Lenze DDS Function library Drive - Manual (Page 53)

Function library LenzeDrive.lib
Processing of phase−angle signals
2.4.6 Integration (L_PHINT)
2−43
L
LenzeDrive.lib EN 1.7
2.4.6 Integration (L_PHINT)
This FB can integrate a speed or a velocity to a phase−angle (path/distance). The integrator can
accept max. ±32000 encoder revolutions.
n I n _ v
b R e s e t _ b
d n O u t _ p
b F a i l _ b
L _ P H I N T
± 3 2 0 0 0
R e v o l u t i o n
I n t e r v a l T i m e
T A S K
Fig. 2−54 Integration (L_PHINT)
VariableName DataType SignalType VariableType Note
nIn_v Integer velocity VAR_INPUT Actual speed value: 16384 º 15000 rpm
bReset_b Bool binary VAR_INPUT TRUE sets the phase−angle integrator = 0 and
bFail_b = FALSE .
dnOut_p Double−integer position VAR_OUTPUT 65536 inc = 1 encoder revolution (Overflow is possible.)
bFail_b Bool binary VAR_OUTPUT TRUE = Overflow occurred.
Range of functions
·
Constant input value
·
Calculation of the output signal
2.4.6.1 Constant input value
dnOut_p
t
-32767 revolutions
-32000 revolutions
+32000 revolutions
+32767 revolutions
bFail_b
t
Fig. 2−55 Function of L_PHINT with constant input value
·
A positive signal at nIn_v is incremented (the counter value is increased at every call of the
function).
·
A negative signal at nIn_v is decremented (the counter value is decreased at every call of the
function).
·
dnOut_p produces the count value of the bipolar integrator.
·
If the count exceeds the value of +32000 encoder revolutions, then
bFail_b switches = TRUE.
·
If the count exceeds the value of +32767 encoder revolutions (corresponds to +2147483647
inc.) there is an overflow, and the count procedure continues from a value of −32768 encoder
turns.