MTS Series 793 - Manual (Page 224)

This tab displays editable servovalve drive signal parameters for each control channel based on the type of
valve driver used by a channel.
Note:
To edit any item requires Tuning access level (or higher).
Drive Panel Settings—Two-Stage Valves
This panel configures control channel drive signals for two-stage valve drivers. The panel controls vary with
the type of valve driver used.
Access
Station Setup window > navigation pane > Channels > Control Channel n >
Note:
Editing requires Tuning access level (or higher).
Drive Panel Settings for Two-Stage Valve Drivers
Description Item
Displays the valve driver’s full minimum and maximum output values. Fullscale Min/Max
Sets the polarity of the valve drive signal to Normal or Invert. Polarity
The Polarity cannot be changed when station pressure is on.
Compensates for minor mechanical imbalances in the servovalve. Valve Balance
A second Valve Balance displays if you have dual valves. For more
information, see “How to Balance Dual Valves” in the MTS Series 793
Tuning and Calibration manual.
Adjusts the amplitude of the dither signal. Dither Amplitude
For Model 493.14 Valve Drivers—Adjusts the dither signal frequency. Dither Frequency
Specifies the ratio between the two unequal surface areas of a
single-ended actuator piston (double-ended actuators have equal-area Output Delta-K
(also known as Piston Area Ratio)
piston surfaces). This ratio is used to scale the valve drive signal so
it is the same for positive and negative commands of the same
magnitude.
The actuator piston parameter is set as a direct ratio. For example, if
you know that the area ratio between the two piston ends in 1:1, set
the parameter to 1. If you know the area ratio is 2:1, set the parameter
to 2, and so on.
Select to turn on and set the output limits. Output Limit Enable
Each mezzanine card connector on a Model 494.40 I/O Carrier Board
includes an LED that you can switch on and off using the LED State LED State (Series 494 Hardware
only)
check box. Select the check box to switch the LED on. Click to clear
the check box to switch the LED off.
224 MTS Series 793 Control Software
Station Setup