Samson TROVIS SAFE 3731 Series, Operating Instructions Manual, Page: 25 / 104

EB 8389S EN 25
Statistical information
3.2 Data logger
The data logger records the measured vari-
ables (
valve position x, set point w, set point
deviation e and drive signal y ). The recorded
data are plotted against time in a graph.
Note:
The data logger is interrupted and
must be reactivated when one of the
following events occurs.
− Change of the operating mode
− Air supply failure
− Failure of power sup-
ply of the positioner
− Failure of power supply of the ex-
ternal solenoid valve
3.2.1 Permanent data logging
The measured variables are logged at the
rate defined in 'Scan rate' and saved in a
circular buffer, which holds 100 data points
per measured variable at one time.
Note:
You can read the measured data
logged over the past 24 hours from
the 'Data logger' graph when the
Di-
agnosis folder ( > Statistical informa-
tion > Data logger ) is left open over
this period.
Defining parameters
1. Select 'Permanent' (Selection).
2. Enter scan rate.
3. Start data logger.
 
Fig. 2: Diagnosis > Statistical information > Data logger