5 Commissioning
Linear actuators MC250 • MC253 • MC500 • MC503
Operating Manual
Version 2.1 - March 2011
25
5.7
Set limit position
Select the limit position for the linear actuator using coding switch S7:
•
S7 ON: Limit position with extended spindle nut
•
S7 OFF: Limit position with retracted spindle nut
The limit position is approached in the following situations:
•
In the event of open-circuit detection by the Y signal (only for 2 … 10 V DC or
4 … 20 mA),
•
In the event of a binary signal (circuit is broken between terminals B1 and B2),
•
in Autotest,
•
upon disruption of the power supply (manual adjustment).
5.8
Set potential-free way-switch
Set the two way-switches via trimmer potentiometers P1/P2 independently from
one another. Carry out the specified working steps for each way-switch once.
Proceed as follows to set a way-switch:
1
Ensure that the linear actuator has been started up and initialised.
5.9 Initialise the path-measuring system
ATTENTION
Malfunction due to inaccurately set way-switch!
If the actuator has been set to Manual mode (without power supply), the way-
switch can only be set inaccurately (Centre position of the arm corresponds to the
switching point for approx. 50% lift in this instance).
•
Switch the actuator to Automatic mode in order to set the way-switch
accurately.
2
Move the actuator into a position where a switching event should be triggered.
The following working steps must be carried out with the power supply switched
on.
WARNING
Electric shock due to live components!
Once the power supply has been switched on, there is risk of electric shock due
to live components.
•
Take care not to touch any live components.
•
Take care not to cause a short circuit on a printed circuit board with the tool.