KEYENCE LK-G Series User Manual

Page 53

2-7

LK-G-M-NO2-E

2 Operations and Functions during Measurement

■

Operations from the display panel

Measure the target to be used as a reference.

Assume that "

1.2345

" is displayed.

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

TIM

OUT2

TIM

OUT1

TIM

OUT2

TIM

Reference