Rockwell Automation 1756-HYD02 ControlLogix Hydraulic Servo Module - Manual (Page 62)

62 Publication 1756-UM525A-EN-P - June 2003
Chapter 4 Using the 1756-HYD02 Module Features
Hookup Tab
Use this tab to configure and initiate axis hookup test sequences for the axis.
The table below lists the configurable features available on the Hookup tab.
Return Speed The moving axis’ speed in the return leg(s) of an active homing sequence. The home return speed specified
should be less than the maximum speed and greater than zero.
Feature: Definition:
Feature: Definition:
Test Increment Specifies the distance the axis travels when executing the Output & Feedback test.
Feedback Polarity Polarity of the LDT feedback.
• Positive
• Negative
When you execute either the Feedback Test or the Output & Feedback Test, this field is automatically set:
When properly configured, this setting makes sure that axis Actual Position value increases when the axis is
moved in the user defined positive direction. This feature makes sure that programmatic requests to move in
a positive direction result in positive motion on the axis.
Output Polarity Polarity of the analog output to the drive.
• Positive
• Negative
When you execute the Output & Feedback Test, this field is automatically set:
When properly configured, this setting and the Feedback Polarity setting ensure that, when the axis loop is
closed, it is closed as a negative feedback system and not an unstable positive feedback system. This
feature makes sure that programmatic requests to move in a positive direction result in positive motion on
the axis.
Test Feedback Runs the Feedback Test, which checks and, if necessary, reconfigures the Feedback Polarity setting. When
the test is initiated, you must manually move the axis. If physically moving the axis is too difficult, we
recommend that you combine Test Feedback and Test Output & Feedback features to cause the movement.
Test Output & Feedback Runs the Output & Feedback Test, which checks and, if necessary, reconfigures both the polarity of feedback
(the Feedback Polarity setting) and the polarity of the output to the valve (the Output Polarity setting), for an
axis configured for Servo operation in the General tab of this dialog box.
Executing any test operation automatically saves all changes to axis properties.