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9.26 SETS DIGITAL INPUTS LOGIC
— Enables or disables digital input ID1 (its function is to give the ON/OFF com-
mand from digital input)
— Sets the logic with which to manage input ID1. The logics can be:
CLOSED = if ID1 is closed the unit is OFF;
OPEN = if ID1 is open the unit is OFF;
— Enables or disables digital input ID3 (its function is to use setpoint 2)
— Sets the logic with which to manage the ID3 input. The logics can be:
CLOSED = if ID3 is closed the setpoint 2 is selected;
OPEN = if ID3 is open the setpoint 2 is selected;
9.27 SETS DIGITAL OUTPUTS LOGIC
Sets the logic with which to manage the NO8 output (output to signal an active
alarm). The logics can be:
CLOSED = if NO8 closed it indicates alarm active;
OPEN = if NO8 open it indicates alarm active;
9.28 SETS LOGIC FOR MASTER/SLAVE UNITS MANAGEMENT
1. Select the type of installation. This type can be:
STAND ALONE = a single unit;
MASTER = unit congured as Master (installation consisting of two separate units);
SLAVE = unit congured as Slave (installation consisting of two separate units);
2. Sets the value to which the power request is limited in the initial stage, in order
to avoid start-up of both chillers for a "false" load
3. Sets for how long to keep the lock specied in point (2) active
4. Enables to set the power distribution between Master and Slave. With parame-
ter = 0.1% the required power increases simultaneously on the Master and on
the Slave. With parameter = 100.0% the required power increases rst on one
chiller then on the other based on the number of hours of operation. Priority
is given to the master or slave by looking at the number of operating hours of
the master and slave compressors.
5. It turns the master or slave pump o if there is no compressor request in that
circuit.
9.29 ENABLE OFF/ON KEY IN THE LAYOUT PAGE
YES = the o/on key in the system layout page is present;
NO = the o/on key in the system layout page is hidden and only the machine
status is displayed.
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