Omron NT21 Reference Manual page 131

Lamps
Reference: Different colors can be set for a lamp's guide characters when ON and OFF, but
The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func-
tions, and it cannot be used for purposes other than system use.
The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.
When a DM Area or EM Area address is specified, add a bit number (00 to 15) to
the end of the word address.
Display of Lamps
Lamps are displayed as follows according to the status of the allocated bit:
0 (OFF): OFF
1 (ON): ON, or flashing
Whether a lamp lights continuously or flashes when the lamp bit is set to 1
(ON) is determined by the ON Type attribute.
Note that the display when the lamp is ON or flashing also changes accord-
ing to the presence or absence of a frame.
When there is a frame: The frame is always displayed.
When there is no frame: The lamp may be invisible when it is OFF depend-
When there is a frame display
(OFF)
Light
Flash
Only the area inside
the frame flashes.
Guide Character Type
The following 4 types of guide characters can be displayed on the PT.
Type
Fixed character The same character string is always displayed regardless of
string the status of the lamp.
ON/OFF switching Different character strings are displayed when the lamp is ON
(or flashing) and OFF. It is also possible to display more than
one line of guide characters.
Numeral display The contents of a numeral memory table entry are displayed
in real time as the lamp's guide characters.
Character string The contents of a character string memory table entry are
display displayed in real time as the lamp's guide characters.
The guide character settings for each guide character type are as follows:
Fixed Character String Settings
The settings are the same as the settings for the fixed display's character
strings except that multiple lines and their alignment (left, center, or right) can
be specified.
For details on displaying multiple lines and specifying alignment, refer to Dis-
playing Multiple Lines of Guide Characters on page 116. For details on other
properties, refer to 2-4-2 Text (Fixed Display).
the background color is always transparent.
ON/OFF Switching Character Settings
Different character strings can be specified for display when the lamp is ON
(lamp bit ON) and OFF (lamp bit OFF). It is also possible to specify different
ing on the OFF color.
When there is no frame display
(OFF)
Light
Flash
Lamp alternates
between displayed and
not-displayed states.
Description
Section 2-6
115