Omron NT20, Руководство пользователя

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186
Memory Tables and Bar Graphs Section 5-2
Numeral memory table entry number 51: DM 0000 (number of regis-
tered words: 1)
Character string memory table entry number 100: “NT610G” (6 digits)
Character string memory table entry number 101: “NT610C” (6 digits)
Character string memory table entry number 102: “NT20 ” (6 digits)
Character string memory table entry number 103: “NT600S” (6 digits)
Data registered for the screen: numeral memory table entry number 51.
• PLC Program
Create the PLC ladder program as follows:
• Program Operation
1,2,3... 1. Each time bit 00100 comes ON, the display on the NT20 screen changes
according to one of the steps in the following sequence: “NT610G”
→
“NT610C”
→
“NT20”
→
“NT600S”.
2. Each time bit 00101 comes ON, the display on the NT20 screen makes
changes according to one of the steps in the following sequence:
“NT600S”
→
“NT20”
→
“NT610C”
→
“NT610G”.
In this example, the contents of numeral memory table entry number 51 refer-
enced in indirect specification are not checked. Make sure that the contents of
numeral memory table entry number 51 stay within the range of 0100 to 0103
when the program is actually used.
5-2-4 Copying Memory Table Entries
The following describes the procedure to change displayed numerals or char-
acter strings by copying the contents of a memory table entry.
Numerals and character strings can be changed also by changing the con-
tents of the allocated words. Refer to
5-2-2 Changing Displayed Numerals or
Character Strings (Changing the Contents of Allocated Words ... Direct Spec-
ification)
on page 182 explained before.
To change the numerals or character strings displayed on the NT20, copy the
data between the numeral or character-string memory table entries by using
the “copy memory table setting” of the PT status control area.
Line 1
NT20
Numeral memory table number 51 specified in indirect specification of character string display
Product
@INC(38)
DM0000
00100
(1)
Numeral memory table number used in indirect specification
@DEC(39)
DM0000
(2)
Numeral memory table number used in indirect specification
00101