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Application
Hardware
Function
UP
DOWN2
DOWN1
Relay outputs
Actuators with 2 end
switches
Actuators with 3 end
switches
Siemens
Building Technologies
5.11
Blinds control (BO Blinds Relay)
Control any kind of blinds.
– Without louvers
– With louvers
The function uses
– 2 I/O points for actuators with 2 end switches
– 3 I/O points for actuators with 3 end switches
the fourth I/O point must remain unused
The function generates switching pulses for the 2 or 3 relays from the structured
process value AOBValue.
The blinds control function is shared between module and bus master (application
function). The application function in particular is responsible for the louver angle. For
this reason, the process value is sent in both directions: to the periphery as a
command, and to the bus master as a status signal.
LED
I/O
processing
measurement
I/O
processing
I/O
processing
measurement
Output
Command
n
DOWN2
n + 1
UP
n
DOWN2
n + 1
UP
n + 2
DOWN1
n + 3
--
TX-I/O™ Module system – Functions and operation
Digital output functions
Current
Current
Description
RUN_DOWN
DOWN (to position "0%")
RUN_UP
UP (to position "100%")
RUN_DOWN
DOWN (to position "0%")
RUN_UP
UP (to position "100%")
DOWN to middle position (end switch
between position 0 and 100%)
Output n+3 must remain free
AOBValue
Channel selection,
current supervision,
pulse generation,
processing (timing)
depends on
configuration (2 or 3
limit switches)
CM110561en_08
47/54
2018-10-25
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