Commissioning
Setting of homing parameters
Homing modes
6
151
EDBCSXM064 EN 11.0
Modes 12 and 13
Approaching the hardware limit switch, reversing and travelling to the zero pulse (zero
position of the position encoder).
Note!
ƒ While reversing, the approached hardware limit switch must be assigned
(mechanics must be designed accordingly).
ƒ In a 6 ms cycle, the negative/positive hardware limit switches are queried.
1
5
3
R
2
4
0
ECSXA516
Fig. 6−22 Homing in mode 12
Negative hardware limit switch
Zero pulse (zero position of the position encoder)
Positive hardware limit switch
Load (e. g. slide)
Home position
Direction of travel
Zero pulse and hardware limit switch are used if a reference switch and touch probe sensor
are not available (e.g. in case of rotary tables).
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 the load travels to the first zero
pulse (zero position of the position encoder) after leaving the limit switch. This zero pulse
bears the home position. If the drive has already approached the hardware limit switch
before homing, the direction of travel is reversed immediately.
Settings
Mode 12
(Homing towards the positive hardware limit switch)
Mode 13
(Homing towards the negative hardware limit switch)
l Set C0540 = 12. l Set C3010 = 13.
Note!
ƒ Single−turn absolute value encoder (SinCos encoder) and resolver do not
have a zero pulse. Here the zero position corresponds to the zero pulse.
ƒ In case of multi−turn absolute value encoders, only the homing modes
6 ... 11 and 99 can be used (C3010 = 6 ... 11 or 99).
ƒ If the digital frequency output (X8) is to be used as encoder simulation with
zero pulse, set C0540=2.
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