Functions
10.2 Retentive memory NVRAM
CPU 1515SP PC2 (F/T/TF)
Operating Instructions, 09/2018, A5E42603425-AA
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10.1.2
Temperature monitoring
Three temperature sensors monitor the temperature at different locations of the
CPU 1515SP PC2:
●
Processor temperature
●
Temperature in the vicinity of the RAM ICs/blocks
●
Temperature of the basic module
If one of the temperature values exceeds the set temperature threshold, the temperature
monitoring triggers a temperature error. The temperature error activates the IPC DiagBase
and/or IPC DiagMonitor software.
The temperature error remains stored until the temperatures fall below the temperature
threshold again and it is reset using one of the following measures:
●
Acknowledgment of the error message by the monitoring software
●
Restart of the device
10.1.3
Monitoring drives
The S.M.A.R.T. function is a monitoring function of storage media. With this function,
different parameters are queried in order to detect possible defects at an early stage. This
information is shown to the user with corresponding software.
10.1.4
Operating hours counter
You can use an operating hours counter for a variety of applications:
●
For calculating the operating time of the CPU
●
For calculating the operating time of controlled equipment
You can find more information about the operating hours counter in the "Operating hours
counter" group in the "Diagnostics" folder of the Online and Diagnostics view in the TIA
Portal.
10.2
Retentive memory NVRAM
Retentive memory is non-volatile memory for saving a limited quantity of data in the event of
power failure.
The data defined as retentive is stored in retentive memory. This data is retained beyond a
power-off or power failure.
A corresponding function is implemented in the S7-1500 software controller to allow NVRAM
to be used there. This saves up to 410 KB of data in non-volatile data memory in the case of
power failure. This function can be set on the engineering station in the TIA Portal.
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