Lenze DDS Global Drive PLC Developer Studio Manual de usuario descargar pdf (Pagina 12)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.1 Digital frequency ramp generator (L_DFRFG)

2−2

LenzeElectricalShaft.lib EN 1.2

Parameter codes of the instances

VariableName L_DFRFG1 SettingRange Lenze

dwTir C0751 0.001 ... 999.900 s 1.000

nMaxSpeed C0752 1 ... 16000 rpm 3000

dwTifForQSP C0753 0.000 ... 999.900 s 0.000

dwThreshold

FollowingError

C0754 10 ... 2000000000 incr. 2000000000

wSynWindow C0755 0 ... 65535 incr. 100

dnOffset C0756 −2147483647 ... 2147483647 incr. 0

byFunction C0757 0, 1 0

bySpeedDirection C0766 1 ... 3 1

Range of functions

· Profile generator

· Quickstop

· Ramp generator stop

· RESET

· Detect phase difference

· Set offset

· Connection of the function block

Note!

This FB operates with remainder handling.

2.1.1.1 Profile generator

n I n _ v

n M a x S p e e d

d w T i r d w T i r

w S y n W i n d o w

b S y n c _ b

n O u t _ v

Abb. 2−2 Diagram of the synchronization of L_DFRFG

The profile generator generates ramps which lead the setpoint phase to its target.

· Use dwTir to set the ramp−up and ramp−down times (1000 º 1 s).

· Use nMaxSpeed to set the maximum speed (17476 º 16000 rpm).

· If the distance and the speed reach their setpoints, the output switches bSync_b = TRUE. At

the same time, the FB switches the profile generator inactive and nIn_v is output to nOut_v.

· Use wSynWindow to set the changeover point for bSync_b (1 º 1 incr.).

Stop!

Do not operate the drive at the torque limit with this function

max

, I

max

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 44 45

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Lenze DDS Global Drive PLC Developer Studio Manual de usuario Pagina 12

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