Mitsubishi Electric MELSEC iQ-R Series User Manual page 301

■When the data logging function is executed during the execution of another function
The following table lists the cases when the data logging function is executed during the execution of another function.
Function that has been
already executed
Online change (ladder block)
File batch online change
CPU module data backup function
CPU module data restoration
function
Function specified in the internal
*1
buffer capacity setting
Function not specified in the
internal buffer capacity setting
*1 The data logging function is not included here.
■When a file operation related to the data logging is performed during the execution of the data
logging function
The following table lists the cases when a file operation related to the data logging is performed during the execution of the
data logging function.
Target file
Data logging setting file/common
setting file
Data logging file
Function to be executed
later
Data logging function
File operation
Write/delete
Folder delete
Initialize
Write/delete/folder delete
Initialize
Behavior
■When a step number is specified as the collection start condition or trigger
condition
• The online change (ladder block) is completed.
• The data logging cannot be executed. (An error occurs when the start operation of
the data logging is performed during the online change (ladder block).)
■When a step number is specified as the collection start condition or trigger
condition
• File batch online change is completed.
• The data logging cannot be executed. (An error occurs when the start operation of
the data logging is performed during the file batch online change.)
While the CPU module data backup function is being executed, a logging setting file
cannot be written/deleted or a logging setting cannot be registered/cleared.
While the CPU module data restoration function is being executed, a logging setting
file cannot be written/read/deleted or a logging setting cannot be registered/cleared.
If the internal buffer capacity setting is changed to execute data logging, attempting
to start data logging results in an error. The function already in execution continues to
function normally.
If the internal buffer capacity setting is changed to execute data logging, attempting
to start data logging results in an error. The function already in execution continues to
function normally.
Behavior
During execution of the data logging function, data cannot be written/deleted to/in the
data logging setting file/common setting file being used.
Folders cannot be deleted from the $MELPRJ$ folder in which the data logging
setting files and the common setting file are stored.
During execution of the data logging function, the memory storing the data logging
setting files and the common setting file being used cannot be initialized.
During execution of the data logging function, data cannot be written/deleted to/in or
folders cannot be deleted from the data logging file being used.
During execution of the data logging function, the memory storing the data logging
file being used cannot be initialized.
20.16 Precautions to Take When Using the Data Logging Function
20 DATA LOGGING FUNCTION
20
299