Sample And Hold Function (S&H) - Lenze 9300 Series System Manual

Function library
Function blocks
3.5.57 Sample and hold function (S&H)
3.5.57 Sample and hold function (S&H)
Purpose
The FB can save analog signals. The saved value is also available after mains switching.
Fig. 3−196 Sample and hold function (S&H1)
Name
S&H1−IN
S&H1−LOAD
S&H1−OUT
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).
3−248
C0570
C0571
Signal
Type DIS DIS format
a C0572 dec [%]
d C0573 bin
a − −
EDSVS9332P−EXT DE 2.0
S&H1
S&H1-IN
S&H1-OUT
S&H
C0572
S&H1-LOAD
C0573
Source
CFG List Lenze
C0570 1 1000
C0571 2 1000
− − −
Note
LOW = save
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