3-3SectionScreen Display and Notification
301
Press the touch switch with the screen switching function when the screen is to
be switched.
Reference: When the screen is changed over, the screen switching strobe of the PT status
notify bit changes to 1 (ON), after the new screen number is written to the
screen switching setting area in the PT status control area, so that the event of
screen switching is notified to the host. After that the screen switching strobe
returns to 0 (OFF) automatically. (Refer to page 304.)
When NT20S or NT30/620 compatible mode is being used, the current screen
number occupies the first word of the PT status notify area and the word con-
taining the PT status notify bits is shifted down one word. (Refer to page 451.)
Example of Use
Screens Other Than No. 9999
Screen number 5 is set for touch switch 1
To next screen
When touch switch 1 is pressed
Screen number 5
Screen No. 9999
Screen number
9999 is set for
touch switch 1
Menu Screen
Operation 1
Operation 2
Screen switching
Instruction from host
Screen switchover key
Touch switch 1 pressed
Previous screen
Switching the Screen by Using the Switch Screen Function of the Bit Memory Table
If this method is used, it is possible to switch the screen by bit operation at the
host.
PC
← 1 (ON)
PT
↑
1
0
Display
Screen No. 3
Bit table entry 1
Screen No. 3
To be set by the
Support Tool
Allocated bit (bit table entry 1)
After confirming that the screen
has been switched by the data
at the screen switch setting area
in the PT status control area
Allocated bit (bit table entry 1)
← 0 (OFF)
(On the PT, the screen number
remains at 3.)
When creating a screen with the Support Tool, set the Switch Screen function in
the bit memory table entry and specify the screen number of the screen to be
displayed. Allocate a bit for the bit memory table entry in the host.
Operation
Setting
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