17
Based on this a signal of 0V is related to an applied voltage of
–20V and +10V is related to
+130V. In closed loop the minimum and maximum values never reaches caused by the closed
loop control reserve.
monwpa,x,1:
Output of a voltage proportional to the actuator position (delivery status).
Shown in diagram 2.
diagram 2
The monitor output provides a voltage signal which correspondents directly to the position of
the piezo actuating system (delivery status). The value of the monitor output voltage range is
from 0V to +10V in closed loop mode and from
–13V to +13V in open loop mode (minimum
and maximum depends of motion range).
monwpa,x,2:
In open loop the monitor provides a voltage signal of 0V up to +10V which
corresponds to the voltage signal applied to the piezo actuator. The monitor output follows the
characteristic curve shown in diagram 1.
In closed loop the monitor output provides a voltage signal which corresponds directly to the
position of the piezo actuating system. Shown in diagram 2.
For amplifiers wi
th “closed loop” operation (“SG” version) in combination with open loop
actuating systems, the monitor output shows a voltage signal proportional to the applied piezo
actuator control signal. The command “monwpa” is deactivated.
8.2.3 Monitor NPC3, NPC120
The monitor output of the NPC3, NPC120 always provides a signal of 0V up to +10V which
directly corresponds to the voltage signal applied to the piezo actuator. The command
„monwpa“ is deactivated.
8.3 Controlling via Interface
The amplifier series NPC and NPCSG can be controlled via RS232 interface. Therefore
signal parameters and information about the actuator position or status can be adjusted or
settled directly. Furthermore, the system settings of the amplifier unit can be changed by
using the interface. A fully PC controlled piezo system for automation purposes is feasible.
Please connect the amplifier system by using the RS232 or the USB interface with your PC.
During this the piezo amplifier must be switched off!
For using the interface a simple Terminal-Program can be used. Please note that the
program “WINDOWS-HyperTerminal” isn’t a part of Microsoft® WINDOWS since
