During operation
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11.5
Error Status due to System Error
LIMAX Safe SG/SC has a variety of self-diagnostic functions to ensure functional safety.
When the self-diagnostic function detects a defect, the Safe Box sets an error level which is defined for the diag-
nosed defect. The actuator response depends on the respective error level:
Level 1: If the car is moving LIMAX Safe SG/SC ends the travel and changes the error level to level 2 as soon
as standstill is reached.
Level 2: OC will open
Level 3: OC and NOC will open
Level 4: OC, NOC and SGC will open
Once an error level is set it will be stored even after a power-cycle, until a ‘manual error-reset’ is performed.
The characteristics in this regard are the same as with the elevator errors with manual reset. The current error
level is stored in the defect registers (A & B) of Safe Box. The two registers reflect the two channels of the Safe
Box. Additionally, the error-level which was stored at the start-up is stored in these defect registers. If an error
occurs, the technician can view the current error level. For troubleshooting, see chapter
The control should be able to display the current error level, which may be retrieved from
LIMAX Safe SG/SC by CANopen.
In case of an error, a demanded change to teach mode or adjustment mode is not accepted.
11.6
Error Codes
In case of a lift error with manual reset or in case of a defect, a unique error code identifying the specific error is
set in addition to the error level. The error codes are also stored in the defect registers (A and B). Unlike the
error level, they get lost at power down.
It’s the task of the lift control to read all error codes from defect registers A and B which ap-
pear and to log them together with date and time.
If an error occurs, the technician reads all error codes which appeared since last lift operation without error.
The table below gives hints for troubleshooting. If the error affects the lift or the external wiring, LIMAX Safe
SG/SC is not defective and need not be replaced. If the error affects LIMAX Safe SG/SC, the concerned compo-
nent (Safe Box or LIMAX33 RED/LIMAX44 RED sensor) must be replaced. An error reset without replacing the
component is then not allowed.
Table 25: Error codes
Error code
group
Meaning of the
group
Error
codes
Meaning of special errors Error
level
Meaning for technician
0xxh
Lift errors
001h
Over speed (pre tripping) 2
There is no indication that the device is
defective. LIMAX Safe SG/SC can be
kept in operation. There is an error in
the lift. Please observe the hints in
chapter
002h
Unintended car move-
ment
4
003h
Over speed (final trip-
ping)
4
1xxh
Position errors
101h
102h
108h
There are no position
messages from LIMAX33
RED/LIMAX44 RED to
Safe Box
4
Check if LIMAX33 RED/LIMAX44 RED is
connected. If not, switch off the system,
connect LIMAX33 RED/LIMAX44 RED,
do a new start-up and reset the error.
If LIMAX33 RED/LIMAX44 RED was
connected correctly, replace LIMAX33
RED/LIMAX44 RED, start up again and
try to reset the error.
If the error occurs again, replace the
Safe Box.
