KEYENCE LK-G Series User Manual
Page 53
2-7
2
LK-G-M-NO2-E
2 Operations and Functions during Measurement
■
Operations from the display panel
1
Measure the target to be used as a reference.
Assume that "
1.2345
" is displayed.
2
Press the
key.
The measurement value display becomes zero.
• If you enable the auto-zero function for either OUT1 or OUT2 independently, the
measurement value display mode must be set to the single display.
• If you enable the auto-zero function for both OUT1 or OUT2 at the same time, the
measurement value display mode must be set to the dual display.
• The measurement value at the moment when the
key is released is set as
"
0.0000
".
• Pressing the
key for three seconds cancels auto-zero.
■
Input from the ZERO terminal
Auto-zero is activated for OUT1 when ZERO1 (Terminal 10) on the 12-pin terminal block
receives an input and for OUT2 when ZERO2 (terminal 8) on the expansion connector
receives an input. Ensure that the turn-on time does not exceed two seconds.
• NPN type : OFF when opened/ON when short-circuited with COM (No.12)
• PNP type : OFF when opened/ON when the voltage is applied
The measurement value at the turning-on moment is set as "
0.0000
".
If the ZERO1 terminal or the ZERO2 terminal is turned on for two seconds or more, auto-
zero is canceled.
■
RS-232C interface
You can send the command from the external devices by using the RS-232C interface to set or
cancel the auto-zero function.
Refer to "Switching the Measurement Value Displays" (page 2-2) for switching the
measurement value display.
Refer to "Chapter 5 RS-232C" (page 5-1).
OUT1
HI
GO
LO
HI
GO
LO
TIM
OUT2
TIM
OUT1
HI
GO
LO
HI
GO
LO
TIM
OUT2
TIM
Reference
Reference