32
ABB i-bus
®
KNX
Project design and programming
109
Telegr. Communication
receive
General
1 bit (EIS 1)
DPT 1.002
C, W
General Telegr. Communication receive [EIS 1; 1-bit switching]:
The DALI Gateway can
receive a “1” telegram via this communication object which another KNX device
(e.g. diagnostics module) sends cyclically. On receipt of the telegram, the communication
capability of the bus can be monitored. If the DALI Gateway does not receive a “1” telegram
at the communication object “Telegr. Communication receive” within a specific time interval,
a fault in the KNX communication path is assumed and the response defined in the
General
parameter window is carried out. The DALI Gateway goes into a safety state and does not
process any telegrams. Incoming telegrams are only processed again when a “1” is received
again at the communication object “Telegr. Communication receive”.
The time span of the receiving interval can be set in the
Status
parameter window under
“Transmission / receive period”.
110
Detect Ballasts
General
1 bit (EIS 1)
DPT 1.010
C, W
General Detect Ballasts [EIS 1; 1-bit switching]:
To be able to correctly detect a fault in a
ballast, the DALI Gateway must identify all the connected DALI devices and thereby know the
number of DALI devices per channel that need to be monitored. This identification process
runs independently and fully automatically in the background if it has been initiated by this
communication object. An automatic detection e.g. after a bus or mains voltage recovery
does not take place. After approx. 60 seconds, all the DALI devices are detected and the
failure of a ballast can be correctly established.
The activation should be carried out directly after commissioning or when extending or redu-
cing the DALI devices. The DALI devices are continually monitored, independence the lamp
is activated or deactivated. The DALI devices must be installed properly and supplied with
operating voltage if necessary.
Telegram value
“1”: Start ballast detection process
“0”: No function
Continuation Table 9: Communication objects “General”