IDEC SmartRelay functions
IDEC SmartRelay Manual 159
Example 8: Yearly mode on, Monthly mode on, On Time =
2008
–**–01, Off Time = 2010–**–05: Starting in 2008, on the
first day of each month the timer output switches on and
switches off on the fifth day of the month. The timer
continues in this pattern through the last month of 2010.
Functional description
The twelve-month time switch sets and resets th
e output at
specific on and off dates. Sets and resets are executed at
00:00. If your application requires a different time, use a
seven-day time switch together with a twelve-month time
switch in your circuit program.
The on time specifies when the timer is
activated. The off
time
specifies when the output is reset again. For the on and
off times, note the order of the fields: The first field defines
the year, the second the month and the third the day.
If you set the Monthly mode on, the timer
output
switches on
each month at the specified day of the on time and remains
on until the specified day of the off time. The on time
specifies the initial year in which the timer is activated. The
off time defines the last year in which the timer turns off. The
maximum year is 2099.
If you set the Yearly mode on, th
e timer
output switches on
each year at the specified month and day of the on time and
remains on until the specified month and day of the off time.
The on time specifies the initial year in which the timer is
activated. The off time defines the last year in which the timer
turns off. The maximum year is 2099.
If you set Pulse output, the timer
output switche
s on at the
specified on time for one cycle and then the timer output is
reset. You can choose to pulse a timer on a monthly or yearly
basis, or just a single time.
If you set none of the Monthly, Yearly, or Pulse modes on,
you can de
fine a sp
ecific time period with the on time and off
time. It can span any time period that you choose.
For a process action that is to be switched on and off at
multiple but irre
gular times during the year, you can define
multiple twelve-month time switches with the outputs
connected by an OR function block.
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