Areas For Control/Notification; Pt Status Control Area (Host ↔ Nt31/Nt31C) - Omron NT31 Operation Manuals

Areas for Control/Notification

7-2

Areas for Control/Notification

Reference
PT Status Control Area (Host ↔ NT31/NT31C)
7-2-1
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.
- 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.
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
Word
n Screen No. (4-digit BCD or hexadecimal)
n + 1
Copy destination memory table No.
n + 2
n + 3
n + 4
8 7 6 5
Copy source memory table No.
(4-digit BCD or hexadecimal)
(4-digit BCD or hexadecimal)
PT status control bits
Reserved for system use
Section 7-2
4 3 2 1 0 Bit
Screen switch setting
Copy memory table
setting
PT status control
265