Schneider Electric Altivar 58 VW3-A58101 Manual do Utilizador descarregar pdf (Página 64)

ALTIVAR

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58 Keypad Display VVDED397047US R8/01

Chapter 2 — Menus 08/01

Auto-tuning

When the assigned logic input changes to 1 an auto-tuning operation is

triggered, in the same way as parameter TUN in the 3

—Drive menu.

Auto tuning is only performed if no command has been activated. If a

Freewheel Stop or Fast Stop function is assigned to a logic input, this

input must be set to 1 (active at 0).

Encoder Inputs

(Only with an I/O extension card with encoder input, VW3A58202U)

Speed Regulation

The inputs can be used to connect an encoder for improving speed

regulation in applications where the load is changing. To program the

encoder speed feedback, configure AI3 in the 5

—I/O menu for RGI:

Encoder Feedback. Then configure the encoder type and number of

pulses in the 3—Drive menu.

The A, A-, B, and B- inputs on the I/O option card are for use in forward

and reverse directions.

The A input can also be used with an inductive sensor of a photoelectric

detector for simplified, but less accurate regulation.

Summing Speed Reference

The setpoint from the encoder input is summed with AI1.

Using the Analog Inputs

The AI1 input is set for speed reference unless the PI Regulator function

is enabled. In this case, AI1 is used for the set point reference. The

possible assignments of AI2 and AI3 are Speed Reference Summing and

PI Regulator.

Speed Reference Summing

The frequency references at AI2 and AI3 can be summed with that at AI1.

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Schneider Electric Altivar 58 VW3-A58101 Manual do Utilizador Página 64