Lenze i750 - Safe Cam (SCA)

Safe cam (SCA)
This funcon monit
ors lower and upper posion limits.
Up to four absolute lower and upper posions limit values can be parameterized and
monitored.
DANGER!
Uncontrolled r
otaon of the motor possible if no safety rated encoder system is used.
Possible consequence: Death or severe injuries
▶
Use a safety rated encoder system to use this funcon.
NOTICE
The funcon has no h
ysteresis.
Possible consequences: The safe output can switch frequently when the speed of the drive is
near the monitoring limit.
Mechanical actuators at the safe output could wear out more quickly due to frequent
switching.
▶
In this case, avoid connuous operaon at the monitoring limit.
Precondions
Homing must be executed. 4Sa
fe homing (SHom) ^ 138
Funconal descripon
t
0
SCA
P
t
0
1
0x28D9:001
0x28D8:001
...
...
0x28D9:004
0x28D8:004
Status
Fig. 25: SCA funcon
The funcon c
ompares the current absolute posion with the parameterized posion limits:
•
Lower posion limit: 0x28D8:001 ... 0x28D8:004
•
Upper posion limit: 0x28D9:001 ... 0x28D9:004
If the actual posion of the drive is within the monitoring limits, the SCA1 within
limits ... SCA4 within limits status is output.
•
St
atus word: 0x2870:002 Bit 12 ... 0x2870:002 Bit15.
Acvaon of the funcon
0x28D8:001 ... 0x28D8:004/0x28D9:001 ... 0x28D9:004 > 0 incr. acv
ates the funcon.
Behavior of the funcon in the event of an error
If the monitoring limits are exceeded, no error message is output and no error stop is
triggered.
Only the SCA1 within limits ... SCA4 within limits status is reset.
Funconal sa
fety
Safety funcons
Safe cam (SCA)
141