Primary States (Humidification Staged Outputs) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 13.1

Controller Tool Help

Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
13.1
Revision date
2019-12-04
  • Off: Set Humidity Percent Cmd to 0% and turn off all the stages, but observe the minimum on and off timers.

  • Instant Shutdown: Turn everything off, do not observe minimum on and off timers.

  • Hold: Holds the outputs at their current position. If the Output Overridden is true, then the Output Position input is passed to the Valve Percent Command.

  • H Control: When operating in the H Control mode, the activity attempts to control the process variable (either return humidity or zone humidity) to the setpoint. As the humidity drops below the setpoint, the analog percent output Humidity Percent Cmd increases, which with the intervention of the MSC module causes the controlled devices to remain on longer and/or turn on more devices.

  • Limited H Control: When operating in the Limited H Control mode, the activity attempts to control the discharge humidity to the setpoint. As the humidity rises above the setpoint, the analog percent output Humidity Percent Cmd decreases, which with the intervention of the MSC module causes the controlled devices to remain on less time and/or turn off more devices. This mode is the humidity high limit mode and is intended to prevent the discharge air from becoming too humid.

Table 1. Humidification Staged Output Command Hierarchy

Mode

PID Tuning Reset

State

Off

*

Off

Instant Shutdown

*

Instant Shutdown

H Control

*

H Control

Limited H Control

*

Limited H Control

Hold

Reset 1st PID

Limited H Control

Hold

*

Hold

Table 2. Staged H Control Command Hierarchy

Mode

PID Tuning Reset

State

Off

*

Off

Instant Shutdown

*

Instant Shutdown

H Control

*

H Control

Limited H Control

*

Limited H Control

Hold

Reset 1st PID

Limited H Control

Table 3. Staged Limited H Control Command Hierarchy

Mode

State

Off

No Limit Control

Instant Shutdown

No Limit Control

H Control

No Limit Control

Limited H Control

Limited H Control

Hold

Hold