14
Time functions
14.1
LEAD ( differentiator )
The differentiator forms the difference quotient according to equation:
( )
(
)
( )
(
)
{
}
[
]
y t
T
T T
y t t
a
x t
x t t
y
s
s
s
1
1
1
1
0
=
+
×
-
+ ×
-
-
+
ts
sampling interval
x1(t)
instantaneous x1
T
time constant
x1(t-ts) previous x1
a
gain
y1(t)
instantaneous y1
y0
output offset
y1(t-ts) previous y1
C
T
T
Ts
=
+
<
1
( differentiation constant )
The complex transfer function reads:
F
a T p
T p
p
( )
=
× ×
× +
1
Inputs/outputs:
Digital input
reset
= 1 causes that y1= y0 and the difference quotient is set to 0.
= 0 starts differentiation automatically.
Analog input
x1
Input variable to be differentiated
Output
y1
Differentiator output
Parameters:
Parameters
Description
Range
Default
a
Gain factor
-29 999...999 999
1
y0
Output offset
-29 999...999 999
0
T
Time constant in s
0...199999
1
Configuration:
Configuration
Description
Value
Default
Mode
Differentiator
operation
Differentiating all changes
0
0
Differentiating only positive changes
dx/dt >0
,
1
Differentiating only negative changes
dx/dt <0
2
9499 040 50611
Time functions
75
LEAD ( differentiator )
Содержание KS 98
Страница 8: ...Description 9499 040 50611 Construction 8...
Страница 10: ...Important technical data 9499 040 50611 Further external in and outputs 10...
Страница 12: ...Versions 9499 040 50611 I O modules for units with modular option c basic card 12...
Страница 14: ...Front view 9499 040 50611 14...
Страница 16: ...Mounting 9499 040 50611 16...
Страница 26: ...Maintenance 9499 040 50611 Further information 26...
Страница 36: ...Scaling and calculating functions 9499 040 50611 LG10 10s logarithm 36...
Страница 74: ...Signal converters 9499 040 50611 MEAN mean value formation 74...
Страница 128: ...KS98 I O extensions with CANopen 9499 040 50611 RM_DMS strain gauge module 128...
Страница 132: ...CSEND Send mod blockno s 21 23 25 27 No 57 132...
Страница 140: ...Description of KS98 CAN bus extension 9499 040 50611 140...
Страница 202: ...Controller 9499 040 50611 Process value calculation 202...