Faulhaber MCDC2805 series, Instruction Manual, Page: 23 / 60

23
Evaluating the Homing Points and Limit Switch
Setting the Edge and Polarity
Example circuit diagrams for the Fault Pin Limit Switch and the
Analog Input are pictured in Diagram 2 and Diagram 5. The
trigger edge and polarity must be chosen depending on how the
limit switch is connected.
Command Function Description Example
HP *) Hard Polarity Sets the trigger edge and polarity. HP3
of the limit switches
1: Rising edge active and logic level to High
0: Falling edge active and logic level to Low
Default Settings: HP7 ... all inputs triggered on the rising edge.
Direct Programming with the HA, HL,
and HN Commands
One can define certain special actions that are triggered at the
homing input with the chosen trigger edge.
■
The programmed limit switch function remains until the chosen
trigger edge is triggered.
■
The programming can be changed with a new command before
triggering at an edge.
■
In the event of a power loss the HA, HL and HN-programming is
erased and all limit switches are inactive.
Command Function Description Example
HA Home When edge triggers, the position is set to 0. HA1
Arming 1: activate
0: deactivate
HL Hard When edge triggers, the motor stops HL3
Limit 1: activate
0: deactivate
HN Hard When edge triggers, the motor HN2
Notify sends a symbol asynch
➔
f
1: activate
0: deactivate
About the HL Command:
Speed Control Mode: Upon triggering, the motor will brake with
the programmed acceleration. That means that it will run out
beyond the homing point. With the command “M” at the end
of a sequence the motor will run out and stop directly at the
reference point.
Advantage: No abrupt changes in motion.
Positioning Mode: Upon triggering, the motor runs to the
homing point at maximum speed and stops.
The HA, HL and HN commands can all be simultaneously active.