Tightening
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6.5.3.1 Fail Safe Torque
Parameters: Torque
Function: Supervises the fail-safe limits for Torque, The fail safe limits are active also during the
step overshoot time.
The absolute value of the measured torque must be lower than the fail-safe torque limit
during the entire step, including the post step check time. Note! The torque restriction is
supervised also during the Torque Spike Elimination phase.
Diagram:
Angle
Torque
FsTorque Fail safe torque Angle Fail safe angle
FsTime Fail safe time
Step
FsTorque
FsTime
(time)
FsAngle
Alarms: Torque restriction (TR)
Trace: Torque is shown as a horizontal line from step start to step stop in trace when Torque vs.
Time is selected. Fail safe limits parameters must be enabled in the trace form (see
View of trace curves).
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