### Analog Network Output 2 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 | Network I/O microblocks
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What it does | Writes an analog value to a specific address on the network. Stops writing to the target address when the Enable input is false (off). If writing to a BACnet object property value, when the Enable input transitions from true (on) to false (off), the microblock relinquishes control of the target value. You can address the microblock to write to any I/O point value, status or parameter microblock value, BACnet object property value, or equivalent value from another supported protocol that is not marked "read only". The target value may be in the same control program, in another control program in the same controller, or in another Automated Logic® controller or third-party device on the network.
Click for details below How it works Properties Tips and tricks
#### How it works At the interval you specify in the Refresh Time field, this microblock writes to the value at the Address you specify. The target must not be "read only". The target can be a BACnet object property or a third-party value (if the controller supports the third-party protocol). See To format a BACnet address or the applicable third-party protocol Integration Guide. If you want the microblock to write to its target based on COV (Change of Value), check this microblock's COV Enable checkbox on the equipment's Properties page Network Points tab. If COV Enable is selected, the microblock writes to its target when the Enable value transitions from off to on, and when the microblock's input value changes from the previous written value by at least the COV Increment amount. If the target is a BACnet object property, when the Enable? input transitions from true (on) to false (off), the microblock relinquishes control of the target property. For example, in a smoke control application, if smoke is detected, turn on the Enable? input and write a VFD fan drive to 100% at BACnet Priority 2. After the smoke alarm is cleared, turn off the Enable? input. The microblock sends a relinquish default command to clear the Priority 2 command to the VFD and allow the drive to resume normal operation.
#### 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 | The microblock label used in the EIKON® application and the WebCTRL® interface. You can use any characters except the " character.
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
Lock Present Value | Check to output the locked value from the microblock instead of the microblock's calculated value.
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.
Display resolution | The microblock's value is truncated and incrementally updated as follows: The Display resolution format is used to truncate the microblock’s actual value. For example, if you enter a value from: 0.1 to 0.9, the system displays 1 digit to the right of the decimal 0.01 to 0.99, the system displays 2 digits to the right of the decimal 1 or greater, the system displays a whole number The Display resolution value determines the increment by which the displayed value is updated. For example, if you enter: .2, the system displays 8.4, 8.6, 8.8, ... .03, the system displays 5.09, 5.12, 5.15, ... 10, the system displays 30, 40, 50, ...
Address | The address of the target BACnet object property or third-party value (if the controller supports the third-party protocol). See To format a BACnet address or the applicable third-party protocol Integration Guide. The microblock writes to its target at the Refresh Time interval unless you set up writing based on COV (Change of Value) in the WebCTRL® or Field Assistant system. Make sure that the target is not marked "read only". NOTE For a target in the Automated Logic® controller, you can specify the network microblock's Address in: Your WebCTRL® or Field Assistant system - Select the target in the tree on the microblock's Properties page Details tab. The system creates the address for you. The EIKON® application - In the microblock's properties The SiteBuilder application - If your product supports source trees and you are using them, SiteBuilder creates the address for you. NOTE You can uncheck the Editable field in the EIKON® Property Editor to prevent editing of the address in the WebCTRL® or Field Assistant system. TIP If you are integrating to multiple identical third-party devices, you can copy the equipment for the first device and then let the system help you address the Network I/O microblocks in the copies. See "Create a control program" in the BACnet Integration Guide.
COV Increment | The amount by which this microblock's input value must change before the microblock writes a new value to its target. Not used if the microblock writes at the Refresh Time interval. NOTE To write based on COV, in your WebCTRL® or Field Assistant system, check this microblock's COV Enable checkbox on the equipment's Properties page Network Points tab.
Communications Enabled | Check to enable network communications for this microblock. Uncheck when troubleshooting.
Refresh Time | The interval at which the microblock writes to its target. Not used if you check the microblock's COV Enable checkbox on the equipment's Properties page > Network Points tab to write based on COV (Change of Value).
Show Property Page Text | Check to show this microblock's value on the equipment's Properties page.
#### Tips and tricks To address microblocks using source trees You can address a network microblock in the EIKON® application to target a microblock in its parent application on the source tree.
Format: Example: | exp:~equipment/~<source tree reference name>/~parent/~target/<target microblock reference name> exp:~equipment/~cool/~parent/~target/supply_air_temp
By using this format in the EIKON® application, the WebCTRL® application will read the target microblock value from the parent application. This method is much faster than going to each zone individually in the WebCTRL® interface to address the network microblocks. For example, this allows you to create generic zone applications that can be reused not only for all zones under a single air handler, but for all zones under any air handler.