4 commissioning
BU 0630 en-2020 39
• In the event of an incorrect sequence, the following error messages occur:
If the STO safety function is triggered via the Safe Pulse Block while the inverter is being
controlled, the error message E018 (18.0 “Safety circuit”) is issued. If this occurs before the motor
has been stopped, the stopping sequence is discontinued. The connected motor runs down to a
standstill. This behaviour results from the fact that the Safe Pulse Block has the highest priority.
If the inverter is still being controlled after elapse of the “Safety SS1 max. time” (P423), the
error message E018 (18.5 “Safety SS1”) is issued. If this occurs before the motor has been
stopped, the stopping sequence is discontinued. The connected motor runs down to a
standstill.
• If the assessment of the functional safety of the end application shows that monitored starting is
necessary, “Automatic starting” (P428) must not be used (setting “0” Off). This prevents the drive
from re-starting automatically if the requirement for the Safe Pulse Block is removed.