Standard blocks
Block descriptions
ID 441692.01
STÖBER ANTRIEBSTECHNIK
354
100140 PID-controller
Description
The block updates the output signal
Out
with the input signal
Error
using a PID element
(see additional description below). Several initialization modes which can be selected on
the input
/-Set
are available.
The following parameters are used to set the PID controller:
G01
PID-controller k
p
G02
PID-controller k
i
G03
PID-controller k
d
G04
PID-controller upper limit
G05
PID-controller lower limit
G06
PID-controller k
p2
G07
PID-controller low pass, D-Part
Restrictions on accuracy:
Since rounding errors can occur particularly when global kp (
G01
) is multiplied by control
error
Error
, be sure that the tolerable control error is multiplied by
G01
> 65536.
Inputs
No. Name
Datatype Scaling
Description
1
Error
I32
–
Control error (reference value - actual value)
2
Init.Val
I32 –
Preset-value
has different meanings depending on the selection on
the input
Preset
.
3
I-Set
I8 –
0:Standard
; The PID controller output is calculated as for the standard
case: PID=P+I+D
1:Output =I-Part=0
; The PID controller output and the I-Part have 0.
2
:
Output =I-Part=
Init.Val
; The PID controller output and the I-Part
have the value of the input
Init.Val
.
3
:
Output =
Init.Val; I-Part =Output-P
; The PID controller output is held
at the value
Init.Val
. The I-Part is calculated by: I=PID-P.
4
:
Output =PID, I-Part=
Init.Val
; The PID controller output is: PID=P+
Init.Val
+D. The I-Part is held to the value of
Init.Val.
When the presetting violates the set limits, the presetting is adjusted
accordingly to the permissible limit values.
4
Disable
B –
Sets the output to 0 although the block continues working internally.
The value of
Init.Val
becomes the I-Part with the falling edge on 0.
Outputs
No. Name
Datatype Scaling
Description
5
Out
I32
–
Output of the PID controller (variable)
6
Limit+
B
–
Indicates use of limitation to
Limit+
at the moment
7
Limit-
B
–
Indicates use of limitation to
Limit-
at the moment
Содержание POSIDRIVE MDS 5000
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