Setting
up Compax3
Positioning via digital I/Os
184
192-120101 N11 C3I11T11 November 2007
4.4.4.
Signal filtering with external command value
The command signal read in from an external source (via HEDA or physical input)
can be optimized via different filters.
For this the following filter structure is available:
C3SM Wizard
Structure
of Cam or
Gearing
HEDA
TRF
interpolation
500µs => 125µs
interpolation
500µs => 125µs
interpolation
500µs => 125µs
Control
structure
681.4
682.4
680.4
2110.4
2110.3
TRF
2107.1
TRF
2109.1
+/-10V
position
speed
accel
s
p
e
e
d
a
c
c
e
l
3920.1
3920.7
2020.6
2020.7
2011.1
2011.2
accel
speed
680.10
2020.1
680.12
2110.1
TRF
2110.1
Trackingfilter
The displayed filter influences all outputs of the tracking filter.
Number
: Object number of the filter characteristic
Differentiator
Output signal = d(input signal)/dt
The output signal is the derivation (gradient) of the input signal
Filter
Number
: Object number of the filter characteristic
interpolation
500µs => 125µs
Interpolation
Linear Interpolation.
Values in the 500µs grid are converted into the more exact time
grid of 125µs.
Note:
The objects 2020.6 and 2020.7 are status values, which can be used for control
purposes in the IEC program.
The objects 680.12, 681.4 and 682.4 are input characteristics which can also be
found in the controller structure.
A command jerk setpoint generator is not required for an external command
value.
The description of the objects can be found in the object list.