Precautions To Take When Using The Data Logging Function - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

11.16
Precautions to Take When Using the Data Logging
Function
This section describes precautions to take when using the data logging function.
Mutual exclusion of the data logging function
This section describes the mutual exclusion of the data logging function.
■When another function is executed during the execution of the data logging function
The following table lists the cases when another function is executed during the execution of the data logging function.
Function that has been
already executed
Data logging function
Function to be executed
later
Data logging function
Auto logging
Online change (ladder block)
File batch online change
CPU module data backup function
CPU module data restoration
function
iQ Sensor Solution data backup/
restoration function
Function specified in the internal
*2
buffer capacity setting
Behavior
When the data logging is started using CPU Module Logging Configuration Tool to
the same data logging setting number via another route, the data logging to be
executed later cannot be executed. However, the data logging to be executed later
can be executed to a data logging setting number different from the data logging
setting number currently being executed.
The data conditions cannot be specified as the trigger conditions for multiple trigger
conditions at the same time.
For the execution of multiple data loggings, the data logging settings stored in
different target memory areas cannot be executed at the same time.
The auto logging cannot be executed during the execution of the data logging. (Even
though an SD memory card where the auto logging setting is written is inserted, the
auto logging does not start.)
■When a step number is specified as the collection start condition or trigger
condition
• A data logging error occurs.
• The online change (ladder block) is completed.
■When a label is specified as the collection start condition, data collection target, or
trigger condition
• When the bit of the corresponding setting No. of SD940 (Stop direction at file
change on label specification) is on, changing the global label setting file (when the
global label is specified) or the program file (when the local label is specified) to
files different from the ones at the start operation of data logging causes a data
logging error.
• The online change (ladder block) is completed.
■When a step number is specified as the collection start condition or trigger
condition
• A data logging error occurs.
• File batch online change is completed.
■When a label is specified as the collection start condition, data collection target, or
trigger condition
• When the bit of the corresponding setting No. of SD940 (Stop direction at file
change on label specification) is on, changing the global label setting file (when the
global label is specified) or the program file (when the local label is specified) to
files different from the ones at the start operation of data logging causes a data
logging error.
• File batch online change is completed.
The CPU module data backup function cannot be executed while a logging setting
file is being written/deleted or a logging setting is being registered/cleared.
The CPU module data restoration function cannot be executed while a logging
setting file is being written/read/deleted or a logging setting is being registered/
cleared.
The iQ Sensor Solution data backup/restoration function cannot be executed while a
logging setting file is being written/deleted or a logging setting is being registered/
cleared.
If the internal buffer capacity setting is changed to execute the subsequent function,
attempting to start the subsequent function results in an error. The data logging
continues to function normally.

11.16 Precautions to Take When Using the Data Logging Function

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