Lenze DDS Global Drive PLC Developer Studio - Manual (Page 11)

Function block library LenzeElectricalShaft.lib
Special functions
2.1.1 Digital frequency ramp generator (L_DFRFG)
2−1
L
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
R
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