ABB i-bus® EIB Universal Interfaces US/U 4.2 US/U ... - WindowMaster

ABB i-bus ® EIB
4.2 Overview of the
communication objects
Universal Interfaces
US/U 2.2, GH Q631 0074 R0111
US/U 4.2, GH Q631 0070 R0111
Both the communication objects and the objects are identical for each
channel.
4.3 General functions
Parameters and objects, which apply to the device as a whole, are outlined
in this section.
Parameters and objects which are assigned to each channel, are described
in the following sections using output A as an example.
4.3.1 General parameters
Parameters for the functions which affect the complete device can be set via
the “General” parameter window.
Parameter: “Transmission delay after bus voltage recovery”
The transmission delay determines the period between bus voltage recovery
and the point after which telegrams can be sent. An initialisation period
of approx. 2 seconds for starting the device is included in the transmission
delay.
If objects are read out via the bus during the transmission delay (e.g. from
visualisation terminals), these requests are stored and are likewise answered
once the transmission delay has elapsed.
See section 5.10 for a detailed description of the behaviour on bus voltage
recovery.
Parameter: “ Limit number of telegrams”
In order to check the bus load which is generated by the device, there is a
powerful limit function for telegrams. It is possible to set how many telegrams
can be sent within an adjustable period
(“Max. number of transmitted telegrams within a period”).
Detailed information about the telegram limit function can be obtained under
section 5.2.
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