8 Adjustment of Internal Settings
E-625 Piezo Servo Controller
PZ166E
Version: 2.0.0
41
8.3.3
Potentiometers
Potentiometers to adapt settings are located in the following places (p. 37):
R143 for the sensor gain: Main board
R144 for the linearization (ILS): Main board
Potentiometers for setting the notch filter (P4) and the P-I controller (P2, P3): E-802
servo controller submodule (refer to the user manual for the servo controller
submodule)
8.3.4
E-802 Servo Controller Submodule
The E-802 servo controller submodule has the slew rate limiter, the notch filter, and the servo
loop.
In closed-loop operation, the servo loop of the E-802 servo controller submodule determines
the piezo voltage on the basis of the target position and the feedback from the position sensor
in the positioner. This uses an analog proportional integral (P-I) algorithm.
The E-802 servo controller submodule is explained in detail in a separate user manual.
8.4
Synchronizing the Sensors
The sensors can be synchronized in systems with several capacitive sensors. For this, the
master/slave switch configures one system as the sensor master. The other systems are set as
slaves.
Switch in master position (default settings): The excitation frequency of the sensors is
provided internally.
Switch in slave position: The excitation frequency of the sensors is provided externally.
The master/slave switch is located on the printed circuit board which is soldered (p. 40)
vertically on the main board.
Furthermore, for all E-625.CR to be synchronized, wires 7 and 8 as well as a ground wire (1, 2, or
5) of the
Network
socket must be connected to the corresponding wire.
INFORMATION
Several E-625.CR can be networked together and commanded from one single RS-232 or USB
interface on the PC. In this case, all sensors must be synchronized. Using E-625.CN network
cables from PI ensures the necessary connection of the wires 7, 8 and a ground wire, for details
see the pin assignment of the cable (p. 73).
