IDEC SmartRelay functions
164 IDEC SmartRelay Manual
4.4.14 Operating hours counter
Short description
A configured time is triggered with a signal at the monitoring
input. The
output is set when this time has expired.
MI = Configured time interval
MN = Time-to-go
OT = Total time expired since the last hi signal at input Ral
These values are always retentive!
Symbol in IDEC
SmartRelay
Wiring Description
Input R A positive edge (0 to 1 transition) at
input R resets output Q and sets a
configured value MI at the counter for
the duration of the time-to-go (MN).
Input En En is the monitoring input. IDEC
SmartRelay scans the on-time of this
input.
Input Ral A positive edge at input Ral (Reset
all) resets the operating hours
counter (OT) and the output, and sets
the time-to-go value (MN) tothe
maintenance interval MI:
• output Q = 0,
• measured operating time OT = 0
and
• the time-to-go of the maintenance
interval MN = MI.
Parameter MI : Maintenance interval to be
preset in units of hours and
minutes
Range of values:
0000...9999 h, 0...59 m
OT : The accumulated total operating
time; you can specify an offset in
hours and minutes
Range of values:
00000...99999 h, 0...59 m
Q
0:
• Whenv ”R” is selected:
Q = 1, if MN = 0;
Q = 0, if R = 1 or Ral = 1
• When ”R+En” is selected:
Q = 1, if MN = 0;
Q = 0, if R = 1 or Ral = 1 or En = 0.
Output Q The output is set when the time-to-go
MN = 0 (see timing diagramm).
The output is reset:
• When ”Q
0:R+En”, if
R = 1 or Ral = 1 or En = 0
• When ”Q
0:R”, if R = 1 or Ral = 1.
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