CARLO GAVAZZI WM23-96 - PROGRAMMING Manuel d'utilisateur télécharger pdf (Page 19)

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Useful Information

What’s ASY

Digital outputs

■ How to prevent the programming by key-pad

It is possible to prevent any access to

programming by keypad by modifying the

selector under the power supply slot (see

the drawing on the left), or closing the con-

tact number 1 of the digital input module,

when present.

The variables measured by the instrument are

correct if the polarities of the inputs have been

observed (as shown in the figure below); if not,

measuring and retransmission errors may

occur due to the wrong direction of the current flowing

in the primary / secondary of the connected current

transformer.

■ Setting Examples

Example 1 “Analogue output”: take the measure of a

power consumed up to 100kW, and retransmit it with a sig-

nal from 4 to 20 mA; the module to be used is AO1050 or

AO1026 (single or dual output from 0 to 20mA), the instru-

ment must be set as follows:

• VAr: (variable), W∑ (system active power)

• LoE: (minimum electrical scale) 0.0 K; the K and M mul-

Selector: turn the selector with a little screwdriver.

- Free programming.

- Lock programming.

Gross Automation (877) 268-3700 · www.carlogavazzisales.com · [email protected]

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CARLO GAVAZZI WM23-96 - PROGRAMMING Manuel d'utilisateur Page 19