8 Adjustment of Internal Settings
48
Version: 2.0.0
PZ166E
E-625 Piezo Servo Controller
NOTICE
Damage of the positioner from oscillations!
Oscillation of the positioner is indicated by humming and this is caused by incorrect adjustment
of the notch filter and/or the P-I controller.
Switch the servo mode off immediately and optimize the notch filter frequency and the P-I
controller settings in the E-625 (p. 43).
Calibrating the displacement of the positioner includes the following steps:
Adjust the sensor range (open-loop operation), (p. 48).
Adjust the static sensor gain (closed-loop operation), (p. 51).
Adjust the sensor linearization (closed-loop operation), (p. 54).
Perform these steps immediately in sequence.
INFORMATION
All positioners ordered together with a E-625 are delivered with measurement protocols as
evidence of the system performance.
INFORMATION
The calibration of the displacement of the positioner applies only to the control mode (analog
or computer-controlled mode) in which the settings were made. In the other control modes,
you must expect a deviation of 1 %.
With E-625 models that can be operated computer-controlled (E-625.CR), PI does the
calibration in the computer-controlled mode by default.
8.6.1
Adjusting the Sensor Range
The sensor range adjustment ensures that the sensor reports the nominal displacement
position (upper travel range limit) when the positioner has reached the nominal displacement.
The adjustment is made in open-loop operation (servo mode OFF).
INFORMATION
The piezo voltage required to deflect the positioner to the upper travel range limit is not
exactly 100 V but lies in the range of 85 to 105 V.
