KEYENCE LS-7600 - Manual (Page 60)

4-10
Chapter 4 Operation Control
4
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 LCD monitor will display “– – –. – – – –.”)
The automatic zero value will not be lost after the LS-7600 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/Remote control console
• External terminal
• RS-232C interface
Tips
■ Control Panel/Remote Control
Console
If a single measured value is displayed, an
automatic zero setting will be made for the
corresponding OUT number only.
If both measured values are displayed, an
automatic zero setting will be made for the
selected OUT number on the screen.
1
Press the [ZERO] key once. Automatic
zero will be set.
To cancel the setting, press the [ZERO]
key again.
■ External I/O Terminal
Automatic zero will be set by short-circuiting the ZERO, and COM terminals on the rear
panel of the controller together. Refer to Section 7 I/O Terminals on page 7-1 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 8-
11 for details.
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 3-4 for an
application example. Refer to Offset on page 5-43 for the offset function in
detail.
OUT1
0.00000
UPPER 1.00000
STANDARD 10.00000
LOWER
–1.00000
CAM1
RUN
P – 00
01/02/18
17:50:42
ZERO
Tips