Parker LVD1 - Page 60

Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
60
Homing function
The homing function, which is available exclusively with operating modes 9, 10, 11, 13
and 15, provides a typical axis reset procedure. Before using the homing function perform the
following settings:
- connect the homing sensor to digital input 7
- set the homing speed in parameter Pr4 (pay attention to the direction of rotation)
- set Pr5 = 0, b40.12=1, b40.13=0, b40.2=0.
To activate the homing procedure set b94.12=1 for a type 1 reset, or b94.13=1 for a type 2
reset. When the homing procedure is concluded the respective activation bit will be reset. If
you wish to abort the procedure, reset the command bit, stop the motor (e.g. by resetting Pr5)
and, if necessary, read b40.2 which will remain on zero.
RESET TYPE 1 - DESCRIPTION
When the procedure is activated (b94.12=1) the axis is brought to the speed programmed in
Pr4 (Pr5=Pr4); the axis is then brought to zero speed (Pr5=0) on the positive front of the
homing sensor signal; after 150ms with the motor stopped parameters Pr61:60 and Pr63:62
are reset, the position loop is enabled by setting b40.2=1, and command b94.12 is reset. The
homing sensor signal must be maintained active in high status for the entire duration of the
motor stopping phase.
If the homing sensor is already engaged when the procedure is activated, the axis moves at
the speed programmed in Pr4 but in the opposite direction until the homing sensor is freed; At
this point the procedure continues as described above.
RESET TYPE 2 - DESCRIPTION
When the procedure is activated (b94.13=1) the axis is brought to the speed programmed in
Pr4 (Pr5=Pr4); the axis is then brought to zero speed (Pr5=0) on the positive front of the
homing sensor signal; after 150ms with the motor stopped parameters Pr61:60 and Pr63:62
are programmed with the value of parameter Pr28, the position loop is enabled by setting
b40.2=1, and command b94.13 is reset. The homing sensor signal must be maintained active
in high status for the entire duration of the motor stopping phase.
If the homing sensor is already engaged when the procedure is activated, the axis moves at
the speed programmed in Pr4 but in the opposite direction until the homing sensor is freed; At
this point the procedure continues as described above.
Rapid download of an operating mode
The parameter values of a given operating mode can be set in the table and then instantly
downloaded on transmission of an appropriate command: by setting b94.14 to 1 the elements
of the table selected by Pr43 will be copied into parameters Pr50...Pb70 thereby activating a
new operating mode. When the operation is terminated b94.14 is reset automatically.
The table must be set up as shown below.