Schneider Altivar 61 VW3A3502 handleiding

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Schneider

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Handleiding

14 1765272 10/2011

Operating Principle

Compensation for loss of head (up to the version V1.1IE02)

An additional step [Pr adj coeff] (O14) is automatically added to the reference value each time an auxiliary pump is started. These reference

steps compensate for a loss of pressure (loss of head) in the pipework due to an increase in flow rate.

• Compensation for loss of head is active when the [Pr adj coeff] (O14) parameter is other than 0.

• The new PID regulator reference is generated using "PID preset reference 2" [Preset ref. PID 2] (rP2).

The [Preset ref. PID 2] (rP2) parameter is controlled by the pump switching card. It is therefore not possible to use the "PID

preset references" function with the "Compensation for loss of head" function.

Example of using the PID regulator with an internal reference:

• [Internal PID ref.] (rPI) = 400 (internal reference)

• [Min PID feedback] (PIF1) = 200

• [Max PID feedback] (PIF2) = 1000

• [Pr adj coeff] (O14) = 50

Each time an auxiliary pump is started the reference becomes:

- variable pump + 1 auxiliary pump: new reference = 450

- variable pump + 2 auxiliary pumps: new reference = 500

- variable pump + 3 auxiliary pumps: new reference = 550

PID regulator reference

O14

Time

Run

Stop

Auxiliary pump 1

Auxiliary pump 2

Auxiliary pump 3

PID reference

Compensated

PID references

Bekijk gratis de handleiding van Schneider Altivar 61 VW3A3502, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.