Operating Instructions

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3.5.13 Group 3.11: Timer functions
The time functions (Time Channels) in the Siemens BT300 give you the possibility to program functions
to be controlled by the internal RTC (Real Time Clock). Practically every function that can be controlled
by a digital input can also be controlled by a Time Channel. Instead of having an external PLC controlling
a digital input you can program the "closed" and "opened" intervals of the input internally.
NOTE: The functions of this parameter group can be made the fullest advantage of only if the battery
has been installed and the Real Time Clock settings have been properly made during the Startup Wizard
(see page 2 and page 3). It is not recommended to use these function without battery backup because
the drive’s time and date settings will be reset at every power down if no battery for the RTC is installed.
Time channels
The on/off logic for the Time channels is configured by assigning Intervals or/and Timers to them. One
Time channel can be controlled by many Intervals or Timers by assigning as many of these as needed
to the Time channel.
Figure 11. The intervals and timers can be assigned to time channels in a flexible way.
Every interval and timer has its own parameter for assigning to a time channel.
Intervals
Every interval is given an "ON Time" and "OFF Time" with parameters. This is the daily time that the
interval will be active during the days set with "From Day" and “To Day” parameters. E.g. the parameter
setting below means that the interval is active from 7 am to 9 am every weekday (Monday to Friday).
The Time Channel to which this Interval is assigned will be seen as a closed "virtual digital input" during
that period.
ON Time: 07:00:00
OFF Time: 09:00:00
From Day: Monday
To Day: Friday
P
9146.emf
AssignToChannel
Interval 1
Interval 2
Interval 3
Interval 4
Timer 1
Timer 2
Timer 3
Interval 5
TimeChannel 1
TimeChannel 2
TimeChannel 3