Omron NT-series Operation Manual page 151

 
When a lamp is overlapped with a memory table display
Lamp OFF
OMRON
Lamp Character-string memory
table display area
Lamp OFF
OMRON
Lamp
Character-string memory
table display area
The guide display message for a lamp is a fixed character-string. If you want to
change the lamp guide display in accordance with some condition, overlap the dis-
play area of a numeral memory table or character-string memory table with the
lamp. However, note that -- as shown below -- different results will be achieved
depending on the timing of the lighting of the lamp and the updating of the memory
table. Bear this in mind when creating the control program.
Example 1 :Lamp lit after the memory table is updated
Lamp OFF
Memory table
updated
Example 2 :Memory table updated while lamp is lit
Lamp turned
ON
The characters are
displayed white on black.
PT
Lamp turned
ON
Lamp ON
OMRON
Memory table
updated
Section 4-6
Lamp ON
PT
The characters are
displayed white on black.
Lamp ON
PT
The memory table display
area of the lit lamp is
overwritten.