Lenze ECSCPxxx - Manual (Page 180)

Commissioning
Setting of homing parameters
Setting homing modes
6
l
180 EDBCSXP064 EN 8.0
Modes 2 and 3
Approaching the hardware limit switch, reversing the direction of travel and travelling to
the zero position (zero position of the position encoder) via the reference switch.
)
Note!
ƒ While reversing, the approached hardware limit switch must be assigned
(mechanics must be designed accordingly).
ƒ In a 6 ms cycle, the rising edges of the hardware limit switches are queried.
Ref
1
5
3
R
2
4
6
0
ECSXA511
Fig. 6−35 Homing in mode 2
0 Negative hardware limit switch
1 Zero pulse (zero position of the position encoder)
2 Reference switch
3 Falling edge of the positive hardware limit switch (query in 6 ms cycle)
4 Load (e. g. slide)
5 Direction of travel
6 Home position
The load (e.g. slide) from its initial position is traversed to a hardware limit switch. During
this process, no fault message is actuated. According to the direction of travel, a reversal
takes place at the hardware limit switch approached, and, after leaving the reference
switch, it is traversed to the first zero pulse beyond the reference switch. This zero pulse
bears the home position. If the drive has already approached a hardware limit switch
before homing, the direction of travel is reversed immediately.
In homing modes 2 and 3 the reference switch is found in any case, independent of the
initial position, as in the worst case the entire travel range is executed.