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

20.16
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 where another function is executed during the execution of the data logging function.
Function that has been
already executed
Data logging function
Auto logging
*1 The data logging function is being executed in the following states where the data logging status remains intact or when the save status
is "Saving".
 RUN waiting (no collection)
 Condition waiting (no collection)
 Start waiting (no collection)
 Pause
 Collecting
 Trigger waiting (Collecting before trigger)
 Collecting after trigger
In the states other than the above, although the functions can be executed, the registration of the data logging setting executed first is
canceled when the data logging function or another function is executed.
*2 The data logging function is not included here.
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20.16 Precautions to Take When Using the 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
Function specified in the internal
*2
buffer capacity setting
Function not specified in the
internal buffer capacity setting
Data logging function
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 step number is specified as the collection start condition or trigger condition
• A data logging error occurs.
• 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.
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.
If the condition "Total capacity that is set in the internal buffer capacity setting + Internal
buffer capacity that is set in other than the internal buffer capacity setting > 3072K bytes"
is satisfied, attempting to start the subsequent function results in an error. The data
logging continues to function normally.
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.
• Another data logging cannot be executed during the execution of the auto logging.
• Even if data logging is started by using CPU Module Logging Configuration Tool,
another data logging cannot be executed until the SD memory card with the auto
logging setting is removed.
* 1