Omron NT11 - 01-2004, User Manual

Page: 24 / 186

11
Direct Connection Function
Section 1-5
• Character-string memory table
Allocation destination: Word
Allocate character-string memory table entries to arbitrary words in the PLC. If
word contents change when corresponding character-string memory table
entry is displayed on the screen, the value on the screen will also change.
Messages can be displayed easily.
Reading and writing are executed so that the contents of allocated words are
always the same as those of the character-string memory table entries.
Functions of the PT Status Control Area (PLC to NT11)
The “PT status control area” is used to control the NT11 status. When data is
written to this area in the PLC, the NT11 reads the contents and operates
according to the contents.
[Example of the PT status control area application]
When data is written to the PT status control area, the NT11 will operate as
given below.
Functions of the PT Status Notify Area (NT11 to PLC)
The “PT status notify area” is used to notify the changes of the NT11 status.
When a change is made in the NT11 status, the change is written to this area
in the PLC. By reading the data from the area, the NT11 status can be
checked.
Character-string memory table entry 1
Number of allocated words: 3
First word: DM0100
NT11 PLC
("a", "b")
("c", "d")
("e", "f")
Screen 3
display
Copy
Numeral memory table entry 50
Numeral memory table entry 7
PT status control area
Screen switch setting
Memory table entry
Copy setting
PT status control bits
8010
1007
0050
0003
NT11 PLC
Printing of daily reports or display histories