Functions
8.18 Fail-safe functions
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-113
Caution
The frequency setpoint can increase related to the following functions
• PID Trim
• Vdc max controller
• Slip compensation
• Resonance damping
• Imax
As the frequency is monitored after adding these values, this increasement should be taken
into account by the user when parameterising the safe frequency envelope.
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*) If PID as trim is active when SS1, SLS0 or SLS1 is triggered, the PID as trim is
deactivated and has no influence to the frequency setpoint at the latest 1 s after the fail-safe
function has been activated.
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