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Section 5-2
Example of Changing a Character-String in Indirect Specification
An example in which the character-strings being displayed arechanged by adding
the contents of the word allocated to the numeral memory table which is used in
indirect specification is given below.
Setting by the support tool
Perform the following setting with the support tool.
Numeral memory table number 51: DM0000 (registration word: 1 word)
Contents to be registered
for the screen: Numeral memory table number used for
indirect specification ..... 51
Initial value of numeral memory table
number 51 ..... 100
Line 1
NT600S
Display of character-string (specification of numeral memory
table number 51 in indirect specification)
Character-string memory table settings
# Contents
Number of
Character Digits
100 NT20S 6 digits
101 NT600S 6 digits
102 NT610G 6 digits
103 NT610C 6 digits
(no word allocation)
PC program
Create the following PC ladder program.
Make sure that the contents of the numeral table used for indirect specification
will not be outside the range of table numbers used for display.
@INC(38)
DM0000
00100
(1)
Numeral memory table number used for
indirect specification
@DEC(39)
DM0000
00101
(2)
Numeral memory table number used for
indirect specification