Analog Output Commands - Metasys - LIT-12011942 - "" - Software Application - Metasys Open Data Server

Analog Output Commands - Metasys - LIT-12011942 - "" - Software Application - Metasys Open Data Server - 10.1

Metasys Open Data Server Help

Product

Building Automation Systems > Databases and Data Servers > Metasys Open Data Server

Document type

User Guide

Document number

LIT-12011942

Version

10.1

Revision date

2019-10-14

The table below lists the commands supported by the Analog Output Object.

For the Release Operator Override, Release, and Release All commands, if all Command Priorities have been released and a Relinquish Default is not defined, the supervisory controller gives control to the actual hardware. The Setpoint command is supported by N2 protocol only. Note that this command does not work on new controllers.

Table 1. Analog Output Commands
Command Name	Parameters	Description
Adjust	The value to be written to the Present Value. The value must be less than Max Present Value and greater than Min Present Value.	Releases Command Priorities 9 through 15 (Scheduling) and then writes to the Present Value at the Default (16) command priority. The value must be less than Max Present value and greater than Min Present Value. Important: Be aware that an operator Adjust command releases the actions of any processes running to the object in the NxE or FEC controllers that use Priorities 9 through 16. Consider this behavior when creating control strategies. If Local Control is True, this command is rejected. The command is only sent when one of the following conditions is met: NOT Local Control and NOT Out Of Service, or NOT Local Control and after issuing the In Service command.
Disable Alarms	None	Disables all types of alarming: alarm extensions, BACnet intrinsic alarming, and BACnet Event Enrollment objects.
Enable Alarms	None	Enables all types of alarming: alarm extensions, BACnet intrinsic alarming, and BACnet Event Enrollment objects.
In Service	None	Cancels the affect of an Out of Service command and returns the Out of Service attribute to False. The Present Value and Reliability will revert back to the values obtained from the physical hardware output. Note: For BACnet objects, support of this command is dependent on the ability to write the Out Of Service attribute.
Operator Override	The value to be written to the Present Value.	Updates the Present Value at Command Priority Operator Override (8). The Operator Override command sends the specified command to the internal NxE object, which is then only sent to the field device when not Out Of Service.
Out of Service	None	Allows a user to override the object’s hardware output for simulation or other purposes. The Out of Service command changes the Out of Service attribute to True. The Present Value and Reliability no longer track the physical output. No commands are sent to the actual hardware. When the Out of Service attribute is set to False, the current Present Value is sent to the actual hardware. When an Out Of Service command is issued, the NxE does not communicate subsequent changes (operator or system) to the field device. For BACnet objects, support of this command is dependent on the ability to write the Out Of Service attribute.
Release Operator Override	None	Releases Command Priority Operator Override (8) from Present Value.
Release	Attribute name Command priority	Releases the identified Command Priority from the specified attribute and allows the next highest priority to control it.
Release All	Attribute name	Releases Command Priorities 3 through 16 (Default), from the specified, writable attribute. Command Priorities 1 and 2 remain. Important: The Release All command may not cause an immediate return to automatic operation. The Release All command clears all command priorities, including those that come from applications and features. When this happens, the output point goes to its Relinquish Default condition. In some cases, the application or feature may have sent a command that does not match Relinquish Default. In this instance, the output point does not end in the state that the applications or features intended. This situation can cause unexpected operation to occur; for example, a space could overcool or overheat, a fan might run longer than expected, and so on. If an operator has overridden an input, use the Release Operator Override command.
Setpoint	None	Writes the value to the permanent memory of the field device and may change the Present Value if there is no override.
Temporary Override	The value to be written to the Present Value attribute, in addition to the duration of the override in hours and minutes.	Overrides a point temporarily for a specified period of time. After the specified time period passes, the Override is automatically released.