannot be executed at the specified
intervals during execution of an interrupt program or the fixed
scan execution type program because multiple interrupts are
disabled.
Since interrupts are disabled while writing a file in the RUN
status, the high speed interrupt cannot be executed at the
specified intervals due to delay of the start, and requires the
following time.
• Up to 102 s for online change (ladder mode)
• Up to 300ms for online change (files)
CHAPTER6 FUNCTIONS
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