6
FUNCTIONS
6.12 Writing in Program during CPU Module RUN
6.12.3 Precautions for online change
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(2) Operations prohibited during online change, TC setting value change or
data transfer from the program cache memory to the program
memory
Do not execute the following operations during online change, TC setting value
change or data transfer from the program cache memory to the program memory.
(a) Power OFF or reset operationNote31
If power OFF or reset operation is performed during online change, TC setting
value change or data transfer from the program cache memory to the program
memory, the operation does not complete normally.
Execute Write to PLC again if power OFF or reset operation is performed.
(b) Operations from GX Developer
The following operations cannot be executed during online change, TC setting
value change or data transfer from the program cache memory to the program
memory. Execute them after the executing operation is completed.
GX Developer displays an error when executed.
• Online change (Ladder mode, writing files during RUN, and function block)
• TC setting value change
• Data transfer to the program memory
Note31
Since the Basic model QCPU, High Performance model QCPU, Process CPU and Redundant
CPU do not use the program cache memory, it is not necessary to be conscious of data transfer
from the program cache memory to the program memory.
Process
Redundant
Basic
Redundant
Process
Redundant
Note6.30
Basic
Redundant