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28 FUNCTIONS
28.15 Data Logging Function
28.15 Data Logging Function
In a redundant system, the data logging function collects data only in the control system regardless of the operation mode.
For details on CPU Module Logging Configuration Tool used for the data logging function in a redundant
system, refer to the following.
Page 945 How to Use CPU Module Logging Configuration Tool
Data logging states
The following table describes each data logging status in the redundant system.
*1 The execution of another function includes:
Execution of data logging with the same trigger conditions (Trigger conditions = Specified conditions)
Auto logging
Online change
Data logging state Description
Stop No data logging settings are registered and data collection is inactive.
Stop (Execute other functions after
completing collection)
Transition from "Collection completed" to "Stop" has occurred due to the execution of another function
*1
.
Stop (Execute other functions after error) Transition from "Error" to "Stop" has occurred due to the execution of another function
*1
.
Waiting RUN Not collected • Data collection has not yet been started because the CPU module is not in the RUN state.
• After the operation mode was switched to the separate mode, the standby system CPU module is waiting for
the transition to the RUN state.
Waiting Start Not Collected Data collection has not yet been started and the CPU module is waiting for the start operation.
Pause Data logging is suspended and data collection has not yet been started.
Waiting to establish collection conditions
Not collected
Waiting for the first collection timing after the start operation
Collecting Continuous logging is active and data collection is being performed.
Waiting trigger Collecting before trigger Trigger logging is active, data collection is being performed, and waiting until the trigger condition is met
After Trigger Collecting Trigger logging is active and data collection is being performed after the trigger condition is met
Collection Completed • Continuous logging: Data collection has finished upon reaching "Number of files to be saved" specified as part
of the "Stop" setting configured in "Operation when the number of files exceeds the set value".
• Trigger logging: Trigger logging has finished collecting data as much as the specified number of records.
Error Data logging has failed due to the occurrence of an error.
Standby system start waiting Data collection has not been performed, waiting for the start operation in the standby system.
Standby system pause Data logging is suspended in the standby system.
Standby system no collection Data logging is started in the standby system, but data collection is inactive.
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