January 2005
69
ABB i-bus
®
EIB
ABB Powernet EIB
LEANtouch (monochrome),
SMARTtouch (monochrome, colour)
Type: 6x36/30M(-500), 6x36/100x(-500), 6x36/100CB
If the input and output objects are
1 bit, it is possible to invert the output.
An inversion element can therefore be
implemented by a gate.
It is also possible to block signals via
the “Filter function” setting. The
following settings are possible: “Filter
nothing”, “Filter ON” or “Filter OFF”.
This function is e.g. only necessary if
the ON telegram from a sensor is of
interest and this sensor does not
have a filter function in its application
program.
Temperature comparator
The two temperature comparator
functions correspond to the functions
of the DIN rail mounted logic module.
Temperature comparator 1I1O
With the function “Temperature
comparator 1I1O”, a temperature is
compared with an internally defined
temperature value. The function
makes an input available with a
2-byte communication object.
Temperature telegrams which are
triggered by an EIB temperature
sensor are received at this object and
compared.
The value which the temperature at
input 1 should be compared with, is
defined in the parameter
“Comparative value in °C”. This
comparative value (input 2) can adopt
values between –30 °C and +70 °C.
Application example:
Monitoring of a warehouse. Food
should be stored in the warehouse at
a temperature below 12 °C. An EIB
temperature sensor is installed for
this purpose. If the storage
temperature exceeds 12 °C, a cooling
unit is switched on in order to keep
the food fresh.
So that telegrams are not triggered
continually, if the temperature values for
comparison are almost identical, it is
advisable to set a hysteresis. By default,
this is set at 1.5 K. This means that if the
temperature of the comparative value has
a value of 12 °C and the temperature at
the input exceeds a value of 12 °C, a te-
legram is not immediately triggered at the
output. It is only triggered when it exceeds
12.75 °C. The output is reset when a tem-
perature falls below 11.25 °C.
The output communication object is
1 bit by default. ON or OFF telegrams
are sent to this object. It is defined in
the parameters when a telegram is
sent. Depending on the setting
“Telegram will be sent at”, telegrams
are triggered if an input is greater
than another input or if the result
changes. A change in the result
means that the value of the input has
exceeded or fallen below the
comparative value.
In addition, it can be set whether an
ON telegram or an OFF telegram is
sent when the value exceeds or falls
below the comparative value.
1-byte values can also be sent to the
output object. To do so, the parameter
“Object type of the output” must be set
to “1 byte”. In a similar way to the
switch output, different conditions can
also be set to determine when a
telegram should be sent. The value
which is sent is defined with the
settings “It will be sent if input >
comparative value” or “…if input <
comparative value”. Values between 0
and 255 can be sent.
The output value is sent cyclically if
the setting “Send output cycle” is
activated. The cycle time is set by
default at 9:59 but can be adapted to
a required cycle time.
Temperature comparator 2I1O
Two temperatures can be compared
with this function. There are two
separate inputs available with 2-byte
communication objects. Temperature
telegrams which are triggered by EIB
temperature sensors are received at
these objects and compared with
each other.
Application example:
Summer/wintertime conversion in a
ventilation control system. An EIB
temperature sensor is installed in the
supply air and discharge air ducts. If
the incoming temperature is identical
to or warmer than the outgoing tempera-
ture, it is possible to switch to summer
mode.
The output communication object is
1 bit by default. ON or OFF telegrams
are sent to this object. It is defined in the
parameters when a telegram is sent.
Depending on the setting “Telegram will
