### BACnet CCN Alarm The information below provides a FULL description of this microblock and all of its properties. What information you see and what you can do with it depends on your license and the application you are in, and in some cases, a controller's driver version.
Microblock family | Carrier microblocks
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What it does | The BACnet CCN Alarm microblock monitors CCN alarms and passes them from the Carrier device to the WebCTRL® Alarms page or third-party BACnet front end. The Alarm ID string is used to match an incoming CCN alarm to this microblock. In most cases, this is the CCN variable name. This microblock monitors all CCN alarms, and sends an alarm event to the WebCTRL® application when a CCN alarm is received that matches the Alarm ID. Also, you can define a BACnet CCN Alarm microblock with Accept all Alarms checked to act as a catchall for alarms that do not match other Alarm microblock match strings. When the WebCTRL® application receives an alarm, it searches all BACnet CCN Alarm microblocks for matching Alarm ID's. If no match is found the alarm is processed by the BACnet CCN Alarm microblock that has Accept all Alarms checked. Two alarms will be generated: one from the BACnet CCN Alarm microblock that includes the original CCN alarm text, and another from the related "Point" microblock because the Present_Value (updated via the received alarm message) may trigger an alarm intrinsic to the AV or BV object in the "Point" microblock. If this behavior is undesirable, the Event_Enable flags in the corresponding "Point" microblock should be set to FALSE to inhibit the intrinsic alarm from the "Point" microblock. This microblock will have a digital output wire that transitions to “on” when the alarm is active. If Accept all Alarms is checked – then the output will toggle on then go back off. RTN messages are posted as a separate event. If that is desired another microblock with the “specific” text should be added. Then, the output will stay active until an RTN of that type of alarm is received. The parameters for this microblock will be similar to the alarm parameters in any Automated Logic® microblock that can be an alarm source, and the user will be able to enable and disable this alarm. When disabled, the microblock will still reflect the alarm status of the CCN device that sourced the alarm, but an event will not be sent to the WebCTRL® application.
Click for details below Properties Alarm Simulation
#### Properties TIPS Alt+click any value in the WebCTRL® or Field Assistant interface to view property details, including its editing privilege and expression (location path) for use on graphics. You can right-click some properties in the EIKON® Property Editor and select Make editable or Make read-only to determine that property's functionality in your system.
Display Name |
Reference Name RefName | Use the default reference name unless you want a more descriptive name for graphics or network links. Limitations: lower case only limited to 40 characters cannot begin with a number must be unique within a control program
Description | NOTE To use this field, the device's driver must be equal to or greater then 3.04.xxx. You cannot edit this field during run time. Use the text portion of the CCN alarm message generated by the Automated Logic® PIC device. Enter the following text `match="T051%x"` `T051%x` respresents the CCN alarm code generated by the CCN equipment. See Carrier's Controls and Troubleshooting Guide for specific alarm codes.
Network Visible | Check to make the microblock's output visible to third-party equipment.
Controller | Do not change this path from the default CCN://LINK. If altered, the alarms will not be forwarded.
Alarm ID | A variable name/point name of the Carrier CCN point you wish to monitor for an alarm.
Active/Inactive Text | The WebCTRL® interface displays the Active Text when an alarm occurs, and the Inactive Text when the alarm status is normal.
Editing Privilege | Preset - Each microblock property has an appropriate privilege or role assigned to it. You can use Global Modify in the WebCTRL® interface to find out what the actual privilege is. CAUTION If you change the Editing Privilege from Preset, the privilege you select will be used for all properties of this microblock, which is not always desirable.
Object ID | Auto-assign - A BACnet Object ID is assigned by the system. Use specific value - (0–3999999) Assign a number that is unique within the controller.
#### Alarm
Accept All Alarms | Acts as a catchall for alarms that do not match pre-defined Alarm ID strings. When an alarm arrives, it will first search all BACnet CCN Alarm microblocks for matching Alarm ID's, if no match is found, the alarm will be processed by the BACnet CCN Alarm microblock with Accept all Alarms.
Potential alarm source | Check to make this microblock available in the system's Alarm Sources list.
Critical | Determines the color of the system-wide alarm button when the alarm comes in if the alarm's Template field is set to Universal. = Critical = Non-critical
Category | The category you want to use to filter this microblock's alarms on the system's Alarms page > View tab.
Template | Universal - Allows your system to use the Alarm text and Return text defined in the microblock, and the Critical checkbox to determine the color of the system-wide alarm button when the alarm comes in.
Alarm Enabled? | Check to send a message when this microblock indicates an alarm condition.
Alarm State | Select the checkbox to have an alarm condition exist when the microblock's present value is on (true). Clear the checkbox to have an alarm condition exist when the microblock's present value is off (false).
Return Enable | Check to send a message when an alarm condition has returned to normal.
Fault Enable | Check to send a message when a fault condition occurs, such as a misconfigured or non-existent sensor.
Alarm requires acknowledge | Check to require that an operator acknowledge alarm notifications on the system's Alarms page > View tab.
Return requires acknowledge | Check to require that an operator acknowledge return-to-normal notifications on the system's Alarms page > View tab.
Alarm text | The message displayed on the WebCTRL® Alarms page > View tab when an alarm condition occurs. A relative path is useful for alarm messages that you will reuse in multiple WebCTRL® locations because the path is relative to the item that contains the path.
Return text | The message displayed on the WebCTRL® Alarms page > View tab when an alarm condition returns to normal. A relative path is useful for alarm messages that you will reuse in multiple WebCTRL® locations because the path is relative to the item that contains the path.
#### Simulation Define the value(s) the microblock will use when you simulate the control program.