Keyence LS-7000 Manual de usuario Pagina 90

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4-38
Chapter 4 Function Settings
4
Sample Hold 1
The instantaneous value at the time specified by external timing input is displayed, and
the value is output as shown below.
Sample hold measured value
Internal
measured value
Judgment
Measured value Measured value Measured value
Measured valueMeasured valueMeasured value
Judgment Judgment
t
RESET
processing
ON
OFF
Timing input
Waiting for judgment
(---------- displayed)
Measured value
ON
OFF
RESET input
ON
OFF
Comparator output
ON
OFF
ON
OFF
Strobe output
BCD output
RS-232C output
Judgment awaiting output
(Comparator waiting output)
When timing input turns ON, the internal measured value will be held. Then the value will be output.
In the following cases, the monitor will display the result waiting status “---.-----” until the first measured
value is determined.
The LS-7000 is turned on, setting changes are made, program number changes are made, RESET
input is ON, or auto zero is input.
Comparator output turns ON according to the measured value.
In the above chart, the ON status of each output means that NPN open collector output is ON, provided
that it is normally open type. If it is normally closed type, the signal will be inverted.
The ON status of each input means that the input is short-circuited to the COM terminal.
RS-232C output is ON in synchronization with timing input if the D-SEND item as an environment setting is
set to S1 or S2 only. Refer to Data Transmission Mode on page 5-9 for environment settings in detail.
If timing input is ON during reset processing, the monitor will display the result waiting status
“---.-----.”
Timing input and RESET input can be under RS-232C control. Refer to
page 7-8 for details.
Strobe output time can be changed. Refer to Strobe Output Time on page 4-
48 for details.
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