Alarm Reporting - Honeywell CVL4022ASVAV1 Engineering Manual

20. Navigate to PARAMETERS, BALANCE, MIN_FLOW
21. Set the measured minimum flow calibration value:
MIN_FLOW = measuredValue
22. Navigate to PARAMETERS, OVERRIDE, FLO_OVRD.
23. Set VAV box override to the maximum occupied airflow
setpoint: FLO_OVRD = HISP
24. Navigate to PARAMETERS, SENSORS, AIRFLOW
25. Monitor AIRFLOW value for stability at the maximum
airflow setpoint value.
26. Navigate to PARAMETERS, BALANCE, MAXFLOSP
27. Set the maximum measured flow setpoint: MAXFLOSP
= Avg(AIRFLOW)
28. After the airflow has settled to a stable value, measure
the actual airflow with a calibrated instrument.
29. Navigate to PARAMETERS, BALANCE, MAX_FLOW
30. Set the measured minimum flow calibration value: MAX-
_FLOW = measuredValue
31. Navigate to PARAMETERS, OVERRIDE, FLO_OVRD
32. Return system to normal: FLO_OVRD = ----
Zio - Water Flow Calibration
1. Navigate to PARAMETERS, OVERRIDE, RH_OVRD
2. Set the reheat hot water valve position to the desired
value using: RH_OVRD = (0 to 100%)
3. Implement balancing adjustments.
4. Reset the reheat hot water valve override to automatic
control: RH_OVRD = ----
5. Navigate to PARAMETERS, OVERRIDE, PHT_OVRD
6. Set the peripheral heat valve position to the desired
value using: PHT_OVRD = (0 to 100%)
7. Implement balancing adjustments.
8. Reset the peripheral water valve override to automatic
control: PHT_OVRD = ----

ALARM REPORTING

The controller is capable of tracking and reporting several
types of errors. Groups of errors of the same type are also
reported as an alarm by the controller using nvoAlarmH. This
means that several different errors of the same type will be
reported as a single alarm. For Example: Multiple sensors
connected to the controller may read invalid values and the
controller will log individual errors for each sensor. However a
single 'SensorFailure' alarm will be reported.
The following NVs reports errors and alarms:
nvoError: This contains a list of all of the current errors
detected by the device. This list is the most granular. Errors
are combined together into alarms. There may be one to
many errors represented by each alarm. See the table below
for a mapping of error bits to alarms.
nvoApAlarm: Application alarm group 1. 0 for incactive alarm,
1 for active alarm.
31-00083—02
nvoAlarmH: If an alarm condition is detected, the
corresponding alarm is reported to a supervisory node via
nvoAlarmH. nvoAlarmH reports only one alarm or return to
normal at a time. Each alarm condition is issued only once.
nvoAlarmH is sent over the LonWorks network using
acknowledged service to assure that a supervisory node will
receive the alarm. This NV is intended to be bound to a
supervisory node that logs alarm conditions.
nvoAlarmStatus: contains a list of all the current alarms
currently detected by the device. Each alarm is stored in a bit.
The alarms are the same as reported by nvoAlarmH. This NV
is intended to be used by a Management Tool to poll the
nvoAlarmStatus output for all of the current alarms.
Disabling alarm reporting:
Alarm reporting may be turned off by setting
nviNodeRequest.object_request to
RQ_ALARM_NOTIFY_DISABLED. nvoAlarmH.type then
becomes ALARM_NOTIFY_DISABLED and any further new
alarms or return to normal are not reported. Alarm reporting
may be turned on again by setting
nviNodeRequest.object_request to
RQ_ALARM_NOTIFY_ENABLED, or by application restart
(including restoration of power). When alarm reporting is
turned on again, nvoAlarmH is reported with NO_ALARM,
regardless of whether alarms are currently present. Any new
alarms or returns to normal are then reported via nvoAlarmH.
NOTE: Alarm reporting is inhibited during a startup
delay of 80 seconds following any controller
restart. This is intended to reduce nuisance
alarms by allowing the system to before alarm
reporting begins. However, nvoError starts
reporting current error status within a few sec-
onds after power up.
Suppressing specific alarms:
Reporting of specific alarms can be suppressed by using
nciAlarmInhibit. This nci provides 1 bit for every type of error
that is reported by the controller. If the bit in nciAlarmInhibit is
1, then the corresponding bit in nvoAlarmStatus will be NOT
be set. If the bit in nciAlarmInhibit is 0, then nvoError bit will
propagate to nvoAlarmStatus. Errors will be propagated up to
nvoAlarmStatus only if the Alarm is not inhibited through
nciAlarmInhibit. nvoError will always report errors. Therefore,
the status LED will continue to show the status of nvoError.
Thus it is possible no alarms are reported on nvoAlarmStatus
or nvoAlarmH, but the LED is blinking rapidly indicating an
error on nvoError.
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