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(3) Instructions do not operate normally during online change
When data are written to the CPU module in the RUN status, the following instructions do not operate normally.
• Fall instruction
• Rise instruction
• SCJ instruction
(a) Fall instruction
The fall instruction is executed when the instruction is in the data written to the CPU module in the RUN status,
even if the execution condition (on
For preventing the fall instruction execution during online change, refer to POINT in this section.
The corresponding fall instructions are LDF, ANDF, ORF, MEF, PLF, FCALLP, and EFCALLP.
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off) is not met.
Completion of
online change
A
END
0
END
X0 status
ON
XO
OFF
OFF
OFF
ON
MO
OFF
ON
XO
OFF
ON
ON
ON
MO
OFF
ON
XO
OFF
ON
OFF
ON
MO
OFF
Figure 6.53 Operation of the fall instruction
XO
[ PLF MO ]
0
A
END
0
1 scan
The fall instruction is executed
even if the execution condition is off
off.
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