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MELSEC-Q
6 HIGH PERFORMANCE MODEL QCPU FILES
(3) Changing Program Files While the High Performance model QCPU
is in the Run Status.
(a) While the High Performance model QCPU is in RUN status,
addition/change/deletion of program files from the standard ROM or
memory card to the program memory can be made by using any of the
following instructions in a sequence program.
• PLOAD (Loading program from memory card)
• PUNLAOD (Unloading program from program memory)
• PSWAP (Load + Unload)
For details on the PLOAD, PUNLAOD and PSWAP instructions, refer to the
QCPU (Q Mode)/QnACPU Programming Manual (Common Instructions).
(b) Even if a program file is changed while the High Performance model QCPU
is in RUN status, the settings specified at the "Program" tab screen the
“(PLC) Parameter" dialog box will remain unchanged. When the High
Performance model QCPU is in STOP status, the settings made at the
"Program" tab screen in the “(PLC) Parameter" dialog box must be adjusted
to any changes (addition, change or deletion of program names) made
when the High Performance model QCPU was in RUN status.
If no adjustment is made at the "Program" tab screen in the “(PLC)
Parameter" dialog box, an error may occur when the High Performance
model QCPU enters into RUN status from STOP status.
(4) Precautions for Executing Programs in the Standard ROM/Memory
Card
(a) For boot run, store parameters (PLC parameters) of the boot file setting in a
standard RAM or memory card. If parameters are stored in a program
memory and a parameter valid drive is set to "Program Memory", the boot file
setting made in the “(PLC) Parameter" dialog box is ignored. As a result, a
boot run is not performed when power is turned on or when the PLC is reset.
(b) If programs are written in the program memory during RUN status while a
boot run is performed from a memory card (RAM), any change made will be
reflected in the programs stored on the memory card (RAM). For details on
the writing of programs during RUN status, see Section 7.10.
(c) If programs are written in the program memory during RUN status while a
boot run is performed from a standard ROM/memory card (ROM), any
change made will not be reflected in the programs stored in the standard
ROM or the memory card (ROM).
(d) At the "Boot file" tab screen in the “(PLC) Parameter" dialog box, set the
maximum number of boot files to the number of files stored in the program
memory. The number of boot files will be decreased by one in the following
cases where:
• A header is specified.
• A PLC parameter in which a boot file setting is maded is booted.
(e) If boot operation is made under the following conditions, it may take
maximum 200 ms for each 1k steps (4kbyte) during boot sequence.
• To boot from an ATA card.
• To boot from standard ROM with an ATA card mounted.
Содержание QCPU (Q Mode)
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