Siemens SINAMICS CU240S DP-F Operating Instructions Manual page 87

Safe Stop 1 setting
Parameter Description
P9680 = ... SI braking ramp delay
Time [in ms] between selecting the safe braking ramp (SBR) and the
activation of the monitoring ramp. The output frequency is compared
to the frequency of the monitoring ramp when the SBR is active. If the
output frequency exceeds that of the monitoring ramp, an latched safe
torge off (LSTO) is generated. For applications with changing loads,
an increase of P9680/P9880 or P9691/P9891 is recommended. A
larger deviation of the output frequency from the reference is then
acceptable.
Note:
A value of 99000 would deactivate the SBR monitoring, this value
therefore is not allowed. Set P9880 accordingly. The ramping on
selection of SLS or SS1 will however still follow the ramping time in
P9681/P9881.
P9880 = ... SI braking ramp delay
Refer to P9680.
P9681 = ... SI braking ramp-down time
Defines the braking ramp-down time for the dafe braking ramp (SBR)
in seconds. The ramp-down time is used for the SBR and the
monitoring ramp. The total braking time Tx can be derived where fx is
the current frequency according to the following formulas:
a) For activation of the SLS: Tx = P9681 * (fx - P9690)/200 Hz
b) For activation of SS1: Tx = P9681 * (fx - P9682)/200 Hz
Note:
In contrast to other ramping times (e.g. p1120, p1121), the SI braking
ramp-down time is referred to 200 Hz and not to p1082. See formulas
above.
P9881 = ... SI braking ramp-down time
Refer to P9681.
P9682 = ... SI minimum speed for standstill detection
A speed below the threshold of P9682/P9882 is considered as
standstill. If the SS1 has been selected, the safe standstill (STO) will
be activated.
P9882 = ... SI minimum speed for standstill detection
Refer to P9682.
Control Units CU240S
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
Commissioning
5.5 Commissioning using the BOP
Unit Default Min.
ms 250 10
s 0.250 0.010
ms 10000 100
s 10.000 0.100
Hz 5.0 2.0
kHz 0.005 0.002
Max.
99000
99.000
99000
99.000
20.0
0.020
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