Primary States (2 Pipe Proportional Valve) - 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

Cooling Mode

The following cooling modes are only active when the SummerWinter input is set to Summer.

  • Off: Set the Percent Cmd to 0%. The state is Off.

  • Max: Set the output for maximum cooling. The Heating Percent Cmd is set to 0% and the Cooling and Percent Cmds are set to 100% if in Summer mode. The state is Max Cooling.

  • Limited Max: Set the output for maximum cooling with a limit. Similar to the Max Cooling command except the maximum value is specified by the user through the Limited Max Value input. The state is Limited Max Cooling.

  • Water Flush: Set the output to the Flush Position value. The state is Water Flush Cooling.

  • Hold: Hold the Percent Cmd output at its current value. The state is Hold. If the Output Overridden is true, then the Output Position input is passed to the Cooling Percent Cmd.

  • Control: Adjust the output to control the Process Variable (cooling only). If in Summer mode and the Process Variable is reliable, the module controls the output to maintain the process variable at the Cooling Setpoint. The state is Control Cooling.

  • Failsoft: The state generation section can use this if the process variable is unreliable, the output is set to the Failsoft Cooling Value. The state is Failsoft Cooling.

Heating Mode

The following heating modes are only active when the SummerWinter input is set to Winter.

  • Off: Set the Percent Cmd to 0%. The state is Off.

  • Max: Set the output for maximum heating. The Cooling Percent Cmd is set to 0% and the Heating and Percent Cmds are set to 100% if in Winter mode. The state is Max Heating.

  • Limited Max: Set the output for maximum heating with a limit. Similar to the Max Heating command except the maximum value is specified by the user through the Limited Max Value input. The state is Limited Max Heating.

  • Water Flush: Set the output to the Flush Position value. The state is Water Flush Heating.

  • Hold: Hold the Percent Cmd output at the current value. The state is Hold. If the Output Overridden is true, then the Output Position input is passed to the Cooling Percent Cmd.

  • Control: Adjust the output to control the Process Variable (heating only). If in Winter mode and the Process Variable is reliable, the module controls the output in order to maintain the process variable at the Heating Setpoint. The state is Control Heating.

  • Failsoft: The state generation section can use this if the process variable is unreliable, the output is set to the Failsoft Heating Value. The state is Failsoft Heating.

Table 1. 2 Pipe Proportional Valve Command Hierarchy

SummerWinter

Cooling Mode

Heating Mode

PID Tuning Reset

State

*

Hold

*

Reset 1st PID

Control Cooling

Hold

Reset 2nd PID

Control Heating

*

Hold

Reset 1st PID

Control Cooling

Hold

Reset 2nd PID

Control Heating

Winter

*

Off

*

Off

Max

Max Heating

Limited Max

Limited Max Heating

Hold

Hold

Waterflush

Water Flush Heating

Failsoft

Failsoft Heating

Control

Control Heating

Summer

Off

*

Off

Max

Max Cooling

Limited Max

Limited Max Cooling

Hold

Hold

Waterflush

Water Flush Cooling

Failsoft

Failsoft Cooling

Control

Control Cooling