Siemens CU240S DP-F - Page 317

Functions
8.18 Fail-safe functions
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-121
Case 4: accuracy limit > Frequency setpoint
Initiation of SLS =>
• Ramp monitoring activated
• STO activated
• SLS-LED flashing
• ES-LED on
• Frequency setpoint deactivated
Deactivation of SLS =>
• Ramp monitoring off
• Frequency setpoint activated
• SLS monitoring off
• SLS-LED on
• ES-LED off
To start again, STO must be acknowledged and a new on command is
necesarry to ramp up to frequency setpoint.
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