5. Select the process values you want to record.
6. Click on "Transfer" to write the log settings to the device.
The buffer with the existing logging points is deleted and overwritten with new logging points.
Show trend log
1. Select the menu command "Diagnostics > Trend log".
2. Click on "Read".
– The number of available process values is displayed.
– The current number of logging points per process value that are already in the buffer is
displayed.
– The time stamp for the start time is displayed.
3. To show the first or second process value in the chart, enable the associated check box.
4. Click on "Read".
– The logging points in the buffer are read from the device and shown in the chart.
– The process values for pressure and sensor temperature are shown in different colors in
the chart.
When you click on "Reset", the buffer is deleted and trend logging starts again.
9.3.8.3
Operating hours counter
Operating hours counter for transmitter electronics
● Monitors the number of operating hours during which the transmitter remained in continuous
operation.
● Starts with the first commissioning at the factory.
● The operating hours counter cannot be reset or adjusted.
Operating hours counter for sensor electronics
● Is only displayed when the measuring transducer electronics was replaced.
● Monitors the number of operating hours during which the sensor electronics remained in
continuous operation.
Procedure
1. Use remote operation (e.g. SIMATIC PDM) to select the menu command "Diagnostics >
Device state".
2. Select the "HART status" tab.
The operating time and, if available, the sensor operating time is displayed.
Parameter assignment
9.3 Parameter assignment over remote operation
SITRANS P320/P420 with 4 to 20 mA/HART
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Operating Instructions, 11/2019, A5E44852162-AC