Schneider Electric Altivar 58 VW3-A58101 Instrukcja Użytkownika Pobierz pdf (Strona 67)

VVDED397047US R8/01 ALTIVAR



58 Keypad Display

08/01 Chapter 2 — Menus

Table 20: Definition of PID Regulator Inputs and Adjustments

Input Code Range Description

PID setpoint —

The setpoint to the PID regulator can be provided from one of three

sources:

— via analog input, AI1 (AI2 and AI3 can be set to sum with AI1)

— via preset setpoints defined by logic inputs (as explained in the

table below)

— over a communication network

PID feedback —

The feedback to the PID regulator can be provided from AI2 (0–20 mA

signal) or AI3 (0–10 Vdc voltage signal).

Auto / Manual with

Manual Speed Input

PAU,

PIM

When the PID regulator is configured and a logic input is configured

for Auto / Manual, AI3 is the speed input in manual mode. The PID

regulator function is active in Auto mode. When the logic input is open,

(set to state 0), Auto mode is active and the PID regulator is active.

Manual mode is active when the logic input is closed, (set to state 1).

In manual mode AI3 is enabled and the drive controller responds

proportionally to the speed reference at AI3.

Preset setpoints Pr2, Pr4

0–100% of

process

maximum

Logic inputs can also be used to provide programmable setpoints.

Two or four preset setpoints require the use of one or two logic inputs

respectively.

PID Inversion PIC Yes/No

PID inversion permits an inverted response to the PID

setpoint signal.

(This is also referred to as reverse-acting.) If PIC = No, the motor

speed increases when the error is positive. If PIC = Yes, the motor

speed decreases when the error is positive.

PID proportional gain rPG 0.01–100

PID regulator proportional gain adjusts the scaling of the

PID setpoint

signal.

PID integral gain rlG 0.01–100 s PID regulator integral gain adjustment.

Low pass feedback

filter

PSP 0–10 s

PSP can be used to dampen the feedback signal. If PSP is set to zero,

the ACC and dEC ramps are active. If PSP is > 0, the AC2 ramp is

active. Adjustment of AC2 can be used to refine the response of the

PID loop. The dEC ramp is used on deceleration.

PID Feedback scaling FbS 1.0–100

PID feedback scaling allows adjustment of the maximum value of the

PID feedback signal so that it corresponds to the maximum value of

the PID regulator speed reference.

2 preset setpoints 4 preset setpoints

Assign: LIx to Pr2 Assign: LIx to Pr2, then LIy to Pr4

LIx Reference LIy LIx Reference

Analog reference

Process max.

Analog reference

PI2 (adjustable)

PI3 (adjustable)

Process max.

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 111 112

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