State transition definitions – Echelon LonPoint Application and Plug-In User Manual

Page 119

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The LonPoint Application and Plug-in Guide

10-17

6

HVAC_OFF

Controller not controlling outputs

7

HVAC_TEST

Equipment being tested

8

HVAC_EMERG_HEAT

Emergency heat mode (heat pump)

9

HFAC_FAN_ONLY

Air not conditioned, fan turned on

255

HVAC_NUL

Value not available

4. Click the corresponding entry in the Digital Output Values column and type

the names of all the digital output network variables that should be on after
this transition. The digital outputs are all SNVT_switch values, and you will
specify each as either On or Off.

When you are finished defining a State Definition shape, close the State
Definitions shape drawing window.

Following is an example State Definitions shape. This shape defines the state
transitions for the stUnoccupied state of the example described in Drawing a
State Machine Bubble Diagram
earlier in this chapter.

stUnoccupied

cndOccupied

stOccupied

HVAC_AUTO

oOccupied On
oSystemEnable On

cndStartWarmup

stWarmup

HVAC_MRNG_WRMUP

oOccupied On
oSystemEnable On

cndEmergency

stEmergency

HVAC_EMERG_HEAT

oSystemEnable On

cndSystemOff

stOff

HVAC_OFF

Exit Condition

Next State

State Transition Definitions

Mode_Out Value

State Name:

1. Use an additional Transition Definitions shape for each State.
2. Use up to 4 Transition Definitions shapes per state.

Digital Output Values

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