Direct Digital Controller
86 Direct Digital Controller fw 4.013 – Ed. 01/2013
4.4.2.4 Alarm output setup
On the rear of the Direct Digital Controller there is a clean contact to send an external signal if errors have
occurred in any machines (see detail “B” Figure 13 on page 54). The DDC allows one of the following options
to be set:
Disable the signal output in the event of alarm;
Enable the sending of a signal for any type of alarm;
Enable the sending of a signal only in the event of “Temperature alarms” (Master DDC only).
To configure one of the options described above, follow the instructions below:
1 - Select
from the initial screen to gain access to the main menu.
2 - Select
to gain access to the System installation.
3 - Enter the installer password on the numerical keypad that appears on the display.
4 - Select “Plants” from the drop-down menu.
5 - Select the plant for which the alarm output is to be set:
for two-line cooling/heating plant; for
the hot water production plant;
for the chilled water production plant.
6 - Turn the knob to scroll the cursor downwards until “Alarms Outp. Setup” is selected and press the knob
to access the screen.
7 - Position the cursor on
next to the option to be set (Disabled, Any alarm, Water temp. alarm).
8 - Press the knob to activate the option. The
symbol indicates that the option has been enabled .
9 - To exit, select
.
Repeat steps 5 to 9 for the second plant if the DDC manages two plants.
If the alarm output is enabled for 2 separate plants managed by the DDC, the contact trips if an alarm
condition is present in at least one of the two plants.
NOTE 2
NOTE 1
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