Carrier 33ZCVAVTRM Specifications download pdf (Page 232)

These are the proportional (P Term), integral (I Term) and derivative

(D Term) terms for the equations that follow:

P Term = (Error

* Proportional Gain)

I Term = (Error

* Integral Gain) + Previous I Term

D Term = (Current Error

- Previous Error

) * Derivative Gain

All single loop algorithms use the following equation:

Output Signal = P Term + I Term + D Term + Starting Value

Note: Output Signal will not exceed the minimum and maximum

output values configured for the algorithm.

All dual loop algorithms use the following master and submaster

equations.

Master PID Equation:

Submaster Reference = P Term + I Term + D Term + Starting Value

Note: Submaster Reference will not exceed the minimum and

maximum SubRef values configured for the algorithm.

Submaster Equation:

Output Signal = (Error

* Submaster Proportional Gain) + Center

Value

Note: Output Signal will not exceed the minimum and maximum

output values configured for the algorithm.

Before you begin tuning the loop, check out the system and verify

the following:

1. There are no mechanical or electrical problems with the

controls or the controlled equipment. Devices such as valves,

dampers, and sensors must be operating properly.

System Checkout

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Carrier 33ZCVAVTRM Specifications Page 232