3 TROUBLESHOOTING
3.3 Troubleshooting by Symptom
235
3
Troubleshooting related to settings and operations
Symptom Check point Corrective action
COV notifications are not sent. Is the information to send COV notifications set
correctly?
• Review the COV notification send
setting.(Page 177 COV notification send
setting)
Is a SubscribeCOV service sent to a BACnet
module?
• To check the reception of the notification, send a
SubscribeCOV service to the BACnet module.
COV notifications are not sent. (For AI/AO/AV
object)
Is the value of the COVIncrement property correct? • Review the setting of the COVIncrement
property. (Page 178 To set the change
amount of a value to send COV notifications)
COV notifications are not sent. (When joining/
leaving BACnet)
Is the BACnet standard with which the BACnet
module complies correct?
• Check if the BACnet standard with which the
BACnet module complies is IEIEJ-G-0006:2006
Addendum-a, ANSI/ASHRAE 2004, or ANSI/
ASHRAE 2010. (Page 198 Basic
information)
Is the send destination of COV notifications
correct?
• Check the setting of the
Restart_Notification_Recipients property of the
Device object.
Event notifications are not sent. Is the information to send Event notifications set
correctly?
• Review the Event notification send
setting.(Page 180 Event notification send
setting)
Event notifications are not sent. (When joining/
leaving BACnet)
Is the BACnet standard with which the BACnet
module complies correct?
• Check if the BACnet standard with which the
BACnet module complies is IEIEJ-P-0003:2000
Addendum-a.
Unable to synchronize the time with another
BACnet device.
Is a program to change the time on the CPU
module with the received time created?
• Create a program.
Is the BACnet module set as a destination on
another BACnet device?
• Set a BACnet module as a destination on
another BACnet device.
Another BACnet device does not synchronize time. Is the destination set to the
TimeSynchronizationRecipients property of a
Device object?
• Set the destination on another BACnet device.
The schedule is not executed. Is the BACnet standard with which the BACnet
module complies correct?
• Check the processing method of the schedule
with the BACnet standard with which the BACnet
module complies.
Is the information to execute the schedule set
correctly?
• Review the settings of related objects.
Is the time on the CPU module correct? • Check the time of the CPU module.
Unintended schedule is executed at 0:00. Is the Schedule_Default property value of the
Schedule object output?
• Set the value of the ScheduleDefaultDisable
property as "True" to enable the consecutive-day
schedule.
Unable to perform logging. Is the information for logging set properly? • Review the settings of the TrendLog object.
(Page 114 Settings to start logging)
Unable to check the log record of the BACnet
module from another BACnet device.
Is a ReadRange service in which the LogBuffer
property of the TrendLog object specified sent?
(Log records cannot be read by a ReadProperty
service.)
• Send a ReadRange in which the LogBuffer
property of the TrendLog object specified from
another BACnet device.
The screen transition or the behavior when clicking
a button is slow.
A white screen is displayed.
Is the communication load to the BACnet module
high?
• Wait until the white screen disappears and the
setting screen appears.
(The response may be slow when
communication load is high or a mass of
information is set to a BACnet module.)
There is a property, the button of which is disabled
and cannot be set.
Is the BACnet module in communication (the
ba
ckground of the screen is blue)?
• Stop the operation of the BACnet module.
(Page 224 Pause)
Is the property not editable? • Check if the property is defined as "Not editable"
or "Read-only" by BACnet standards.
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