KEYENCE LS-7000 - Manual (Page 50)

3-6
Chapter 3 Operation Control
3
Automatic Zero Function
The automatic zero function sets measured values to zero (0.00000) instantly. This function
is convenient for zero-point calibration for a variety of targets. Furthermore, master calibra-
tion is possible by using this function in combination with the offset function.
Note: This function will not be available while the controller is awaiting the result of
measurement, during which the monitor will display “– – –. – – – –.”)
Tips The automatic zero value will not be lost after the LS-7000 Series is turned
off. The automatic zero value for each program will be stored.
Automatic zero settings are made through the following functional components.
• Control panel
• External terminal
• RS-232C interface
■ Control Panel
When only the OUT1 or OUT2 measured value is displayed, auto zero setting is made
for the displayed value. If both OUT1 and OUT2 values are displayed, auto zero setting
is made for both values.
Press the ZERO key on the control panel.
Press the ZERO key again to cancel the auto
zero setting.
AREA DISP
HOLD
ZERO
■ External I/O Terminal
Auto zero setting is made by short-circuiting the ZERO and COM terminals on the rear
panel of the controller. Refer to Section 6 I/O Terminals on page 6-1 for details.
Note: Automatic zero cannot be canceled through the external I/O terminals.
■ RS-232C Interface
Commands sent by external devices through the RS-232C interface make it possible to
set or cancel the automatic zero function. Refer to Automatic Zero ON/OFF on page 7-
10 for details.
Tips Master Calibration with Offset Function (Automatic Offset Function)
Set the size of a master workpiece to an offset value and make an automatic
zero setting while measuring the master workpiece. Then the size of the
master workpiece will be displayed as an offset value. Refer to Measurement
of Outer Diameter and Width (with Two Measuring Heads) on page 2-4 for an
application example. Refer to Offset on page 4-43 for the offset function in
detail.