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Manual PD4-C (USB)
9 Operating modes
Version: 1.4.1 / 22.07.2016 / FIR-v1626
55
S
p
e
e
d
A
cce
le
ra
ti
o
n
6099
h
:1
4
609A
h
609A
h
6099
h
:2
Index pulse
Reference
switch
Tolerance bands of the limit switches
negative
direction
positive
direction
Tolerance-
zone 2056h
Forbidden
area
Tolerance-
zone 2056h
Forbidden
area
negative limit
switch
Positive limit
switch
reference
switch
The previous image displays the setup of the tolerance areas next to the limit switches:
•
The tolerance zone begins immediately after the limit switch. It is possible to drive free in this area.
The length of the zone can be set in the object 2056
h
.
•
If the controller drives into the forbidden area, it will execute a deceleration with a quick stop ramp
and set an error.
9.5.3 Reference run method
Description
The reference run method is written into object 6098
h
as a number and defines whether referencing
should be performed on a switch flank (rising/falling), a current threshold for block detection or an index
pulse is referenced, or in which direction the reference run should start. Methods that use the index
pulse of the encoder are within the number range 1 to 14, 33 and 34. Methods that do not use the
index-pulse of the encoder are between 17 and 30, but their travel profiles are identical with those of
the methods 1 to 14. These numbers are shown in circles in the following figures. Methods that do not
use a limit switch, and instead travel against a block is to be detected, must be called up with a minus
in front of the method number.
For the following diagrams, the negative movement direction is to the left. The limit switch is located in
front of the mechanical block in each case, and the reference switch (home switch) is between the two