Festo SEC-AC-305-CO, Manual

Page: 199 / 272

7. Operating modes/Adjustment of the Operating Mode
7−21
Festo P.BE−SEC−AC−CO−E N en 0802a
Method 34: Homing operation to the current posi
tion
On method 34 the zero position is referred to the current
position.
Method −1: Negative stop evaluating the zero im
pulse
If this method is used the drive moves into negative direction
until it reaches the stop. The servo controller needs ca. 1 sec
ond to identify the stop. The stop has to be mechanically di
mensioned so that it is not damaged in case of the parame
trized maximum current. The zero position refers to the first
zero impulse of the angle encoder in positive direction from
the stop.
Fig.7/12: Homing operation to the negative stop evaluating the zero impulse
Method −2: Positive stop evaluating the zero im
pulse
If this method is used the drive moves into positive direction
until it reaches the stop. The servo controller needs ca. 1 sec
ond to identify the stop. The stop has to be mechanically di
mensioned so that it is not damaged in case of the parame
trized maximum current. The zero position refers to the first
zero impulse of the angle encoder in negative direction from
the stop.