Lenze i950

19.11 Safe Direcon (SDI)
The funcon monitors the direcon of rotaon of the motor. A parameterisable tolerance
thr
eshold ensures that the drive does not change the permissible direcon of rotaon. Within
the limits parameterised, the drive can rotate in the impermissible direcon of rotaon.
NOTICE
The delay in 0x28B
A:0020x28BA:002 is parameterised with a value > 0.
Machine parts and parts of the facility can be destroyed if this seng is not taken into consid-
eraon for the calculaon of the safety distance.
▶
Only ulise this funcon if the safety distance has been calculated previously, taking the
delay set into consideraon.
▶
If necessary, the "SDIpos observed" or "SDIneg observed" feedback must be evaluated (via
the safety bus or via a safe output).
WARNING!
A safety-rated encoder system must be used.
Without an enc
oder, this safety funcon cannot be used.
▶
Apply a safety-rated encoder system to use this funcon.
Condions
•
The risk analy
sis must ensure that the delay does not pose any hazard.
•
The applicaon leads the drive to the permissible direcon of rotaon.
Funconal
descripon
t
0
SDIpos
SDIpos observed
STO/SS1/SS2
-n
t
0
SDIneg
SDIneg observed
+n
-n
+n
0x28BA:002
0x28BA:002
0x28BA:003 0x28BA:003
Fig. 76: SDI conguraon modes
For operaon within the limit values, the SDIpos observed (0x28BB:0010x28BB:001) or SDIneg
ob
served (0x28BB:0020x28BB:002) status is set.
The status can
•
be assigned to the safe output (0x28BB:0010x28BB:001 or 0x28BB:0020x28BB:002) or
•
can be reported via the safety bus (0x28B9:0010x28B9:001 or 0x28BB:0020x28B9:002).
Via a safe input, if the corresponding parameter is assigned to the safe input.
Acvaon of the funcon
A data telegram is sent to the inverter via the safety bus. See chapter "Safe network interfa-
ces". ^ 441
For normal operaon, the safe direcon can be set via a safe parameter.
The safe direcon can be combined with the Safely-Limited Speed (SLS) funcon. ^ 412
If the tolerance threshold for the SDIpos or SDIneg direcon set (0x28BA:0020x28BA:003) is
exceeded aer the delay me has elapsed (0x28BA:0030x28BA:002), an error message is trig-
gered and the stop funcon set in 0x28BA:0040x28BA:S004 is acvated.
Safety funcons
Safe Direcon (SDI)
420