Attributes (Balancer Override) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool

Attributes (Balancer Override) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Product name

Controller Configuration Tool

Document type

User Guide

Document number

LIT-12011147

Version

16.0

Revision date

2023-10-02

The following table describes the attributes used by the Balancer Override modules.

Table 1. Balancer Override Attributes
Name	Type ¹	Description	Default Value
Balancer Override Common Attributes
Autocal Status	SC, V	Contains the status of the application with respect to Autocalibration.	Set Name: False/True/Fault
Autocalibrate Now	SC	Contains input from the logic handling autocalibration that triggers the Flow Calculation modules to calculate new dP offset values. When this input goes from False to True to False, it indicates that the autocalibration process is complete.	False
Balancer Override	G, V	Specifies the current state of the VAV Balancer module.	Set Name: Balancer Override
Duct Configuration	SC	Indicates the configuration of the duct: Balancer Override SD: Single Duct Balancer Override DD: Dual Duct Balancer Override SDX: Single Duct with Exhaust Balancer Override DDX: Dual Duct with Exhaust	See Description column.
Effective Autocalibrate	SC, V	Triggers autocalibration sequence on receipt of the Start Autocalibration command.
Flow Setpoint Occupancy	SC, V	Specifies the effective occupancy mode for use in calculating flow setpoints. When the Balancer Override output is equal to Normal, the Flow Setpoint Occupancy is set to the current value of the Occupancy input. When the Balancer Override output is equal to any other value (that is, not Normal), the Flow Setpoint Occupancy is set to Occupied.	Set Name: Occ Effective
Network Autocalibrate	SC	Used to manually trigger an autocalibration sequence. The user is responsible for setting (to True) and clearing (to False) the CS input that is typically connected to the Network Autocalibrate input.	False
Occupancy		Current status of the Occupancy Mode for the application.	Occupied Set Name: Occ Effective
Recalculate Gain Status	SC, V	Contains the status resulting from the Recalculate Gain command most recently sent to this module.	Set Name: Recalculate Gain Status
Reliability	SC	Indicates the current reliability status. The Balancer Override modules are always reliable.	Reliable
Settling Time		Specifies the time over which the module averages the flow reading after receiving the Recalculate Gain command.	10 Seconds
Status	SC	Indicates the current status of the module.	Normal
Timeout Delay		Specifies the balancing mode inactivity timer (that is, the amount of time after which to exit balancing mode due to inactivity).	60 Minutes Range: 10-480 Minutes
Balancer Override SD and SDX-Specific Attributes ²
CLG-MAXFLOW (Cooling Max Flow)	V	Maximum flow allowed for Supply Flow.	500 l/s, 1000 cfm
CLGOCC-MINFLOW (Occ Cooling Min Flow)	V	Contains the occupied cooling minimum flow setpoint for Supply Flow.	100 l/s, 200 cfm
HTGOCC-MINFLOW (Occ Heating Min Flow)	V	Contains the occupied Heating minimum flow setpoint for Supply Flow.	100 l/s, 200 cfm
SA-AREA (Supply Area)	V	Area at location of measurement of Supply Flow.	0.0324 sq meter, 0.349 sq ft
SA-KFACTOR (Supply Pickup Gain)	V	Contains the amplification provided by the pitot tube for Supply Flow.	2.00
Supply Flow (Flow 1)	SC	Contains the current flow measurement for Supply Flow.	0.0 l/s, 0.0 cfm
Supply Percent dP Offset (Flow 1 Percent dP Offset)	SC	Percent offset used in calculating Supply Flow.	0.0%
Supply Stroke Time (Flow 1 Stroke Time)	SC	Contains the stroke time of the damper controlling Supply Flow.	60 Seconds
Balancer Override DD and DDX-Specific Attributes
