Lenze DDS Global Drive PLC Developer Studio Bedienungsanleitung PDF herunterladen (Seite 25)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.2 Digital frequency processing (L_DFSET)

2−15

LenzeElectricalShaft.lib EN 1.2

· In dnPosDiffOut_p the calculated phase−angle difference is given out, and can, if appropriate,

be assigned to a phase−angle controller (e.g. for the system variables MCTRL_dnPosSet_p of

the 9300 Servo PLC).

· In dnPosSetOut_p path information is given out from the setpoint integrator.

· The actual−value and setpoint integrators can be set to 0 by bResetAllIntegrators_b = TRUE,

whereby dnPosDiffOut_pand dnPosSetOut_p are set to 0.

· By using bSetIntegrator_b = TRUE, the actual−value and setpoint integrators are set to be the

same.

If a FALSE−TRUE transition occurs at bSetIntegrator_b then dnPosDiffOut_p is set = 0.

bSetIntegrator_b has a higher priority than bResetAllIntegrators_b.

2.1.2.5 Process−monitoring functions

Contouring (following) error (bFollowingErr_b = TRUE)

The monitoring reacts if the drive is not able to follow its set phase, because e.g.

· the centrifugal mass is too large for the set acceleration or deceleration time

· the torque limit is reached (load torque > drive torque)

Remedy:

· Unload drive

· increase torque limit at the servo controller (if the power limits of the controller are not yet

achieved)

The monitoring is derived from the phase difference of set−value integrator minus actual phase

integrator. The comparison value (contouring error limit) dwFollowingErrWin) can be set by a

parameter variable.

Phase−angle controller overflow (bPosOverflow_b = TRUE)

If this monitoring reacts, the phase deviation which can be represented internally, is exceeded.

Homing points are lost.

Tip!

If a TRIP is to be triggered, then the status of the appropriate variable must be passed on to the SB

DCTRL_DriveControl, so that an external TRIP can be triggered with its help.

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Lenze DDS Global Drive PLC Developer Studio Bedienungsanleitung Seite 25