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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
1498
17
Function library
17.1
Function blocks | L_SampleHold_1
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17.1.150
L_SampleHold_1
This FB can save a signal.
• The saved value is also available after mains switching.
Inputs
Outputs
Function
• When
bLoad
= TRUE, the
nIn_a
signal is switched to
nOut_a
.
• When
bLoad
= FALSE, the last-valid value is saved and output at
nOut_a
. A signal change at
nIn_a
does not cause a change at
nOut_a
.
Behaviour after mains switching
The last-loaded value is permanently stored after switching of the supply voltage and reloaded after
restart.
• In order that the saved value is not immediately overwritten with the current input signal at
nIn
after restart,
bLoad
must be set to FALSE at restart.
Designator
Data type
Information/possible settings
nIn_a
INT
Input signal
bLoad
BOOL
Save input signal
FALSE The last-valid value at
nIn
is saved and output to
nOut
. A signal
change at
nIn
does not cause a change at
nOut
.
TRUE The
nOut
output provides
dnIn
.
Designator
Data type
Value/meaning
nOut
INT
Output signal
/ROGB
E/RDG
Q,QBD
6 +
Q2XWBD