CD Percent dP Offset (Flow 1 Percent dP Offset)	SC	Contains the percent offset used in calculating Cold Deck Flow.	0.0%
CD Stroke Time (Flow 1 Stroke Time)	SC	Stroke time of the damper controlling Cold Deck Flow.	60 Seconds
CD-AREA (Cold Deck Area)	V	Area at location of measurement of Supply Flow.	0.0324 sq meter, 0.349 sq ft
CD-KFACTOR (Cold Deck Pickup Gain)	V	Amplification provided by the pitot tube for Supply Flow.	2.00
CDOCC-MINFLOW (Occ Cold Deck Min Flow)	V	Contains the occupied cooling minimum flow setpoint for Cold Deck Flow.	100 l/s, 200 cfm
CLG-MAXFLOW (Cooling Maximum Flow)	V	Contains the maximum flow allowed for Cold Deck Flow.	500 l/s, 1000 cfm
Cold Deck Flow (Flow 1)	SC	Contains the current flow measurement for Cold Deck Flow.	0.0 l/s, 0.0 cfm
HD Percent dP Offset (Flow 2 Percent dP Offset)	SC	Percent offset used in calculating the Deck Flow.	0.0%
HD Stroke Time (Flow 2 Stroke Time)	SC	Contains the stroke time of the damper controlling the Deck Flow.	0 Seconds
HD-AREA (Hot Deck Area)	V	Area at location of measurement of Supply Flow.	0.0324 sq meter, 0.349 sq ft
HD-KFACTOR (Hot Deck Pickup Gain)	V	Amplification provided by the pitot tube for Supply Flow.	2.00
HDOCC-MINFLOW (Occ Hot Deck Min Flow)	V	Contains the occupied heating minimum flow setpoint for Hot Deck Flow.	100 l/s, 200 cfm
Hot Deck Flow (Flow 2)	SC	Contains the current flow measurement for Hot Deck Flow.	0.0 l/s, 0.0 cfm
HTG-MAXFLOW (Heating Maximum Flow)	V	Contains the maximum flow allowed for Hot Deck Flow.	500 l/s, 1000 cfm
Balancer Override SDX and DDX-Specific Attributes ³, ⁴
EA-AREA (Exhaust Area)	V	Contains the area at location of measurement of Exhaust Flow.	0.0324 sq meter, 0.349 sq ft
EA-KFACTOR (Exhaust Pickup Gain)	V	Contains the amplification provided by the pitot tube for Exhaust Flow.	2.00
Exhaust Flow	SC	Current flow measurement for the Exhaust box.	0.0 l/s, 0.0 cfm
Exhaust Percent dP Offset	SC	Contains the percent offset used in calculating the Exhaust Flow.	0.0%
Exhaust Stroke Time	SC	Contains the stroke time of the damper controlling Exhaust Flow.	0 Seconds
OCCEAFLOW-DIFF (Occ Exhaust Diff)	V	Contains the desired occupied setpoint for the difference between the exhaust and supply (that is, Occ Exhaust Diff = Exhaust Flow - Supply Flow). Positive values result in a negative zone static pressure, while negative values result in a positive zone static pressure. Zero provides matching supply and exhaust flows. Note: You cannot enter a value less than -9999 or greater than 9999. To enter a value outside of these limits, for example 12,000, perform the following workaround. Add a floating network input or constant. Break the connection to the output attribute OCCEAFLOW-DIFF. Connect the Network Input or Constant to the Occ Diff Setpoint or Exhaust Differential Setpoint Calculation module.	100 l/s, 200 cfm

¹ C - Configuration Mode Only, G - Default Element (Generated State, if applicable), SC - Simulation and Commissioning Modes Only, V - Calculated Value (Outputs)

² The Area 2, Flow 2, Flow 2 Percent dP Offset, Flow 2 Stroke Time, Max Flow 2, and Pickup Gain 2 attributes exist in the Balancer Override SD and Balancer Override SDX modules, but are unused. The version 1 instances of these attributes are used for Supply Flow. In the Balancer Override DD and Balancer Override DDX, the version 1 instances of these attributes are used for Cold Deck Flow while the Flow 2 versions apply to the Hot Deck Flow.

³ The attributes specific to the Balancer Override SD also apply to the Balancer Override SDX, and the attributes specific to the Balancer Override DD also apply to the Balancer Override DDX.

⁴ The Balancer Override SDX and Balancer Override DDX attributes listed here also exist in the Balancer Override SD and Balancer Override DD modules, but are unused.