Siemens BACNET 125-5037 User Manual
Page 32
Point Database
22
Siemens Building Technologies, Inc.
Descriptor Address
1
Application Description
NGT OVRD
{21}
2
All except
2597
Indicates the mode that the controller is operating in
with respect to the override switch. NIGHT indicates
that the switch has not been pressed and the
override timer is not active. DAY indicates that the
switch has been pressed and the override timer is
active. The controller then uses a day mode
temperature setpoint. This point is only in effect
when DAY.NGT indicates night mode.
REHEAT START
22
All except
2560, 2561, 2597
Determines how the reheat modulation will be
sequenced while in heating mode. When HTG
LOOPOUT is above this value, then the reheat
modulates upward.
REHEAT END
23
All except 2560,
2561, 2597
Determines how the reheat modulation will be
sequenced while in heating mode. When HTG
LOOPOUT is below this value, then the reheat
modulates downward.
DI 2
{24}
All
Actual status of a contact connected to the
controller at DI 2. ON indicates that the contact is
closed; OFF indicates that the contact is open. If a
wall switch is used, it is connected to DI 2. See
WALL SWITCH.
DI 3
{25}
2
All except
2561
Actual status of a contact connected to the
controller at Al 3/DI 3. ON indicates that the contact
is closed; OFF indicates that the contact is open.
When a contact is connected at DI 3, Al 3 is not
available. See AUX TEMP.
SERIES ON
26
2564, 2565
When flow rises above this value, the series fan will
turn ON.
SERIES ON
26
2566
This point is present, but not used in this
application.
SERIES OFF
27
2564, 2565
When flow drops below this value and other
conditions have been met, the series fan will turn
OFF.
SERIES OFF
27
2566
This point is present, but not used in this
application.
PARALLEL ON
28
2564
This point is present, but not used in this
application.
PARALLEL ON
28
2566, 2567
When flow drops below this value and other
conditions have been met, the parallel fan will turn
ON.
DAY.NGT {29} All
Indicates
the
mode in which the controller is
operating. Day temperature setpoints will be used in
day mode. Night temperature setpoints will be used
in night mode. This point is normally set by the field
panel.
PARALLEL OFF
30
2564
This point is present, but not used in this
application.