Siemens SINAMICS S120 Installation And Start-Up Manual page 158

SINAMICS Safety Integrated (Booksize)
Safe standstill (SH)
Restart once the "Safe standstill" function has been selected
1. Deselect the function in each monitoring channel via the input terminals.
2. Issue drive enable signals.
3. Cancel the power-on inhibit and switch the drive back on.
– 1/0-edge at input signal "ON/OFF1" (cancel power-on inhibit)
– 0/1-edge at input signal "ON/OFF1" (switch on drive)
4. Run the drives again.
Status with "Safe standstill"
The status of the "Safe standstill (SH)" function is indicated via the following pa-
rameters:
Parameter overview (see List Manual)
S r9772
S r9872
S r9773
S r9774
Response time for "Safe standstill" function
The following values can be specified for the response times when the function is
selected/deselected via input terminals:
S Typical response time
2 x safety monitoring clock cycle CU (r9780) + inputs/outputs sampling time
(p0799)
S Maximum response time that may occur in the event of a fault
4 x safety monitoring clock cycle CU (r9780) + inputs/outputs sampling time
(p0799)
Examples:
Assumption:
Safety monitoring clock cycle CU (r9780) = 4 ms and
inputs/outputs sampling time (r0799) = 4 ms
t = 2 x r9780 (4 ms) + r0799 (4 ms) = 12 ms
R_typ
t = 4 x r9780 (4 ms) + r0799 (4 ms) = 20 ms
R_max
Parameter overview (see List Manual)
S p0799
S r9780
S r9880
5-158
CO/BO: Safety Integrated status (Control Unit)
CO/BO: Safety Integrated status (Motor Module)
CO/BO: Safety Integrated status (Control Unit + Motor Module)
CO/BO: Safety Integrated status (group safe standstill)
CU inputs/outputs sampling times
Safety Integrated monitoring clock cycle (Control Unit)
Safety Integrated monitoring clock cycle (Motor Module)
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
E Siemens AG, 2004. All rights reserved