Safety Function Check
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12.12
Setting Error Level 4
LIMAX Safe SG/SC is turned off. All relays open.
Check if the contacts OC, NOC and SGC have opened.
The auditor unplugs the LIMAX33 RED/LIMAX44 RED connector.
LIMAX Safe SG/SC is started up.
To be checked: all contacts stay open.
The query of the current error level in the control, results in level 4.
The LIMAX Safe SG/SC is again switched off and LIMAX33 RED/LIMAX44 RED is reconnected.
LIMAX Safe SG/SC started up.
To be checked: all the contacts stay open.
The query of the current error level in the control still results in level 4.
An error reset is carried out and the query of the current error level in the control results in level “0”.
OC and SGC close. NOC follows the state of the door circuit or the state of door bridging.
12.13
Deceleration Control towards the Shaft End
The control/inverter is adjusted in such a way that the deceleration control is activated towards the end of the
shaft (is adjusted in such a way that the approach to the shaft end will be too fast). The auditor takes a test ride
to the top and also to the bottom so that the deceleration control is activated at both shaft ends.
It must be checked that the cabin comes to a standstill before the positions of the final limit switches.
Note: Since the safety function ‘deceleration control towards the shaft end’ resets itself after a 10 s standstill, it is
advisable to switch off the unit at the main switch shortly after the standstill is achieved. After that the distance to
the respective end floor (top/bottom) is determined. The test is cleared when the cabin has stopped either before
the flush floor position of the end floor or has not over-travelled more than the offset of the relevant final limit
switch (top/bottom), see chapter
12.14
Unintended Car Movement
At the beginning of the test procedure, the cabin is at a floor level and the lift-system is switched free of voltage.
The end of the door circuit is disconnected from the door input of LIMAX Safe SG/SC “DCS-L” and is insulated
to avoid any unintended contact with conductive parts or humans. Now the lift system is started up.
NOC stays open. Now a door bridging message ‘levelling’ for the corresponding floor is sent to LIMAX Safe
SG/SC via CAN; consequently, OC closes. The activation of the door bridging ‘levelling’ allows a movement
with speed up to 0.8 m/s within the door zone. Here, in the case of moving away from a landing, the A3 func-
tion will trigger at a speed of 0.3 m/s. Thus, the worst case can be tested.
A trip is initiated. If the speed exceeds 0.3 m/s the safety function ‘unintended movement’ must be triggered as
LIMAX Safe SG/SC detects open doors due to disconnected door circuit. As soon as the safety function “unin-
tended movement” is triggered, the elevator stops in the following way:
LIMAX Safe SG: through the safety gear (triggered directly or indirectly by speed governor)
LIMAX Safe SC: through A3- safety brake.
After the cabin stops, it has to be checked that the minimum size for the remaining space in compliance with
EN81-20 §5.6.7.5, is respected
After completing the test, the original arrangement of the installation has to be restored. In addition, if the safety
gear has been triggered it has to be reset. The stored error (caused by triggering of “unintended car movement”)
has to be reset by RESET button.
