Siemens Sinumerik 840D sl Function Manual page 64

Safety Functions integrated in the drive
4.4 Safe Stop 1 (SS1, time controlled)
S The signals of the components connected at the terminals (e.g. pushbuttons,
switches, ...) can be debounced in order to prevent false tripping due to signal
disturbances. The filter times are set via parameters p9651 and p9851.
Enabling the SS1 function
The function is enabled using the following parameters:
S SS1 via terminals:
-- By entering the delay time in p9652 and p9852,
Precondition
The Safe Torque Off function must be enabled.
In order that the drive can brake down to a standstill even when selected through
one channel, the time in p9652 must be shorter than the sum of the parameters for
the crosswise data comparison (p9650 and p9658).
The time in p9652 must be dimensioned so that after selection, the drive brakes
down to a standstill.
Status for Safe Stop 1
The status of the Safe Stop 1 function is displayed using parameters r9772, r9872,
r9773 and r9774.
As an alternative, the status of the function can be displayed using the configurable
message N01621 (configured using p2118 and p2119).
Response time for the Safe Stop 1 function (SS1)
The following values can be specified for the selection (up until braking is initiated):
S Typical response time
2x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time
(p0799) + 2 ms
S Maximum response time that can occur when a fault develops
4x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time
(p0799) + 2 ms
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
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