Lenze EVS93 Series, Системное руководство

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Function library
Function blocks
3.2.87 Sample and hold function (S&H)
3−281
l
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
l
With S&H1−LOAD = HIGH the signal at the input S&H1−IN is switched to the output
S&H1−OUT.
l
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:
l Keep S&H1−LOAD at LOW level when disconnecting the supply voltage (mains, DC bus or
terminal 59).
l Keep S&H1−LOAD at LOW level when connecting the supply voltage (mains, DC bus or
terminal 59).