Error Reporting Application

The C-Bus Error Reporting application is used to notify and manage error of other status information detected by C-Bus devices.

The C-Bus devices can monitor various operational parameters, and can report error or warning conditions using the
C-Bus Error Reporting application.

The reports consists of information on the source, severity and nature of the error or fault condition, and also allow independent tracking and acknowledgement of the most recent and most severe conditions.

The reports are monitored by a device such as a SpaceLogic C-Bus Automation Controller, which can:

display the status to the user
allow them to acknowledge reports
and as well as clear any latched errors

A SpaceLogic C-Bus Automation Controller can also make all of this available to a higher layer such as a BMS via BACnet.

There are 5 Error Reporting Modes. The mode controls:

which error reports are generated
and when they are generated

The mode can either be fixed during commissioning time, or can be changed dynamically by assigning a control group on the Enable Control application.

In addition to controlling the generation of error reports using the mode, a Trigger Control Group may be configured to request an update to ALL error channels at any time. This can be useful to manage traffic in an installation, where a large number of Error Reporting devices or channels exist.

Modes	Types of errors	Description
Mode 0	OFF	In this mode, neither live reports nor regular reports are generated
Mode 1	All channels: Most Recent Errors only	In this mode, live reporting is enabled, meaning a change in error state for any channel will be emitted when it occurs In addition, if the Regular Reporting Interval parameter is configured, the current error state of all channels will be re-sent at the configured interval Setting the Regular Reporting Interval to zero disables the regular reports, but live reporting remains active. This allows timely notification of error status changes but without the traffic overhead of additional regular reports
Mode 2	All channels: Most Recent and Most Severe Errors	This mode works the same as Mode 1, but also includes tracking of the Most Severe errors for each channel
Mode 3	Minimum reporting: Most Recent Errors only	This mode works the same as Mode 1, but excludes the individual channel reports This can be useful to reduce the amount or traffic where there are a large number of channels or a large number of devices exist. The aggregate channel is included, which is a logical OR of all of the channel error bytes, which still allows channel errors to be monitored
Mode 4	Minimum reporting: Most Recent and Most Severe Errors	This mode works the same as Mode 2, but excludes the individual channel reports

The following channel error status information is available via the Error Reporting application:

Mode Error: The channel has shut down due to the attached load being incompatible with the currently selected mode
Incompatible Load: The channel has shut down due to the attached load being incompatible with load profile
Over-temperature Windback active: The channel is operating at a reduced operating point due to excessive temperature
Over-temperature Shutdown : The channel has shut down due to extreme temperature
Over-current Shutdown: The channel has shut down due to an extreme current overload
Channel Offline : The channel is not responding
Channel Overridden : The channel has been overridden by the local override, and C-Bus priority is disabled

New devices include an aggregate channel (251) which reports the aggregate (logical OR) of all channel errors.

When used in conjunction with Error Modes 3/4 and a Trigger event for requesting update, this can be useful to minimize Error Reporting traffic.

NOTE: To fetch detailed channel error information, request using the Trigger.

New devices which include a C-Bus Power Supply include a Power Supply Error channel (250).

The power supply error channel allows reporting of up to three error conditions:

Load warning : The load current on the C-Bus Power Supply has exceeded the user-configurable warning threshold level
Over-current : The load current on the C-Bus Power Supply has exceeded the rated load current
Current Limit : The power supply is in current-limit mode, meaning the network is probably inoperable

The load warning and over-current errors are optional. If the warning threshold parameters are not configured, both these errors are disabled. Once the warning threshold parameters are configured, both errors are enabled.

The Current Limit error is always enabled. However due to the nature of the fault, it may only ever appear when most severe errors are enabled, as the network may be made inoperable by this condition.