8.9.2 Fault ResetTo reset faults, change bit 7 of the controlword from 0 to 1. See the VLT® Servo Drive System ISD 510, DSD 510, MSD 510Programming Guide for further information.8.10 Functional Safety Characteristic DataTable 33: Functional Safety Characteristic DataData PSM 510 SDM 511 SDM 512 DAM 510General informationResponse time (from switching on the input until torque generation isdisabled)<100 msLifetime 20 yearsData for EN/ISO 13849-1Performance level (PL) – d d –Category – 3 3 –Mean time to dangerous failure (MTTFD) – >5000 years >5000 years (1) –Diagnostic coverage (DC) – 60% 60% –Data for EN/ISO 61508 and EN/IEC 62061Safety integrity level (SIL) – 2 2 –Probability of failure per hour (PFH) 0 /h <4 x 10-9/h <4 x 10-9/h 0 /hSafe failure fraction (SFF) 100% >95% >95% 100%Subsystem classification Type AFunctional test interval 1 year1 For each axis.N O T I C E- The PSM 510, DAM 510, and ACM 510 do not contribute to the dangerous failure rate of the Danfoss system and cantherefore be excluded from safety-related calculations.8.11 Maintenance, Security, and User AccessibilityMaintenance: Test the STO safety function at least once per year as follows:• Remove the STO input voltage.• Verify that the motors stop running.• Verify that no unexpected error codes appear.Security: If security risks exist, take suitable measures to prevent them.Functional Safety ConceptOperating Guide | VLT® Multiaxis Servo Drive MSD 510 SystemAQ262450196490en-000101 / 175R1170| 161Danfoss A/S © 2019.10
