Lenze DDS Function library Drive - Manual (Page 56)

2.4.7 Integration (L_PHINTK)
Function library LenzeDrive.lib
Processing of phase−angle signals
2−46
L
LenzeDrive.lib EN 1.7
2.4.7.1 Constant input value
3 functions are available, that you can select with byMode.
byMode = 0
The input bLoad_b is level−triggered (TRUE−level).
·
bLoad_b = TRUE
– The integrator is loaded with the value at dnSet_p.
– The FB switches bStatus_b = FALSE.
byMode = 1
The input bLoad_b is edge−triggered (FALSE−TRUE transition).
·
bLoad_b = FALSE−TRUE edge/transition
– The integrator is loaded with the value at dnSet_p and immediately integrated from then on.
– The FB switches bStatus_b= FALSE.
dnOut_p
t
-32767 revolutions
(-) dnCmp
(+) dnCmp
+32767 revolutions
bStatus_b
t
Fig. 2−57 Function of L_PHINTK with constant input value
(+) Variable with positive value
(−) Variable with negative value
·
A positive value at nIn_v is incremented
(the counter value is increased at every call of the function).
·
A negative value 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 +32767 encoder revolutions (corresponds to
+2147483647 inc):
– There is an overflow, and counting continues at the value −32768 encoder turns.
– Switches bStatus_b = TRUE, when a positive preset value is reached at dnCmp.
·
If the count falls below the value of −32768 encoder revolutions (corresponds to
−2147483648 inc):
– There is an overflow, and counting continues at the value +32767 encoder turns.
– Switches bStatus_b = TRUE, when a negative preset value is reached at dnCmp.