Lenze DDS Global Drive PLC Developer Studio Instrukcja Użytkownika Pobierz pdf (Strona 14)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.1 Digital frequency ramp generator (L_DFRFG)

2−4

LenzeElectricalShaft.lib EN 1.2

2.1.1.3 Ramp generator stop

Maintains the state of the profile generator during operation.

· Select the constant FIXED0% (selection number 1000) using bStop_b = TRUE, the function

ramp generator stop" is activated.

· The latest state is output at nOut_v (16384 º 15000 rpm).

· The set phase−angle detected at nIn_v is stored.

· After reset of the Quickstop request, the set phase−angle is approached via the profile

generator.

n I n _ v

n M a x S p e e d

b S t o p _ b

n O u t _ v

Abb. 2−5 Diagram of the function ramp generator stop"

2.1.1.4 RESET

bReset_b= TRUE:

· Resets the setpoint phase which has been internally summed up.

· Activates the profile generator.

A TRUE−FALSE edge at bReset_b detects the set phase−angle.

2.1.1.5 Detect phase difference

Monitoring the phase−angle difference between nIn_v and nOut_v.

· Select the constant FIXED0% (selection number 1000) using dwThresholdFollowingError to

adjust the limit for the monitoring (1 º 1 incr.).

· If the monitoring is triggered, then bFail_b is set = TRUE.

· Select the constant FIXED0% (selection number 1000) using bReset_b = TRUE to store the

signal.

· The profile generator can accept a phase−angle difference of up to ±2140000000 incr.

(» 32000 turns) (65536 º 1 turn).

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Lenze DDS Global Drive PLC Developer Studio Instrukcja Użytkownika Strona 14