MPH-02, MPB-02, MPD-02
Drive Functions
8-13
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Depending on the home switch signal, there are the following drive
actions when the C0600 homing command is started:
Determined
edge reversal
(bit in S-0-0147)
Signal status of the
home switch
(bit in S-0-0400)
Drive action
positive
0
("not activated")
motion in reference travel direction,
search of positive signal edge
negative
1
("not activated")
motion in reference travel direction,
search of negative signal edge
negative
0
("activated")
motion against the reference travel
direction until signal is "1", then
reversal of motion and search of
negative signal edge
positive
1
("activated")
motion against the reference travel
direction until signal is "0", then
reversal of motion and search of
positive signal edge
Fig. 8-7:
Assigning signal status and edge reversal to drive action when
starting C0600 command (for non-distance-coded measuring
system)
The drive action is completed after detecting the reference position by
shutdown and switching the actual position value to axis reference.
In the case of encoders
with
distance-coded reference marks, only the
status of the home switch signal is monitored by the controller to detect
the end of the travel range. The edge reversal definition doesn’t have any
influence in this case!
Depending on the home switch signal, there are the following drive
actions when the C0600 homing command is started:
Determined
edge reversal
(bit in S-0-0147)
Signal status of
home switch
(bit in S-0-0400)
Drive action
positive or
negative
0
("not activated")
motion for search of dedicated point
in reference travel direction
positive or
negative
1
("activated")
motion for search of dedicated point
against reference travel direction
Fig. 8-8:
Assigning signal status to drive action when starting C0600
command (for distance-coded measuring system)
The drive action is completed after detecting the reference position by
shutdown and switching the actual position value to axis reference.
If several reference mark signals can occur over the travel range of an
axis and a dedicated point is to be determined by one of the marks, a
home switch is required for selecting a reference mark (see fig.
"Recommendation for using a home switch").
Detecting the End of the Travel
Range for Encoders With
Distance-Coded Reference
Marks
Home Switch for Selecting a
Reference Mark
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
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www.cmafh.com
