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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
1444
17
Function library
17.1
Function blocks | L_NSet_1
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17.1.118.8 Additional setpoint
Use the
nNAdd_a
input to define an additional value (e.g. a correcting signal) and combine it
arithmetically with the main setpoint
nNSet_a
.
• First, the additional setpoint is led via a ramp function generator with linear characteristic. Its Ti
times can be set in
(acceleration time) and
(deceleration time).
• When the input
bNAddInv
is set to TRUE, the additional setpoint can be inverted before having
an effect on the ramp function generator.
• When the input
bLoad
is set to TRUE, the ramp function generator is set to zero for the
additional setpoint and held there without considering the Ti times. The same applies when the
controller is inhibited.
• The following arithmetic combination of main setpoint and additional setpoint can be selected
:
17.1.118.9 Application example for the additional load function
The motor control of the drive is provided with a function for automatically carrying along ramp
function generators for "jerk-free" setpoint connection. For speed-controlled drive tasks, the
SB outputs the current actual speed value via the
nHlgSetValue_a
output (e.g. in
case of a pulse inhibit, flying restart, controller inhibit).
• In case of a pulse inhibit, the main setpoint generator must be carried along with the current
actual speed value to ensure jerk-free setpoint transfer.
• The actual speed value is carried along automatically if the following wiring is provided:
•
nHlgSetValue_a
nCInhValue_a
•
bHlgLoad
bExternalCINH
Value in C00190
Function
Info
0
nNOut_a
=
nNSet_a
The additional setpoint
nNAdd_a
is
not processed.
1
nNOut_a
=
nNSet_a
+
nNAdd_a
2
nNOut_a
=
nNSet_a
-
nNAdd_a
3
nNOut_a
= (
nNSet_a
*
nNAdd_a
) / 100 %
Internal scaling:
• 100 %
≡
16384
• 1 %
≡
164
4
nNOut_a
= (
nNSet_a
* 1 %) / |
nNAdd_a
|
5
nNOut_a
= (
nNSet_a
* 100 %) / (100 % -
nNAdd_a
)