4.8.3.2 Homing Offset
A position offset is internally calculated immediately with exiting the homing mode,
thus the same value which is preset in the homing offset also is set in the actual
position (st33 position actual value).
This once calculated value is stored non-volatile in hm09 position offset.
Thus the absolute position (multiturn) can be reset also at power-on along with an
absolute value encoder (singleturn), provided the drive will not be moved in
switched off state.
hm09 position offset can also be written. Thus referencing in other operating
modes is also possible, respectively it is not necessary to change into operating
mode homing. The value in hm09 is also modified by internal functions such as
(e.g.) ps18 and ps19.
4.8.3.3 Digital inputs
The digital inputs can be assigned in any order to the homing functions:
Overview of the function selected by digital inputs
negative limit switch source
Input selection for the negative limit switch
positive limit switch source
Input selection for the positive limit switch
Input selection for the homing switch
Input selection for direct activation of the homing
mode with digital input.
The inputs for the limit switches are 0-active, i.e. value 0 for a limit switch input
means that the drive is located on the limit switch. The homing switch is 1-active.
4.8.3.4 Setpoint speeds and ramps
The setpoint speed to start the homing function is preset with hm02 (CiA 0x6099
[1]) speed during search for switch.
The setpoint speed on driving free of the home switch is set in hm03 (CiA 0x6099
[2]) speed during search for zero.
(CiA 0x6099 [1]) speed during search for
switch
homing speeds [1]
Homing function starts with set-
point speed
(CiA 0x6099 [2]) speed during search for
zero homing speeds [2]
Setpoint speed on driving free
of the home switch
(CiA 0x609A) homing acceleration
homing acceleration [s-2]
Adjustment of the ramps in the
homing mode