MTS Series 793 - Manual (Page 227)

Description Item
Preamp Output—The raw AC input from the spool LVDT.
Conditioner Out—Conditioned feedback signal from the servovalve’s
inner loop displacement sensor.
Voltage Reference (5V) —Internal board reference test only.
On FlexTest 40, 60, 100, and 200 controllers, monitors signals from
the Model 494.16 VD/DUC through the Model 494.40 I/O Carrier card’s
Service connector. Service Port Output (Model 494.16
VD/DUC only)
Select a signal to monitor:
Valve Current 1—Final output current to the servovalve expressed in
voltage. The current-to-voltage relationship is 5 V DC = 50 mA, The
maximum valve current depends on the .hwi Range setting for the
valve driver.
Valve Current 2—Final output current to the servovalve expressed in
voltage. The current-to-voltage relationship is 5 V DC = 50 mA, The
maximum valve current depends on the .hwi Range setting for the
valve driver.
Inner Loop Command (firmware generated)—Input signal to the
three-stage valve driver which is used by the inner-loop controller.
Spool Position (firmware generated)—The spool position signal used
by the inner-loop controller.
Inner Loop Error (firmware generated)—Error signal of the inner-loop
controller.
Sumamp Output—A slightly attenuated, inverted version of the preamp
output signal. In some custom applications, the preamp output signal
may be summed with an external signal.
Preamp Output—(transducer output) x (preamp gain).
A/D Input—Conditioned feedback signal from the DUC portion of the
Model 494.16.
+Ex Voltage—The + excitation voltage delivered to the transducer.
These service port selections are saved with the parameter set.
Each mezzanine card connector on a Model 494.40 I/O Carrier board
includes an LED that you can switch on and off. Select the check box LED State (Series 494 Hardware
only)
to switch the LED on. Click to clear the check box to switch the LED
off.
On FlexTest IIm controllers, monitors signals through the Model
497.15’s front panel tip jacks. Monitor Mux Output (FlexTest IIm
and FlexTest CTC controllers)
Select an inner loop signal to monitor:
Valve Current—Final output to the servovalve expressed in voltage.
The relationship of current-to-voltage is 10 V DC = 50 mA.
Valve Balance—Amount of valve balance command applied by the
Valve tab’s Valve Balance control.
Inner Loop Command—Input signal to the three-stage valve driver.
MTS Series 793 Control Software 227
Station Setup