Lenze DDS Global Drive PLC Developer Studio Manual do Utilizador descarregar pdf (Página 11)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.1 Digital frequency ramp generator (L_DFRFG)

2−1

LenzeElectricalShaft.lib EN 1.2

2 Function blocks

2.1 Special functions

2.1.1 Digital frequency ramp generator (L_DFRFG)

This FB synchronizes the drive (motor shaft) to a digital frequency (phase−angle input). The drive then

runs in phase−synchronism with the digital frequency.

L _ D F R F G

C T R L

S Q

d w T i f F o r Q s p b y S p e e d D i r e c t i o n

d w T i r d n O f f s e t

b y F u n c t i o n w S y n W i n d o w

n M a x S p e e d

d w T

h r e s h o l d F o l l o w i n g E r r o r

b S y n c _ b

n O u t _ v

b F a i l _ b

n I n _ v

b Q S P _ b

b S t o p _ b

b R e s e t _ b

d n S e t T P L a s t S c a n _ p

b S e t T P R e c e i v e d _ b

T P / M P -

C t r l

Abb. 2−1 Digital frequency ramp generator (L_DFRFG)

VariableName

DataType SignalType VariableType Note

bSetTPReceived_b Bool binary VAR_INPUT Zero−pulse or TP (TouchProbe) received

dnSetTPLastScan_p Double Integer position VAR_INPUT Difference increments between TP and start of the

task

nIn_v Integer velocity VAR_INPUT Speed/phase−angle setpoint (16384 º 15000 rpm)

bQSP_b Bool binary VAR_INPUT TRUE = Quickstop

bStop_b Bool binary VAR_INPUT TRUE = save setpoint

bReset_b Bool binary VAR_INPUT TRUE = reset

bSync_b Bool binary VAR_OUTPUT TRUE = drive runs synchronously

nOut_v Integer velocity VAR_OUTPUT Speed/Phase setpoint

bFail_b Bool binary VAR_OUTPUT TRUE = exceeded phase−angle difference

dwTir Double Word − VAR CONSTANT RETAIN Acceleration time

nMaxSpeed Integer − VAR CONSTANT RETAIN max. rate of catching up

dwTifForQSP Double Word − VAR CONSTANT RETAIN Deceleration time for QSP (Quickstop)

dwThreshold

FollowingError

Double Integer − VAR CONSTANT RETAIN Second contouring error

(65335 º 1 turn)

wSynWindow Word − VAR CONSTANT RETAIN Synchronization window

dnOffset Double Integer − VAR CONSTANT RETAIN Offset related to the digital frequency input

(65335 º 1 turn)

byFunction Byte − VAR CONSTANT RETAIN Start with/without TP

bySpeedDirection Byte − VAR CONSTANT RETAIN Input of the direction of rotation

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 44 45

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