Rockwell Automation 1756-HYD02 ControlLogix Hydraulic Servo Module - Manual (Page 61)

Publication 1756-UM525A-EN-P - June 2003 61
Using the 1756-HYD02 Module Features Chapter 4
Active Home
Sequence Group:
Direction For active homing sequences, except for the Immediate Sequence type, select the desired homing direction:
• Forward Bi-directional - The following events occur:
a. The axis moves forward at the rate specified in the Speed field until a homing event occurs (i.e. a switch
turns ON).
b. When the switch turns ON, the axis reverses its direction at the rate specified in the Return Speed field
until the switch turns OFF.
c. If an Offset value is specified, the axis continues in reverse for the corresponding distance.
When the axis stops moving, it is in the Home Position. The graphic below shows this sequence.
• Forward Uni-directional – The following events occur:
a. The axis moves forward at the rate specified in the Speed field until a homing event occurs (i.e. a switch
turns ON).
b. When the switch turns ON, the axis continues forward at the rate specified in the Return Speed field until
the switch turns OFF.
c. If an Offset value is specified, the axis continues forward the corresponding distance.
When the axis stops moving, it is in the Home Position.
• Reverse Bi-directional – The following events occur:
a. The axis moves in reverse at the rate specified in the Speed field until a homing event occurs (i.e. a switch
turns ON).
b. When the switch turns ON, the axis moves forward at the rate specified in the Return Speed field until the
switch turns OFF.
c. If an Offset value is specified, the axis continues moving forward the corresponding distance.
When the axis stops moving, it is in the Home Position.
• Reverse Uni-directional – The following events occur:
a. The axis moves in reverse at the rate specified in the Speed field until a homing event occurs (i.e. a switch
turns ON).
b. When the switch turns ON, the axis continues in reverse at the rate specified in the Return Speed field until
the switch turns OFF.
c. If an Offset value is specified, the axis continues in reverse the corresponding distance.
When the axis stops moving, it is in the Home Position.
Speed The moving axis’ speed used in the first leg of an active homing sequence. The homing speed specified should be
less than the maximum speed and greater than zero.
Feature: Definition:
Step A – Speed
Step B –
Return
Speed
Step C –
Offset
Switch ON
Switch OFF
Home Position