X8 Instruction Set Reference Manual
4-4
Programming Instruction Overview
Direct Addressing
When you use direct addressing, you can input a specific data table elements of
inte
r
nal X8 Series PLC (below is an example of N4.1) as shown in the example
below.
Indirect Addressing
Indirect addressing allows components within the address to be used as
pointers to other data locations within the controller.
This functionality can be especially useful for certain types of applications,
recipemanagement, batch processing and many others.
To define which components of an address are to be indirected, a closed
bracket "[ ]" is used.
The above example is the ladder program that adds 1221 to data table value
that is expressed N4.[N4.1] and stores it to N4.2.
If the value of location N4.1 = 10, this instruction copies data value from data
table specified by N4.10 and stores it to location N4.2 after adding 1221 to the
data value.
In this example, the range of N4.1 which is supported by X8 Series PLC is
from 0 to 1534, and total is 1535.
0002
B3.0.0
ADD
EN
ENO
IN 1
N4.1 -
0 <
OUT - N4:2
> 1221
IN 2
1221 -
1221
<
0002
B3.0.0
ADD
EN
ENO
IN 1
N4.[N4.1] -
0 <
OUT - N4:2
> 1221
IN 2
1221 -
1221
<
Содержание X8 Series
Страница 1: ...Catalog Number s X8 M14DDT X8 M16DDR X8 M32DDT X8 Instruction Manual Reference Manual ...
Страница 16: ......
Страница 64: ...X8 Instruction Set Reference Manual 2 12 X8 Series PLC Memory and Data Table ...
Страница 134: ...X8 Instruction Set Reference Manual 5 38 Using the High Speed Counter and Programmable Limit Switch ...
Страница 166: ...X8 Instruction Set Reference Manual 7 8 Relay Type Bit Instructions ...
Страница 180: ...X8 Instruction Set Reference Manual 8 14 Timer and Counter Instructions ...
Страница 205: ...X8 Instruction Set Reference Manual Math Instructions 10 17 ...
Страница 206: ...X8 Instruction Set Reference Manual 10 18 Math Instructions ...
Страница 212: ...X8 Instruction Set Reference Manual 11 6 Converion Instructions ...
Страница 218: ...X8 Instruction Set Reference Manual 12 6 Logical Instructions ...
Страница 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Страница 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Страница 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
Страница 280: ...X8 Instruction Set Reference Manual 20 12 PID Control ...
Страница 296: ...X8 Instruction Set Reference Manual 21 16 ASCII Instructions ...
Страница 308: ...X8 Instruction Set Reference Manual 22 12 Communications Instructions ...
Страница 312: ...Appendix A 4 System Error Code ...
Страница 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Страница 322: ...Appendix B 10 MSG Instruction Error Code ...
Страница 325: ...ASCII Character Set Appendix C 3 ...
Страница 326: ...Publication number X8 RM001A EN September 2012 ...
Страница 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...