KEYENCE LS-7000 - Manual (Page 88)

4-36
Chapter 4 Function Settings
4
■ Peak Hold
• Peak hold: The maximum value during the sampling period specified by
external timing input is displayed and output as shown below.
• Bottom hold: The minimum value during the sampling period specified is
displayed and output.
• Peak-to-peak hold: The maximum-to-minimum value during the period specified is
displayed and output.
• Average hold: The average value during the sampling period specified is dis-
played and output.
Peak hold measured value
Internal
measured value
Judgment
Measured value Measured value Measured value
Measured value Measured value Measured value
Judgment Judgment
t
Sampling
period
Sampling period Sampling period RESET
processing
ON
OFF
Timing input
Waiting for judgment
(---------- displayed)
Measured value
ON
OFF
RESET input
ON
OFF
Comparator output
ON
OFF
ON
OFF
BCD output
RS-232C output
Judgment awaiting output
(Comparator waiting output)
Strobe output
• Timing input is OFF during sampling periods. The maximum value during the sampling period immediately
before timing input will be output when the timing input turns ON.
• 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 turns 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
“---.-----.”
• If a workpiece is eliminated during a sampling period and it becomes a
period without the internal measured value obtained, the maximum value of
the rest of the normal measured values will be output.
• 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.
Tips
Note: When the measurement mode is set to Average Hold, set the averaging
number to 1.