KEYENCE LK-G Series - Manual (Page 87)

3-29
3
LK-G-M-NO3-E
3 Function Settings
■ Sample-and-hold (Trigger 1)
• The internal measurement value when the TIMING input becomes ON is retained and outputted.
• In the following cases, the comparator standby status ("------" is indicated) is displayed until the first
measured value is fixed.
When the power is turned on/when the setting is changed/when the program No. is changed/
when RESET is inputted/when auto-zero is inputted
• The comparator output is outputted according to the measurement value.
• The ON state of each output indicates the state where the NPN or PNP open-collector output is turned
on.
• The ON state of each input indicates the state where it is short-circuited between the terminal and the
COM terminal for NPN type, and the voltage is applied between the terminal and the COM terminal for
PNP type.
• The RS-232C output is synchronized with the timing input when "Auto transmission" in the Environment
setting is set other than OFF. (page 3-49)
The TIMING input and RESET input can be controlled using the RS-232C (page 5-8).
When the mode is set without the alarm hold, and a large value is set for the average number of times,
the measurement result may not trigger an alarm. Check the alarm output to ensure that the alarm
state is properly recognized.
Sample-and-hold measurement value
Internal measurement value
Comparator
Measurement
value
Measurement
value
Measurement
value
Measurement value Measurement value Measurement value
Comparator Comparator
t
RESET
process
ON
OFF
TIMING input
Comparator standby
(------ display)
Measurement value
ON
OFF
RESET input
ON
OFF
Comparator output
Binary output
RS-232C output
------- -------
Reference
Note