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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Digital output functions 2018-10-25
Pressing the middle of one of the manual switches assigned to the function
enables/disables local override.
When local override is active:
• Pressing "+" on one of the I/O points switches the load up one stage.
Repeated or sustained pressure can be used to switch through several stages until
the function reaches the highest stage.
• Pressing "–" on one of the I/O points switches the load down one stage.
Repeated or sustained pressure can be used to switch through several stages until
the function stops at the lowest stage.
• The change from one stage to the next occurs only after a delay of 0.3 s.
This makes it possible to reach a stage directly (e.g. jump from stage 2 to stage 0
and then to stage 3).
Users themselves must know whether switch-off is required before
switching to another stage.
• The Override LED of all I/O points assigned to the function go off briefly while the
switch is pressed.
• The I/O status LEDs light up whenever the relays are active.
• Local operation can be disabled in the configuration.
For details, especially in relation to flashing pattern and errors: refer to the section "Dis-
play, operation and diagnostics" in the TX-I/O™ Engineering and installation guide [6].
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