Siemens SINUMERIK 840D sl Function Manual

Also see for SINAMICS S120: Engineering manual Function manual Engineering manual Manual Function manual

Contents

Safety Functions Integrated in the System/Drive6.4 Safe acceleration monitoring (SBR)05.086-145© Siemens AG 2008 All Rights ReservedSINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 EditionnnxtSTOP B/C initiatednactStopping limit valueSpeed toleranceFig. 6-10 Characteristic of the stopping limit value for SBRCalculating the SBR tolerance of the actual speedThe following applies when parameterizing the SBR tolerance:The possible speed increase after initiating a STOP B/C is obtained from the effec-tive acceleration a and the duration of the acceleration phase. The accelerationphase lasts from one monitoring clock cycle ÜT (delay from detecting a STOP B/Cuntil nset = 0):SBR toleranceActual speed for SBR = acceleration * acceleration durationThe following setting rules apply:For a linear axis:SBR tolerance [mm/min] = a [m/s 2] * ÜT [s] * 1000 [mm/m] * 60 [s/min]For rotary axis/spindle:SBR tolerance [rev/min] = a [rev/s 2] * ÜT [s] * 60 [s/min]The following machine data should be taken into account when determining theacceleration:MD 32300: MAX_AX_ACCELMD 35200: GEAR_STEP_SPEEDCTRL_ACCELMD 35210: GEAR_STEP_POSCTRL_ACCELMD 35410: SPIND_OSCILL_ACCELRecommendation:The value entered for the SBR tolerance should be approx. 20% higher than thecalculated value.