Lenze EVS9332xS Bedienungsanleitung PDF herunterladen (Seite 195)

Function library

Function blocks

3.2.48 Process controller (PCTRL1)

3−143

EDSVS9332S−EXT EN 2.0

3.2.48.1 Control characteristic

l In the default setting, the PID algorithm is active.

l The D−component can be deactivated by setting code C0224 to zero. Thus, the controller

becomes a PI−controller (or P−controller if the I−component is also switched off).

l The I−component can be switched on or off online via the PCTRL−I−OFF input. For this, the

input is assigned a digital signal source (e.g. one of the freely assignable digital input

terminals). If the I−component is to be switched off permanently, the input is assigned the

signal source "FIXED1".

– PCTRL−I−OFF = HIGH switches off the I−component

– PCTRL−I−OFF = LOW switches on the I−component

l The reset time is parameterised via C0223.

l The P−gain can be set in different ways. The function providing the P−gain is selected under

C0329:

– C0329 = 0

The P−gain is entered under C0222.

– C0329 = 1

The P−gain is entered via the PCTRL−ADAPT input. The input value is led via a linear

characteristic. The slope of the characteristic is set under C0222 (upper limit) and C0325

(lower limit). The value under C0222 is valid if the input value = +100 % or −100 %. The value

under C0325 applies if the input value is 0 %.

100 %

PCTRL−ADAPT

Input data:

= C0222

= C0325

Display value:

pact

= C0336

Fig. 3−128 Input of the P−gain via PCTRL−ADAPT input

– C0329 = 2

The P−gain is derived from the process setpoint PCTRL−SET. The setpoint is measured after

the ramp function generator and calculated by means of a characteristic with three

interpolation points.

Input data:

= C0222

= C0325

= C0326

= C0328

= C0327

Display value:

pact

= C0336

Fig. 3−129 P−gain derived from the PCTRL−SET process setpoint

– C0329 = 3

The P−gain is derived from the control difference and calculated by means of a characteristic

as for C0329 = 2.

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