Eaton Rapid Link RAMO5, Manual

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2 Engineering
2.8 STO function
Rapid Link 5 · RAMO5 · RASP5 10/19 MN034004EN www.eaton.com
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2.8.5 STO function pick-up time
The total pick-up time for the STO function is the time that elapses from the
moment a safety-related event occurs on the system's components (aggre-
gate) to the moment a safe state is reached (in this case: Stop category 0 as
defined in IEC 60204-1):
• The pick-up time from the moment the STO inputs become de-ener-
gized to the moment when the outputs in the power section (U, V, W)
are in a state in which no torque is produced in the motor (STO function
activated) is less than 1 ms.
• The pick-up time from the moment the STO inputs become de-ener-
gized to the moment the STO monitoring status changes is less
than 20 ms.
• The pick-up time from the moment a fault is detected in the STO circuit
to the moment
Sto-F
is signaled is less than 20 ms.
2.8.6 STO function checklist
During normal operation (supply voltage present), there are various options
for monitoring the STO inputs’ state.
If the STO inputs are de-energized, the STO LED does not light up and
InHibt
is displayed in the associated operating unit (Inhibit - German: Lock,
locked state).
If the RASP5 variable frequency drive detects a fault, the corresponding fault
code will be displayed (not:
StoF
) (not:.
Inhibt
).
2.8.7 Error messages
The following table lists the error messages relevant to the STO function,
as well as potential causes and fixes.
Table 8: Error messages
￫
The STO function is always activated and enabled in the RASP5
speed controller - regardless of the operating mode.
Keypad indicator LED display STO Meaning
Inhibit off there is no release
STOP green there is release
Sto-F
- Internal STO fault