13
Displaying Screens Section 2-2
Switching Screens Using
the Ladder Program
Create a ladder program that writes the screen number to the first word of the
PLC system memory to switch the screen.
Communications between the PT and the PLC
Example: Changing from Screen 1 to Screen 2
Switching Screens after a
Specified Time (Auto-
Paging)
The automatic paging function can be used to automatically switch to a speci-
fied screen after a specified period of time has passed. Settings are made in
the NV Configuration of the PT.
Application Example:
1. Screen 1 is displayed for 10 seconds and then screen 2 is displayed.
2. Screen 2 is displayed for 5 seconds and then screen 3 is displayed.
Precaution for Correct Operation
Screen numbers are displayed in decimal on the NV-Designer but they must be
in hexadecimal when writing the screen number to the PLC internal system
memory.
Continuous communications
NV
PLC
Basic Communications Area: Word Addresses
First word
2nd word
3rd word
Screen number specified from PLC.
Do not use.
Current Screen Number
PLC internal memory
Write
Read
Ladder program
MOV
Screen 2
Screen 1
Specification to
change to screen 2.
Basic Communications Area: Word Addresses
Example: D100
D101
D102
Example: D100
D101
D102
2
Do not use.
1
2
Do not use.
2
PLC internal memory
PLC internal memory
Write
Ladder program
MOV
&2
D100
Basic Communications Area: Word Addresses
Changed to
screen 2.
The number of the screen to
display (2) is stored in D102.
Refer to 6-2-6 Auto-Paging Tab Page for details.
Screen 1
After 10 s
NV
Screen 2
After 5 s
Screen 3
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