Siemens SIMATIC S7-1500 System Manual page 239

SIMATIC memory card
12.3 Data transfer with SIMATIC memory cards
Storing CPU trace recordings on the SIMATIC Memory Card
The "Save measurements on device (memory card)" function allows you to save CPU trace
recordings on the SIMATIC Memory Card.
1. Select "Traces" -> "Trace" in the project tree.
2. In the working area, select "Configuration" -> "Recording conditions" -> "Measurements in
device (memory card)".
Response when number reached
The "Deactivate recording" parameter value repeats the measurements until the configured
"Number of measurements" is reached.
The "Overwrite oldest recording" parameter value replaces the oldest measurement with the
latest measurement when the configured "Number of measurements" is reached. Please
note, however, that continuously writing data to the SIMATIC Memory Card shortens its
service life.
Figure 12-2 Dialog with settings for saving measurements to the memory card in STEP 7
Number of measurements
The CPU supports a maximum of 999 measurements. The CPU writes the Trace recordings
to the load memory of the memory card. Meanwhile, the CPU pauses the checking of trigger
conditions for the Trace job. Once the CPU has finished saving the Trace recordings, the
CPU continues checking the trigger conditions.
NOTICE
Memory required on the SIMATIC Memory Card
If the Trace function "Measurements on device (memory card)" requires more memory than
is available on the SIMATIC Memory Card, this can have undesirable effects. Ensure there
is always sufficient free memory space to use the "Measurements on device (memory
card)" function.
In addition to the "Measurements on device (memory card)" Trace function, other functions,
such as storing data logs, use memory space on the SIMATIC Memory Card. Make sure
that enough memory space is available for all functions that occupy memory.
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SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA