Operational Description
MECps
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2.5
Special Functions
The Function Button activates MECps640´s special functions. Manual Function and Factory
Reset can be activated. Device settings of MECps640 can be reset to manufacturer default
values with the Factory Reset function. The status of an active special function is indicated by
the LED display (see chapter
LED Indication of Special Functions).
Table 6: Activation of Special Functions
Step
Manual Function
KNX Bus Reset
Factory Reset
1
Hold Function button for
3 seconds
Short press of Function
button for three times
Hold Function button for
15 seconds
2
LED 1 now is orange
LEDs 2 now is red
LEDs 1/2 now are orange
3
Subline restarts
Hold Function button for
3 seconds
4
Device restarts
2.5.1
Manual Function
During normal
operation a rather short press (≈ 3 sec) activates and deactivates the Manual
Function. LED 5 and LED 6 show the current filtering states.
When the Manual Function is active, either all Physical Telegrams or all Group Telegrams or
both pass the MECps640 without filtering. After the Switch-off time period has elapsed,
MECps640 automatically switches back to normal operation. To configure the Manual
Function and set the Switch-off time use the General parameter tab like shown in chapters
. After switching back from Manual Function to normal operation the latest
downloaded parameter setting / filter table entries are active again.
2.5.2
KNX Bus Reset
To reset the secondary KNX bus line (Subline), pressing 3x the Function Button (shortly and in
a row) activates the KNX Bus Reset function.
During the bus reset, the device disconnects the entire bus line from the supplying output
and induces a short circuit for some seconds. LED 1 (State 1) and LED 2 (State 2) light up red
and go off after the reset process is accomplished. Other LEDs are off. The devices connected
to the subline restart during the reset process.
