Manualshelf

Technical data

ManualsBrandsSiemens ManualsHobEH.85M.21E
381382383384385386387388389390
Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
380 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
8.5.6.2 Safely Limited Speed without encoder
Functions
Two different encoderless Safely Limited Speed monitoring functions can be set with the
parameters p9506/9306:
● p9506/9306 = 3: Safe monitoring of acceleration (SAM) / delay time
The function is identical to "Safely Limited Speed with encoder", which was described in
the previous section.
● p9506/9306 = 1: Safe brake ramp monitoring (SBR)
Monitoring the brake ramp
● If SLS is selected or switched to a lower SLS stage, and at the same time if the setpoint
speed limiting is configured (e.g. in a higher-level control, which evaluates the Safety
information channel or wiring from r9733[0/1] to the ramp-function generator speed limits
(p1051/p1052)), then the motor is a braked with the OFF3 ramp from the actual speed to
below the selected SLS limit value.
● Parameters p9582/p9382 are used to set the delay time for the brake ramp monitoring.
● Monitoring of the brake ramp is activated once the delay time in p9582/p9382 has
elapsed. If the actual speed of the drive violates the brake ramp (SBR) during braking,
Safety messages C01706 and C30706 are output and the drive is stopped with STOP A.
● The newly selected SLS limit value is also taken over as the new limit speed, if either
– the SBR ramp has reached the new SLS limit value, or
– the actual speed of the drive was below the new SLS limit value for at least the time
set in p9582/p9382.
● The function "Safely Limited Speed without encoder" then monitors whether the actual
speed remains below the newly selected SLS limit value.
● The parameterized stop response (p9563[x]) is triggered if the SLS limit value is
exceeded.
Configuring the limits
● The speed limits for Safely Limited Speed without encoder are configured in exactly the
same way as described for Safely Limited Speed with encoder.
● Only STOP A and STOP B may be configured as stop responses for "Safely Limited
Speed" (SLS) without encoder.