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Special functions

2.7.5 Process controller (L_PCTRL)

2−79

LenzeDrive.lib EN 1.7

2.7.5 Process controller (L_PCTRL)

This FB is used, for instance, as a higher−level controller (dancer position controller, tension

controller, pressure controller, etc.).

Setpoint and actual value are sent to the process controller via the corresponding inputs and

processed according to the selected control algorithm (PID−, PI− or P−algorithm).

L _ P C T R L

± 1 6 3 8 4

R E S E T

n A d a p t _ a

V p 2

V p

n S e t _ a

n A c t _ a

b I n A c t _ b

b I O f f _ b

n I n f l u _ a

d n T i r

d n T i f

s o l l 1 s o l l 2

V p

V p 2

V p 3

n S e t 1 A d a p t

n V p 2 A d a p t

b y P C h a r a c t e r i s t i c

n V p

b B i U n i p o l a r

d n T n

n K d

n O u t _ a

n V p

n V p 2 A d a p t

n V p 3 A d a p t

n S e t 2 A d a p t

n A c t V p

Fig. 2−75 Process controller (L_PCTRL)

VariableName DataType SignalType VariableType Note

nAdapt_a Integer analog VAR_INPUT Gain V

 Value range: ±32767

 You can alter the gain online.

nSet_a Integer analog VAR_INPUT Input of the process setpoint.

 Range of possible values: ±32767

 The rate of change of step−change signals can be

slowed by using the ramp generator (with dnTir

and dnTif).

nAct_a Integer analog VAR_INPUT Actual value input

 Value range: ±32767

bInAct_b Bool binary VAR_INPUT Deactivation of the process controller.

 You can carry out this function online.

bIOff_b Bool binary VAR_INPUT Set I−component to 0.

 You can carry out this function online.

nInflu_a Integer analogs VAR_INPUT Evaluation or suppression of the output signal.

 Value range: ±32767

nOut_a Integer analog VAR_OUTPUT Output signal. Value range ±16384 (bipolar), or

0 ... 16384 (unipolar)

nActVp Integer − VAR_OUTPUT Shows the actual gain.

nVp Integer − VAR CONSTANT RETAIN Gain V

(10  1.0)

dnTn Double integer − VAR CONSTANT RETAIN Integral−action time T

(20  20 ms)

nKd Integer − VAR CONSTANT RETAIN Differential component Kd (10  1.0)

nVp2Adapt Integer − VAR CONSTANT RETAIN Vp2 − process controller adaptation (64  1.0)

nVp3Adapt Integer − VAR CONSTANT RETAIN Vp3 − process controller adaptation (64  1.0)

nSet1Adapt Integer − VAR CONSTANT RETAIN Set1 − process controller adaptation (16384  100.00

nSet2Adapt Integer − VAR CONSTANT RETAIN Set2 − process controller adaptation (16384  100.00

byPCharacteristic Byte − VAR CONSTANT RETAIN Function selection for the provision of the P−gain

dnTir Double integer − VAR CONSTANT RETAIN Acceleration time T

(1000  1.000 s)

dnTif Double integer − VAR CONSTANT RETAIN Deceleration time T

(1000  1.000 s)

bBiUnipolar Bool − VAR CONSTANT RETAIN Value range of the output signal

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 102 103

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Lenze DDS Function library Drive Manual de usuario Pagina 89

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