2-2
Section
Areas for Control/Notification
46
2-2
Areas for Control/Notification
The following areas are provided for PT control and PT status notification be-
tween the PT and the host.
•
PT status control area
This area is used to designate the screen to be displayed at the PT, to copy
data contents between memory tables in the PT, and to control the status of the
backlight and other statuses.
•
PT status notify area
This area is used to notify the memory table number to the host when there is a
change in the data contents of a memory table in the PT, and to notify informa-
tion such as changes in the PT status.
•
Window control area
This area is used to designate the window screen number or display position
from the host, and to notify these information from PT.
Reference:
S
The PT status control area and PT status notify area must be allocated to the
host. Screen data cannot be downloaded from the Support Tool unless they
have been allocated.
S
The PT status control area, PT status notify area and window control area must
be set so that they do not overlap.
S
When multiple PTs are connected to one PC, the PT status control area, PT
status notify area and window control area of each PT must be set so that they
do not overlap, or the movement of PT will be unstable.
S
Allocate window control area to the host only when the window is used and
when the window is controlled from the host. Even if the window control area is
not allocated to the host, a window can be controlled by touch switch operation
etc.
2-2-1 PT Status Control Area (Host
↔
PT)
When data is written to this area from the host, the PT reads the data and oper-
ates accordingly. However, note that the number of the currently displayed
screen is written to the screen switch setting word from the PT too.
The PT status control area is configured as five consecutive words as shown
below. The first word (word n) is set in the Control/Notify Area settings in the PT
configuration settings made with the Support Tool.
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Word
Bit
n
Screen No. (4-digit BCD or hexadecimal)
Screen switch setting
n + 1
Copy source memory table No.
(4-digit BCD or hexadecimal)
n + 2
Copy destination memory table
No. (4-digit BCD or hexadecimal)
Copy memory table
setting
n + 3
PT status control bits
PT status control
n + 4
Reserved for system use
Reference:
The configuration and functions of the PT status control area are different when
the PT is set to NT30/620 compatible mode. Refer to
Appendix C for details on
the NT30/620 compatible mode.
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Summary of Contents for NT21 Series
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