265
Areas for Control/Notification
Section 7-2
7-2
Areas for Control/Notification
The following areas are provided for the control and exchanging information of PT
(such as changes in status) between the NT31/NT31C and the host.
- PT status control area
This area is used to designate the screen to be displayed at the NT31/NT31C,
to copy data contents between memory tables in the NT31/NT31C, 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 NT31/NT31C, and to
notify information 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
- 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.
- The PT status control area, PT status notify area and window control area must
be set so that they do not overlap.
- When multiple PTs are connected to one PLC, 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.
- 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.
7-2-1
PT Status Control Area (Host
↔
NT31/NT31C)
When data is written to this area from the host, the NT31/NT31C reads the data
and operates accordingly. However, note that the number of the currently dis-
played screen is written to the “screen switch setting” word from the NT31/NT31C
too.
The PT status control area is configured as five consecutive words as shown be-
low. 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
Summary of Contents for NT31 Series
Page 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Page 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Page 41: ...30 Before Operating Section 1 5...
Page 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Page 160: ...149...
Page 174: ...163...
Page 193: ...182...
Page 211: ...200...
Page 235: ...224 c Return to the screen on which screens are specified...
Page 262: ...251...
Page 360: ...349 It is not possible to control a gloval window by touch switch operation...
Page 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Page 476: ...465 Special Functions Section 7 16...
Page 495: ...484 OFF...
Page 610: ...599 Commands Responses Section 9 3...
Page 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...