The safety functions are available in all modes and can communicate with the process using safety-oriented input/output signals. These can be implemented individually for each axis and spindle. The following Safety Integrated functions are available (terms in accordance with IEC 61800-5-2):
Safety Integrated basic functions
- Safe Torque Off (STO)
Prevention of unexpected startup by internal cancellation of the drive pulses. - Safe Brake Control (SBC)
Safe brake control of holding brakes which are operative at zero current, e.g. motor holding brakes. - Safe Stop 1 (SS1)
Safe stopping of the drive with subsequent prevention of unexpected startup (STO).
Extended Safety Integrated functions
- Safe Operating Stop (SOS)
Monitors drives for standstill. The drives remain fully functional for position control. - Safe Stop 2 (SS2)
Safe stopping of the drive with subsequent monitoring for standstill (SOS). - Safely Limited Speed (SLS)
Monitoring of configurable velocity limit values, e.g. during setup. - Safe Speed Monitor (SSM)
Safe checkback signal when a value falls below a settable speed limit, e.g. for enabling a protective door. - Safe Acceleration Monitor (SAM)
Prompt detection of a new axis acceleration during braking (SS1 and SS2).
The Safety Integrated basic functions are license-free. The Extended Safety Integrated functions require a software license in the form of a CNC option per axis with Safety functions.
The Safety Integrated basic functions are controlled via existing terminals on the SINAMICS S120 Combi Power Modules or the SINAMICS S120 Motor Modules in booksize compact format and the SINUMERIK 828D BASIC T/BASIC M. A TM54F Terminal Module is required to control the Extended Safety Integrated functions.
For the formation of the safe control logic, fail-safe 3TK28 or 3RK3 safety relays are recommended. See Catalog SI 10 or Siemens Industry Mall.
http://www.siemens.com/industrymall