Posion-dependent sa
fe speed (PDSS)
This funcon monitors the speed of a drive as a funcon of the absolute posion along a
moon range.
This enables the use of a physically limited moon range without the use of mechanical
buers and limit switches.
The funcon can be parameterized as permanently acve.
DANGER!
Uncontrolled r
otaon 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 funcon.
The distance of the posion limit (0x28DE:002) t
o the forbidden zone must be
selected so large, taking into account all parameterized tolerances, that the
drive cannot collide with the forbidden zone under any circumstances.
Precondions
Homing must be executed. 4Sa
fe homing (SHom) ^ 138
Funconal descripon
Prohibited zoneProhibited zone
0x28DE:002 0x28DE:003
0x28DE:004 0x28DE:005
0x28DE:008
v
PDSS PDSS
s
Fig. 23: PDSS funcon
Funconal sa
fety
Safety funcons
Posion-dependent safe speed (PDSS)
136