IDEC SmartRelay Manual
173
IDEC SmartRelay functions
4.4 Special functions list - SF
Timing diagram
Functional description
The operating hours counter monitors input En. When En = 1, IDEC SmartRelay computes
the time expired and the time-to-go MN. IDEC SmartRelay shows these times in parameter
assignment mode. Output Q is set when the time-to-go MN = 0.
A signal at reset input R resets output Q and sets the preset value of MI at the counter for the
duration of MN. The operating hours counter OT is not affected.
With a signal at the reset input Ral, you reset output Q and set the preset value of MI at the
counter for the duration of MN. The operating hours counter OT is reset to zero.
Depending on your configuration of parameter Q, the output is either reset with a signal at
input R or Ral ("Q → 0:R"), or when a reset signal is set hi, or the En signal is set lo ("Q →
0:R+En").
Viewing the MI, MN and OT values
• IDEC SmartRelayBasic: You can open the parameter assignment mode when the system
is in RUN to view the actual values of MI, MN and OT.
• IDEC SmartRelay Pure: In WindLGC, you can use the Online Test to read these values.
For further information, see chapter "IDEC SmartRelay software (Page 277)".
• In WindLGC you can get the operating hours counter via the "Tools -> Transfer: Hours
counter" menu command.
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