Elgo LIMAX Safe SC, Operating Manual

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During operation
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The periodic
OC
test should be carried out every 24 h. If more than 24 h since last
OC
test have been elapsed,
LIMAX Safe SG/SC informs control that it wants to have a contact test. Control is informed by LIMAX Safe
SG/SC also about if the prerequisites for the contact test are fulfilled or not.
If control is remembered by LIMAX Safe SG/SC that a contact test should be done, control will stop the car at a
floor and keep doors closed. So door circuit should normally be detected as closed by LIMAX Safe SG/SC. Con-
trol now sends LIMAX Safe SG/SC a demand to carry out the
OC
test. After
OC
test is finished, control may feel
free again to open the doors.
If control decides that it is a good moment to do the contact test and the prerequisites are fulfilled, control may
do the contact test to any time, also before 24 h are elapsed.
Communication due to explicit
OC
test will be controlled by the CANopen object 2129h

/CO_SPECS/.
Remark: explicit
OC
Test and relay test may be carried out at the same time. In this case it may be advanta-
geous to control relay test and contact test by PDO (relay test object and contact test object mapped on the
same PDO). For hints for suggested PDO-mapping

/CO_SPECS/.
11.10.3 Implicit OC test
It is supervised:

Whenever
OC
is open, door input must always be detected as open.

If this supervision fails,
OC
is kept open – by error level 2 – until manual RESET.
 NOC
opens additional in order to avoid lift movement
(
OC
is bridged => lift cannot be stopped with
OC
).

But: The
NOC
will close again in recall state.

More information due to recall state see below.

After the bride is removed the error can be reset.
Inspection is treated in a different way:

If a bridged
OC
is detected in inspection no error is set.

Otherwise a man on the roof would be locked in the shaft head when he over-travelled the inspection
limit switch with a bridge on the
OC
.

If a bridged
OC
is detected in inspection and inspection is left,
OC
and
NOC
will be kept open => no
travel outside inspection is possible. If it is switched back to inspection a travel will be possible again.

This situation is reset by the RESET-button or by power cycle. The situation “bridge detected in inspec-
tion” is indicated by CANopen in object 2129h (

/CO_SPECS/).
In Inspection the situation “
OC
bridged” is secured by other means:
NOC
always opens additional to
OC
con-
cerning inspection safety functions.
After a safety function tripped a recall travel will follow in many cases. This applies especially to “final limit
switches”. This is a normal situation and not error should be set.
Therefore control can set LIMAX Safe SG/SC in a “recall state” by CANopen:
In recall state the implicit supervision is disabled. Instead of this a recall-supervision is activated:

The speed is limited to 0.63 m/s
In case speed exceeds 0.63 m/s
NOC
will open.
NOC
will close again if standstill is reached and hold 10 s or if
recall state is left.
If LIMAX Safe SG/SC detects that lift is inspection, it will refuse a demand to go to recall state.
LIMAX Safe SG/SC must receive the demand to go to recall before the recall travel starts. Otherwise an error
will be set. Normally the technician will first turn the recall switch and then – may be 1 s or 2 s after – he would
initiate the recall travel by pushing a direction button. In this case control has enough time to detect the recall
state and send the demand to LIMAX Safe SG/SC.