Ekinex EK-GA1-TP, Applications Manual, Page: 12 / 41

Application manual
KNX binary output modules EK-GA1-TP
Release 1.5 - Update: 02/2022 MAEKGA1TP_EN
© EKINEX S.p.A. - All rights reserved Page 12
6.4 Online operation
The device works as a controlled switch, activating its own outputs according to the commands received
from the bus as KNX telegrams.
6.4.1 Software working cycle
The software working cycle can be described as follows:

Handle incoming telegrams from the KNX bus to update internal state variables

Implement timing functions and other inbuilt functions to determine effect on physical outputs;

Drive output relays according to output status

Respond to bus messages requesting feedback on the status of the outputs and of the device.
There are also special events on which it is possible to trigger additional features. These events are the bus
failure and recovery, and the download of a new configuration with ETS.
6.4.2 State variables (Communication objects)
The determination of the status of physical outputs is made basing on internal state variables. These state
variables, once assigned a group address, are actually KNX communication objects, which allows other
devices on the bus to exploit the features of the device.
State variables undergo the usual rules for communication objects, among which
– for instance – the effect
of flags to determine how the change of value affects the transmission of the objects.
6.4.3 Output handling features
The outputs are dimmable AC channels; each channel can be driven independently.
Each output is rated for a load ranging from 10W to 300W at 230 V AC.
In the simplest case, three communication objects per channel are provided to drive the outputs:

On-Off command , that switches each channel output directly

Dimming command , that modifies the dimming percentage of a channel in an incremental way, i.e.
with “up / down / stop” type commands

Absolute setpoint control , that allows to directly specify the absolute dimming percentage.
One communication objects per channel is provided as a feedback:

Actual dimming value , that returns the current value of the dimming percentage.
6.4.4 Switching feature overview
By setting the device parameters, it is possible to activate additional features, most of which will also affect
outputs. These features are:

Feedback: sends message on each On
– Off switching operation or cyclically each period of time

Time delay block: allows to perform the actual switch with a programmable delay. It is available (with
separate delay settings) both for the On-Off and for the Off-On transition.

Staircase function: performs a retriggerable time period activation of an output.

Logic function: allows to compute the output value as a logic function based on the value of several
communication objects.