Siemens SINUMERIK 840D sl Function Manual page 54

Safety Functions Integrated in the Drive
4.1 General information about SINAMICS Safety Integrated
If this expected response in a monitoring channel is not fulfilled, the drive coasts to
a standstill (two channel) and an appropriate message is output.
Shutdown paths
Two independent switch–off signal paths are available. All switch–off signal paths
are low active, Thereby ensuring that the system is always switched to a safe sta-
tus if a component fails or in the event of cable breakage.
If an error is discovered in the shutdown paths, the "safe standstill" (Safe Torque
Off) function is activated and a system restart inhibited.
Monitoring cycle
The safety–related drive functions are executed cyclically in the monitoring cycle.
The safety monitoring clock cycle is a minimum of 4 ms. Increasing the basis
DRIVE–CLiQ sampling time (p0110) also increases the safety monitoring clock
cycle.
Parameter overview (refer to SINAMICS S List Manual)
S r9780 SI monitoring clock cycle (Control Unit)
S r9880 SI monitoring clock cycle (Motor Module)
Crosswise data comparison
A cyclic crosswise comparison of the safety–related data in the two monitoring
channels is carried out.
In the event of inconsistencies, the following occurs:
1. Fault F01611 or F30611 (STOP F) is output and the time in p9658 or p9858
initiated.
2. Once the time has elapsed, a further fault (F01600 or F30600 (STOP A)) is
output and the pulses are safely cancelled.
The stop response is transferred to the other monitoring channel so that two–chan-
nel stopping can be carried out.
Detailed information on the stop responses, see Chapter 6.3 "Safe Stops A–F".
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
© Siemens AG 2008 All Rights Reserved
05.08