87 sample and hold function (s&h), Sample and hold function (s&h), Function library – Lenze EVS9332xK User Manual
Page 309: Function blocks
Function library
Function blocks
3.2.87
Sample and hold function (S&H)
3−281
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EDSVS9332K−EXT EN 4.0
3.2.87
Sample and hold function (S&H)
Purpose
The FB can save analog signals. The saved value is also available after mains switching.
C0572
S&H1
S&H1-OUT
S&H1-IN
C0573
S&H1-LOAD
C0570
C0571
S&H
Fig. 3−227
Sample and hold function (S&H1)
Signal
Source
Note
Name
Type
DIS
DIS format
CFG
List
Lenze
S&H1−IN
a
C0572
dec [%]
C0570
1
1000
S&H1−LOAD
d
C0573
bin
C0571
2
1000
LOW = save
S&H1−OUT
a
−
−
−
−
−
Function
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With S&H1−LOAD = HIGH the signal at the input S&H1−IN is switched to the output
S&H1−OUT.
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With S&H1−LOAD = LOW the output S&H1−OUT is disconnected from the input S&H1−IN and
outputs the value which was last valid.
Saving in the case of mains disconnection:
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Keep S&H1−LOAD at LOW level when disconnecting the supply voltage (mains, DC bus or
terminal 59).
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Keep S&H1−LOAD at LOW level when connecting the supply voltage (mains, DC bus or
terminal 59).