H
OMING
AN
SMD34K
SMD34K User Manual
ADVANCED MICRO CONTROLS INC.
52
Homing Inputs
Up to three physical DC inputs can be used when homing the driver. A Backplane Proximity bit is available in
the network output data that can be used to control when the home input is acted upon. This is typically used
in applications where the home input triggers multiple times in a machine cycle, and the system needs to con-
trol which trigger is acted upon.
Physical Inputs
Home Input:
This input is used to define the actual home position of the machine.
CW Limit Switch Input:
This input is used to prevent overtravel in the clockwise direction.
CCW Limit Switch Input:
This input is used to prevent overtravel in the counter-clockwise direction.
Network Data Input
Backplane_Proximity_Bit:
An SMD34K can be configured to ignore changes on the physical homing
input until the Backplane_Proximity_Bit makes a 0
1 transition. The SMD34K will home on the next
inactive-to-active change on the physical input once this transition occurs. You must program your host
to control the state of this bit.
This bit is disabled by default, and must be activated when you configure the SMD34K before
is can be used. If you decide to activate this bit when you configure the unit and then never set
it to a “1”, the SMD34K will never act on the physical Home Input.
Homing Configurations
A SMD34K must have one of its DC inputs configured as the home input before one of the
CW/CCW Find
Home
commands can be issued.
1) You do not have to configure and use CW or CCW Limits. If you choose to configure the
module this way, then the SMD34K has no way to automatically prevent over travel during
a homing operation. In linear applications, you must prevent over travel by some external
means, or ensure that the homing command is issued in the direction that will result in
reaching the homing input directly.
2) You can use a bit in the Network Output Data (the Backplane_Proximity_Bit) as a home
proximity input. Using this bit is completely optional and prevents the Home Input from
being acted upon until the Backplane_Proximity_Bit makes a 0
1 transition.
Summary of Contents for SMD34K
Page 1: ...MICRO CONTROLS INC ADVANCED U s e r M anual Manual 940 0S280 ...
Page 6: ...TABLE OF CONTENTS SMD34K User Manual ADVANCED MICRO CONTROLS INC 6 Notes ...
Page 50: ...CALCULATING MOVE PROFILES SMD34K User Manual ADVANCED MICRO CONTROLS INC 50 Notes ...
Page 62: ...CONFIGURATION DATA FORMAT SMD34K User Manual ADVANCED MICRO CONTROLS INC 62 Notes ...
Page 80: ...COMMAND DATA FORMAT SMD34K User Manual ADVANCED MICRO CONTROLS INC 80 Notes ...
Page 100: ...LEADERS IN ADVANCED CONTROL PRODUCTS ADVANCED MICRO CONTROLS INC ...