H1: Manual and handwheel travel
3.5 Handwheel override in automatic mode
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
171
Distinction
Depending on the programmed feedrate, a distinction is made between the following for
handwheel override:
● Path definition
Axis feedrate = 0 (FDA = 0)
● Velocity override
Axis feedrate > 0 (FD or FDA > 0)
The table below shows which axis types can be influenced by the "handwheel override in
automatic mode" function.
Axes that can be influenced by the "handwheel override in automatic mode" function
Axis type Velocity override Path definition
Positioning axis FDA[AXi] > 0 ;
acts axially
FDA[AXi] = 0
Concurrent
positioning axis
Parameter "Handwheel override active" = 1 and
axis feedrate > 0 from FC18
Parameter "Handwheel
override active" = 1 and axis
feedrate = 0 from FC18
Path axis FD > 0 ;
acts on path velocity
Not possible
Path definition
With axis feedrate = 0 (e.g. FDA[AXi] = 0), the traversing movement of the positioning axis
towards the programmed target position is controlled entirely by the user rotating the
assigned handwheel.
The direction in which the handwheel is turned determines the traversing direction of the
axis. The programmed target position cannot be exceeded during handwheel override. The
axis can also be moved toward the programmed target position from the opposite direction,
whereby the movement is only restricted by the axial position limitations.
A block change occurs when:
● The axis has reached the programmed target position
or
● The distance-to-go is deleted by axial interface signal
DB31, ... DBX2.2 (delete distance-to-go).
From this moment on, the path default is deactivated and any further handwheel pulses have
no effect.
After this, incrementally programmed positions refer to the point of interruption and not to the
last programmed position.
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