Specifications

sigmadue - IEC 61131-3 Function Block Library
112
Depending on these digital inputs, the functionality of the module changes as
follows:
• If none of these digital signals are active, the module split the input
MV into
the two action
MVH and MVC . The DBND parameter defines how the Cool
and the Heat channel interact each other. When it is positive, this
parameter defines the dead band width, centered around the value 50.0 of
the input.
It means that when the input is in the range [50.0 – DBND…50.0 + DBND]
both the
OUTC and the OUTH output are 0. When it is negative, the
opposite occurs; for a value included in the dead band, both the
OUTC and
the
OUTH are different from 0.
•If
DTRK (Track) is active, the outputs are set according to the value of the
analog input
TRK . This signal has a range from [0...100.0] and it drives both
OUTH and OUTC . When its value is in the range 0...50.0, it means that a
Cool action must be taken; therefore,
OUTH is set to 0.0, while OUTC is set
to
[RCGA * 2.0 * (50.0 - TRK)] . Inversely, when it is in the range 50.0...100,
OUTC is set to 0, while OUTH is set to [2.0 * (TRK – 50.0)] .
Please note that the tracking value is not affected by the
DBND parameter.
• If the
DAM input is active (and DTRK is inactive) the outputs are set
according to the value of the analog input
AM_VAL . This signal has a
range from [0.0...100.0] and it drives both
OUTH and OUTC . When its
value is in the range 0.0 to 50.0, it means that a Cool action must be taken;
therefore,
OUTH is set to 0, while OUTC is set to [RCGA * 2.0 * (50.0 –
AM_VAL)]
. Inversely, when it is in the range 50.0 to 100, OUTC is set to 0,
while
OUTH is set to [2.0 * (AM_VAL – 50.0)] . These values are valid if the
DBND of the phase splitter is set to 0, otherwise they slightly change.
•
If DAUX (Aux) is active (and both DAUX and DTRK are inactive), the outputs
are set according to the value of the analog input
AUX . This signal has a
range from [0.0...100.0] and it drives both OUTH and OUTC . When its value
is in the range 0.0...50.0, it means that a Cool action must be taken;
therefore,
OUTH is set to 0, while OUTC is set to [RCGA * 2.0 * (50.0 - AUX)] .
Inversely, when it is in the range 50.0...100,
OUTC is set to 0, while OUTH
is set to
[2.0 * (AUX – 50.0)] . These values are valid if the DBND of the
phase splitter is set to 0, otherwise they slightly change.