Lenord, Bauer GEL 8310, Operating Manual, Page: 71 / 226

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4.11 Limit switches
F
UNCTIONAL
D
ESCRIPTIONS
8310/8610-8
−
with 3/71 (»Pos. min«) = 3/72 (»Pos. max«) = 0,
−
with rotary table positioning (refer to section 4.8),
−
during the first calibration process provided that the variant 1 (»n.s.cal«) or 3
(»sec.cal.«) is programmed at storage location 1/2 (power failure security).
4.11.2 Hardware limit switch (option)
The signals of mechanical limit switches can be applied to the Controller via
one of the optional data input modules E
1
... E
3
(GEL 8610: E
4
).
The following signal levels apply:
•
High level
⇒
limit switch has not been activated (drive is within the
admissible range)
•
Low level
⇒
limit switch has been activated (drive is beyond the admissible
range)
Starting from software version 12.00, the switching levels for the
hardware limit switches are inverted (previously release at High level,
now at Low level!).
If therefore, with an existing controller, the software version 11.xx is
replaced by a newer version, any possibly built-in inverter circuits have
to be removed or they now have to be inserted.
If a limit switch is triggered, the Controller reacts as if a software limit switch
has been triggered (refer to the previous section). Furthermore, a
corresponding error message is stored in the error memory (refer to section
6.2, error numbers 28 and 29).
The configuration of the signal inputs is determined via the axis parameter 3/74
(refer to appendix A).
The two signals of any 2 axes can be grouped to one decade. The numbers of
both axes must, however, not be even or odd! This means that the limit switch
signals of the two axes 1 and 2 or 1 and 6 can be grouped together but not
those of axes 1 and 3 (both uneven) or 2 and 4 (both even).
The axis with the odd number must always be connected to the less
significant connections of the decade (2
0
and 2
1
), with the signal for the lower
counting limit (MIN) being connected to 2
0
or 2
2
and the one for the upper
counting limit (MAX) to 2
1
or 2
3
, respectively (refer to the following example).