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6.12 Writing in Program during CPU Module RUN
6.12.2 File-write in RUN
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FUNCTIONS
(2) Availability of writing a file during RUN
(a) For the High Performance model QCPU, Process CPU, and Redundant CPU
Table 6.24 shows the availability of writing a file during RUN.
* 1: A file cannot be written during RUN if the trailing edge instruction is included in the write program
file when [Trailing edge instructions are not executed] is set in the option menu “instruction
operating setting at writing during RUN” of GX Developer.
However, if a write program is the SFC program, the file can be written during RUN even if the
trailing edge instruction is included in the write program file.
(For the operation of setting [Trailing edge instructions are not executed] in the “instruction
operating setting at writing during RUN” of GX Developer, refer to Section 6.12.3.)
* 2: A program file can be written to the program memory during RUN in the Universal model QCPU.
(b) For the Universal model QCPU
A file can be written during RUN regardless of whether empty area exists enough
to write a program file.
(3) Increase in scan time
The scan time increases when the file is written during RUN.
For increased scan time, refer to Section 11.1.3.
(4) When file is accessed by sequence program instruction
No access can be made from an instruction in a program to the file during online
change.
The instruction to make access to a file during online change will not be executed.
(5) Disabled file-write in RUN from multiple locations
Do not execute file write in RUN simultaneously from multiple locations.
Doing so may erase program file contents.
Table6.29 Availability of writing a file during RUN
Free area greater than the program file to be written
riting a file during RUN
Program memory
Memory card
Yes
No/Yes
Executable
No
Yes
Executable
*1
No
No
Not executable
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