Elgo LIMAX33 CP-00 SERIES, Owners & Safety Manual

Page: 60 / 92

Safety Functions
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LIMAX33 CP-00 does know the position of the buffers by the lower resp. upper reference position, refer to

11.2.2.
Additional there may be set an offset in der to reduce the (assumed) distance to the buffer. There are two offsets,
one of them for moving up and one for moving down. These two offsets are configuration parameter

14.1.1.
Refer also to

13.2.8.
For decel test mode up when moving up the assumed distance to the buffer is calculated as the distance to the
middle of the shaft. Distance of car to position of this assumptive buffer in the middle of the shaft will be valid
for “decel test mode up” and moving up and for “decel test mode down” and moving down.
For “decel test mode up” and moving down and for “decel test mode down” and moving up, normal calcula-
tions are valid.
In “decel test mode” tripping of ETSL under real conditions can be tested without any risk for the material.
Furthermore, the ETSL-speed depends on fixed configuration parameter

14.1.1 .
These Parameters are:
a = deceleration caused by the machine brake (it must be guaranteed that the average decelera-
tion caused by the machine brake is bigger or at least equal than parameter “a”
t
del
= delay from the moment the safety circuit is opened until the deceleration caused by the machine
brake starts.
V
Buffer
= striking speed the buffers are designed for.
Offset
ETSL_UP
= offset for calculation of distance s in reference to upper reference position the refer to Table 14.
Offset
ETSL_down
= offset for calculation of distance s in reference to lower reference position the refer to Table 14
(meaning of Offset
ETSL_UP,
and Offset
ETSL_dwon,
already mentioned above).
The formula for the permitted ETSL-speed (absolute value) is:
V
ETSL
= MAX (sqrt (2 * a* s + V
Buffer
2 + a 2 * t
del
2 ) – a*t
del
; V
Buffer
) for s >=0
V
Buffer
for s < 0
Table 14 defines how the distance “s” in the formula above is determined.
Table 14: Distance to assumptive buffer dependent on moving direction and mode
Normal mode Decel Test mode up Decel Test mode down
Moving
UP
S = Pos
upper_reference
– Offset
ETSL_up
- Pos
car
S = (Pos
upper_reference
+ Pos
lower_reference
–
Offset
ETSL_up
- Offset
ETSL_down
) / 2 – Pos
car
S = Pos
upper_reference
– Offset
ETSL_up
- Pos
car
Moving
DOWN S = Pos
car
– Pos
lower_reference
- Offset
ETSL_down
S = Pos
car
– Pos
lower_reference
- Offset
ETSL_down
S = Pos
car
-(Pos
upper_reference
+ Pos
lower_reference
– Offset
ETSL_up
- Offset
ETSL_down
) / 2