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36
Function block
In addition to the pre-defi ned optional functions, func-
tion blocks consisting of thermostat functions, timer
and differential functions are available. With the help
of these function blocks, further components, resp.
functions can be controlled.
To each function block, sensors and free relays can be
allocated. Sensors already in use can be allocated again
without impeding their control functions.
Within a function block the functions are intercon-
nected (AND gate). This means that the conditions
of all the activated functions have to be fulfi lled (e.
g. thermostat and timer) for switching the allocated
relay. As soon as one condition is not fulfi lled, the relay
is switched off.
Thermostat function
The switch-on condition for the thermostat function
is considered fulfi lled when the adjusted switch-on
temperature (
Th(x)on
) is reached.
It is considered unfulfi lled when the adjusted switch-
off temperature (
Th(x)off
) is reached.
Allocate the reference sensor in the
Sensor
channel.
Adjust the maximum temperature limitation / thermo-
stat function for afterheating with Th(x)off > Th(x)on
and the minimum temperature limitation with Th(x)on
> Th(x)off.
The temperatures cannot be set to an identical value.
D
T function
The relay allocated to the function block is switched
on as soon as the adjusted switch-on temperature
difference (
Δ
T(x)on
) is reached. It is switched off as
soon as the adjusted switch-off temperature differ-
ence (
Δ
T(x)off
) is reached.
Timer
The relay allocated to the function block will be
switched on when the operation time is within the
adjusted time frame.
Reference relay
Up to 5 reference relays can be selected.
Whether the reference relays are to be switched in
series (AND) or in parallel (OR) can be adjusted in
the
Mode
channel.
OR mode
If at least one of the reference relays is active, the
switch-on condition for the function block is consid-
ered fulfi lled. The switching conditions of all other
activated functions of the function block have to be
fulfi lled as well.
AND mode
If all reference relays are active, the switch-on condi-
tion for the function block is considered fulfi lled. The
switching conditions of all other activated functions of
the function block have to be fulfi lled as well.
Function
Thermostat a
Tha- S3*
Thb-S4
Timer
R3*
RX
D
T-S3>S4*
Thermostat b
D
T function
Timer
Reference relay
Reference relay
1. in parallel (OR)
2. in series (AND)
Reference relay
Reference relay 1
Reference
relay 1
Reference relay 2
Reference
relay 2
Reference relay 3
Reference
relay 3
Reference relay 4
Reference
relay 4
Reference relay 5
Reference
relay 5
* exemplary selection, sensors and relays can be allocated freely
Relay