Siemens CU240S DP-F - Page 330

Functions
8.18 Fail-safe functions
Control Units CU240S
8-134 Operating Instructions, 11/2006, A5E00766042B AA
Case 3: SLS monitoring > Frequency setpoint
Initiation of SLS =>
• SLS monitoring activated
• SLS-LED flashing
If frequeny setpoint falls below accuracy limit, an LSTO is triggered
immediately
Deactivation of SLS =>
• SLS monitoring off
• SLS-LED off
• To start again, LSTO must be
acknowledged and a new on command
is necesarry to ramp up to frequency
setpoint.
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