Offset Calibration - Siemens SINAMICS S120 System Manual

Commissioning
4.18 Fine calibration and tuning
4.18.3

Offset calibration

Offset of pressure sensors
Note
Calibration is only possible when pressure sensing is available.
● Condition
The precondition for the offset calibration is that the pressure at all pressure sensors = 0.
● Objective
The pressure display should indicate 0 bar at zero pressure.
● Calibration
– Set p1909.0 = 1
● The particular offset is immediately calibrated when writing to p1909. The associated bit
is automatically reset if the function was executed.
Reference value for pressure sensors
Note
Calibration is only possible when pressure sensing is available.
Enter the characteristic data of the pressure sensors into the datasheet:
● p0240[0...n] pressure sensor A reference value at 10 V
● p0242[0...n] pressure sensor B reference value at 10 V
● p0244[0...n] pressure sensor P reference value at 10 V
Offset of valve control voltage
Objective: Calibration of the electro-hydraulic zero point
Calibration is realized automatically according to the following sequence:
● In the position controlled mode at standstill.
● Set p1910 = 1
● Calibration starts when enabled and is automatically reset to a value of zero after data
identification has been completed.
● This process can take up to 60 s.
● The valve offset is entered in p1832.
110
The offset for the pressure sensors is calibrated. The determined values are
automatically entered into parameter p0241 (pressure sensor A), p0243 (pressure
sensor B) and p0245 (pressure sensor P; system pressure).
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Hydraulic Drive