Functions
8.18 Fail-safe functions
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-131
SLS Mode 2
P9692 = P9892 = 2
Warning
Safe brake ramp not actived
Mode 2 means that the safe brake ramp is not activated, therefore it is the users
responsibility to ensure that the motor is ramped down to or below the SLS setpoint.
In Mode 2, only the monitoring ramp (envelope) is activated, the safe brake ramp will is not
active.
If the motor speed exceeds the upper SLS limit set in P9691 and P9891, the motor must be
ramped down using an external control channel (for example, a PLC, potentiometer or USS
etc.). If the control channel tries to set the speed of the motor to exceed the upper SLS limit,
this will be interpreted as a fault condition and the motor will be stopped and latched. To start
the motor again, the fault condition needs to be explicitly acknowledged. See the following
table.
Fault reactions according the selected SLS mode 2
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