Attributes (Capacity Calculation) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool

Attributes (Capacity Calculation) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Product

Controls > Control Tools > 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 Capacity Calculation modules:

Table 1. Capacity Calculation Attributes
Module	Type ¹	Description	Default Value
Device n Rated Capacity		These values are the rated or name plate data for the device entered by the user before commissioning. These inputs are used to calculate the operating capacity when the Input Type is either Rated Flow or %FLA, and the inputs are always used to calculate the available capacity regardless of the Input Type. The module is created with n individual Device n Rated Capacity inputs based on Number of Devices. (Where n is 1-8.)	100 Amps
Device n Running Capacity		These values are measured values either entered through a sensor or a network variable. These inputs are used to calculate operating capacity when the Input Type is either Measured Flow, Amps, or %FLA. If an input is unreliable, the corresponding value for the input is forced to zero. The module is created with n individual Device n Running Capacity inputs based on Number of Devices. (Where n is 1-8.)	0.0 Amps
Device n Usage		These values indicate the availability of the controlled device. When On, the command to the device is currently on. When Available, the device is off but could be commanded on. When Unavailable, the device is off and cannot be used. The device could be unavailable because the maintenance switch has the device disabled or the status did not match the command after the Disable Delay Time value. These values are used to calculate the operating capacity and the available capacity. The module is created with n individual Device n Usage inputs based on Number of Devices. (Where n is 1-8.)	Unavailable Set Name: Usage
Operating Capacity	G	This value is the sum of capacities of devices which are on. This value can be used by other modules to determine if additional pumping capacity is needed when a chiller is added. The user may calculate remaining capacity by subtracting Operating Capacity from Available Capacity.	0.0 Display Units: Amps
Available Capacity		This value is the sum of capacities of devices which are either on or available. This value can be used by other modules to determine if enough pumping capacity is available to allow a chiller to be added.	0.0 Amps
Input Type		This input indicates whether rated flow, measured flow, Amps or %FLA is used in the capacity calculations.	Amps Set Name: Capacity Calculation

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