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Honeywell Excel 10 W7752D User Manual page 50

Fan coil unit controllers lns plug-ins
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
NV name
field name
nviManCool
nviManHeat
nviManOccCmd
nviManualMode
EN2B-0285GE51 R0909
Table C3. Input Variables for Excel 10 FCU Controllers
digital
engineering units:
state
English (metric) or states plus
or
range
value
SNVT_lev_percent
0 to 100%
163.835% = INVALID
SNVT_lev_percent
0 to 100%
163.835% = INVALID
SNVT_occupancy
OC_OCCUPIED
0
OC_UNOCCUPIED
1
OC_BYPASS
2
OC_STANDBY
3
OC_NUL
255
BYTE
MODE_ENABLE
0
MODE_DISABLE
1
MODE_MANUAL
2
SUPPRESS_ALARMS
3
UNSUPPRESS_ALARMS
4
default
This input variable can be used for master/slave installations
where the cool output is controlled by an external controller node.
In this case, the output signal of the cooling control algorithm (0-
100%) of the master has to be bound to nviManCool and then
takes over the task of the local (slave) control algorithm while the
switch levels operate as locally configured. The heating output will
be closed.
This input variable can be used for master/slave installations
where the heat output is controlled by an external controller node.
In this case, the output signal of the heating control algorithm (0-
100%) of the master has to be bound to nviManHeat and then
takes over the task of the local (slave) control algorithm while the
switch levels operate as locally configured. The cooling output will
be closed.
OC_NUL
This input variable is from an network connected operator inter-
(at application restart)
face or other node that indicates the state of manual occupancy
control (schedule override). It has priority over the time program
(nviTodEvent). When the BYPASS mode is set, the bypass time is
active. When the bypass time has elapsed, the master controller
automatically sets nviManOccCmd to OC_NUL. nviManOccCmd
does not provide a failure detect mechanism in case no periodic
update is received.
MODE_ENABLE and
This input variable is used to disable the controller's control
UNSUPPRESS_ALARMS
algorithms in order to manually set its physical outputs. The
(at application restart)
controller still responds to smoke purge even when disabled or set
to manual or factory test mode. It remains unchanged until another
mode has been commanded or an application restart has been
performed.
• MODE_ENABLE: starts the control algorithm at an initial state
after MODE_DISABLE or MODE_MANUAL.
• MODE_DISABLE: all outputs switched OFF, the alarm
ALARM_NODE_OFF is issued.
• MODE_MANUAL: all control loops are disabled and the alarm
ALARM_NODE_OFF is issued. The outputs can be controlled
manually via the nviTest command
• SUPPRESS_ALARMS: nvoAlarm is not sent and
nvoAlarmStatus and nvoAlarmLog are not updated until
UNSUPPRESS_ALARMS is set or an application restart.
• UNSUPPRESS_ALARMS: releases alarm suppression after
SUPPRESS_ALARMS.
48
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