Siemens SINAMICS S120 - Page 158

SINAMICS Safety Integrated (Booksize)
Safe standstill (SH)
5-158
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
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 CO/BO: Safety Integrated status (Control Unit)
S r9872 CO/BO: Safety Integrated status (Motor Module)
S r9773 CO/BO: Safety Integrated status (Control Unit + Motor Module)
S r9774 CO/BO: Safety Integrated status (group safe standstill)
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
R_typ
= 2 x r9780 (4 ms) + r0799 (4 ms) = 12 ms
t
R_max
= 4 x r9780 (4 ms) + r0799 (4 ms) = 20 ms
Parameter overview (see List Manual)
S p0799 CU inputs/outputs sampling times
S r9780 Safety Integrated monitoring clock cycle (Control Unit)
S r9880 Safety Integrated monitoring clock cycle (Motor Module)