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Application
Hardware
Function
Siemens
Building Technologies
3.4
Pushbutton input (BI Push NO, BI Push NC)
Acquire potential-free button pulses (simple button/dual button).
The process values (event telegrams) are evaluated in the bus master and help to
control:
– Blinds
– Lighting applications
– Other applications controlled by pulses
• The function uses one or two I/O points (simple/dual button).
In case of a dual button, both I/O points must be located next to each other on the
same module pattern.
• Only modules from series D support this function.
I/O status LED
NO Contact (UP)
NO Contact (DOWN)
Function diagram
• The signals are read and debounced on hardware level
• The pulses are interpreted and converted to corresponding events.
The function then sends events at the start, the end, and partially during the pulse
(standard pulse patterns are:
– Short pulse
– Long pulse
– Short double-click
– Short/long double-click
– Long double-click
– Dual click (simultaneous clicking of two buttons)
• The events are sent immediately on the island bus
• A new event prior to sending overwrites a previous event. Exceptions:
– Repeat does not overwrite start
– Heartbeat (due to COVperiod) does not overwrite upcoming events
• The signal operation can be selected: Contact_NO (default), Contact_NC)
TX-I/O™ Module system – Functions and operation
Digital input functions
Process values
Signal Processing
(PBI Event)
(Events)
BUS
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CM110561en_08
2018-10-25
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