Attributes (Secondary Pump PID) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18
Language
English

The following table describes the attributes used by the Secondary Pump PID modules.

Table 1. Secondary Pump PID Attributes

Name

Type 1

Description

Default Value

Control Status

V

Indicates the current status of the module.

Overridden

Set Name: Control Status

Delay

 

Indicates the duration of the delay timer.

0.0 seconds

Direct Acting

 

Signals the action of the PID (True = Direct Acting and False = Reverse Acting). Direct Acting is used in applications where an increase in the process variable causes the controller’s present value to increase. For example, a direct acting control is temperature control with a cooling coil.

Reverse Acting is used in applications where an increase in the process variable causes the controller’s present value to decrease. For example, reverse acting control is temperature control with a heating coil, flow rate control, or static pressure control applications.

False

Mode

 

Determines the operating mode of the module.

Control

Set Name: Off/Max/Control

Output Overridden

 

Indicates when the actual output controlled by this PID is overridden by a user.

False

Output Position

 

Provides the current Present Value of the output that this controller drives.

0%

Percent Cmd

V

Provides an Analog output to control the single actuator that provides cooling or heating.

0.0%

PID Tuning Reset

 

Causes the PID objects to reset their tuning parameters to the default based on the appropriate Process ID.

Normal

Set Name: PID Tuning Reset

Process ID

 

Specifies the process being controlled. See the PID Pre-Processor for details.

Pump Diff P

Set Name: Process ID

Process Range

 

Indicates the magnitude of the range that the PID process variable traverses as the PID present value varies between its minimum and maximum values. You do not need to configure this attribute except for when the Process ID equals Airflow or Airflow Diff. When this occurs, configure this attribute to the designed maximum flow rate of the controlled device. For other Process ID values, the effective process range is automatically found in the standards table.

40 psi

Process Units

 

Specifies the units for the PID.

psi

Set Name: Unit

Process Variable

 

When commanded to Control, this is the variable under control. This variable is typically connected to the Zone Temperature

10 psi

Setpoint

 

Indicates the desired setpoint for the process variable being controlled (when commanded to Control).

10 psi

State

G

Indicates the state of the device.

Control

Set Name: Off/Max/Control

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