Technical Manual
–
Central Operation Unit Smart
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Phone: +49-2263-
880 • Fax: +49-2263-4588 • [email protected] • www.mdt.de
129
129
Functional principle:
The function "switching values/scenes" can send up to 4 different values by shortly pressing a button.
The values are then switched one after the other. Depending on the set parameters, for example, at
a keystroke the second switching value is sent if the 1st switching value has been sent before or the
third switching value will be sent if the second switching value has been sent befor…
Parameter “Push button long”:
Additionally to a switch over at a short keystroke, a fixed value can be sent at a long keystroke.
For example, the 1
st
-4
th
switching value can be sent. Thus, the selected fixed switching value
(independent of the last switching value) would always be sent with a long keystroke.
The setting "4th Switching value if previous was 1st value, otherwise 1st value " represents a toggle
function, which switches back and forth between the 1
st
and 4
th
switching values. If the 1st switching
value was sent last, the 4th changeover value is sent, for each other value the 1st switching value is
sent.
The setting "send 0" causes sending the value 0 to the switch object.
The setting "On at second object" or "Off at second object" shows another communication object for
the long keystroke. The fixed value On or Off is then sent to this object with the size 1 bit.
Parameter “Switching type”:
Limit stop:
When the switching type "limit stop" is activated, the 4
th
switching value is sent again
after the 4
th
switching value has been sent.
Overrun:
When the switching type "overrun" is activated, the 1
st
switching value is sent again after
the 4
th
switching value.
Parameter “Switchover considers status object”:
If the
status value
is not taken into account
during the changeover, the button memorizes the last
sent value and sends the next or previous value on the next actuation without observing whether
another value has been sent to the object in the meantime.
If the
status value is taken into account
during the changeover, the next keystroke will send the next
higher or the next lower shift value - with respect to the last received status value. Example: the 2nd
switching value is set to 40% and the 3rd switching value is set to 70%. Now, after a received status
value of 50%, the value 70% is sent at next keystroke if the next switching value is to be sent and the
value 40% if the previous switching value is to be sent.
The following table shows the available communication objects.
Number Name
Length Usage
0
Function 1
–
switch control, percent value…
Sending the switching value; DPT
depending on the parameter setting
1
Function 1
–
State switch control, state of
percent value ….
Receiving the status; DPT depending on the
parameter setting
Table 122: Communication objects "send values" - switching values/scenes (up to 4 values)