Siemens SINUMERIK 840D sl Function Manual page 62

Safety Functions integrated in the drive
5.4 Safe Stop 1 (SS1, time-controlled)
Note
So that the drive is able to travel down the OFF3 ramp completely and any motor holding brake
present can be applied before the pulse is switched off, the delay time can be set as follows:
● Motor holding brake parameterized: Delay time p9652 ≥ p1135 + p1228 + p1217
● Motor holding brake not parameterized: Delay time p9652 ≥ p1135 + p1228
● The selection is realized through two channels - however braking along the OFF3 ramp,
only through one channel.
● 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 using parameters p9651 and p9851.
Enabling the SS1 function
The function is enabled using the following parameters:
● SS1 via terminals: By entering the delay time in p9652 and p9852,
Precondition
The "Safe Torque Off" function must be enabled.
To enable the drive to brake to standstill even when selected through one channel, the time
in p9652 must be shorter than the sum of the parameters for the data cross-check (p9650 and
p9658).
The time in p9652 must be dimensioned so that after selection, the drive brakes 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):
● Typical response time
2x safety monitoring clock cycle CU (r9780) + inputs/outputs, sampling time (p0799) + 2
ms
● 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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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated