6-4
Section
Allocating PT Data to PT Memory
81
If remote I/O communications are operating properly, we recommend read-
ing the network configuration with the Configurator and saving that configu-
ration as a file for future reference.
6-4
Allocating PT Data to PT Memory
The following data can be allocated in PT memory.
•
PT status control area (5 words, fixed)
•
PT status notify area (3 words, fixed)
•
Window control area (9 words, fixed)
•
Numeral memory table (1 or 2 words)
•
Character string memory table (1 to 20 words)
•
Bit memory table (1 bit)
•
Lamp (1 bit)
•
Touch switch (1 bit, and another bit for the host notification function)
Reference 1. The DeviceNet Interface Unit can be mounted to an NT31, NT31C, NT631,
or NT631C PT. A PT with the DeviceNet Interface Unit’s system program
installed can use only the -V1 version functions of the PT.
2. Refer to the NT31/NT631 Programmable Terminal Reference Manual
(V064) for details on PT screen elements and functions.
Use the NT-series Support Tool for Windows (version 3.2 or higher) for opera-
tions such as creating screens displayed on the PT, registering screen elements,
and allocating PT memory.
The procedures for creating screens are the same as they are when using the
regular Memory Link method. Words and bits are allocated to PM0000 to
PM9999 of PT memory based on the type of data being allocated. PT memory
can be allocated as words and bits just like I/O area words and bits.
ABCDEFG
70%
3 5 0 0
A B C D E F G
PT
PT memory
Numeral memory table
Character string memory table
Bit memory table
PT status
control area
PT status
notify area
Window
control area
PM0000
PM9999
6-4-1 Precautions when Allocating Data to PT Memory
Observe the following precautions when allocating data in the PT memory of a
PT with a DeviceNet Interface Unit installed.
•
Allocate the PT status control area to the DeviceNet Interface Unit’s output a-
rea if at all possible. It won’t be possible to control the PT if the PT status control
area is allocated to the Unit’s input area. Also, exchanging data by message
communications takes some time, so it may not be possible to control the PT
as expected if message communications are used.
