X8 Instruction Set Reference Manual
2-4
X8 Series PLC Memory and Data Table
Memory consumption is allocated as follows:
INTEGER (N)= 1 Word
LONG INTEGER (L)= 2 Words
TIMER (TM)= 3 Words
For example, memory consumption in Ladder Program is allocated as
follows:
–
NOCC instruction which has 1 operand, consumes 1 word
–
EQU instruction which has 2 operands, consumes 2 words
–
ADD instruction which has 3 operands, consumes 3 words
SFR (Special Function Register) does not comsume user memory.
X8 Series PLC User Memory
The
X8 Series PLC
supports64KW of memory for data and programs. And
X8 Series PLC suuports seperate 4GB SD memory for data logging, recipe,
ladder backup.
Viewing X8 Series PLC Memory Usage
1.
Select Controller Properties and double click.
TIP
Each input and output memory consumes 3 words due to the overhead
associated with I/O forcing.
TIP
Although the PLC allows up to 256 elements in the Data Table, it may
not actually be possible to create data table (0~1535) with 256
elements due to 64KW limited user memory size in the PLC.
Summary of Contents for X8 Series
Page 1: ...Catalog Number s X8 M14DDT X8 M16DDR X8 M32DDT X8 Instruction Manual Reference Manual ...
Page 16: ......
Page 64: ...X8 Instruction Set Reference Manual 2 12 X8 Series PLC Memory and Data Table ...
Page 166: ...X8 Instruction Set Reference Manual 7 8 Relay Type Bit Instructions ...
Page 180: ...X8 Instruction Set Reference Manual 8 14 Timer and Counter Instructions ...
Page 205: ...X8 Instruction Set Reference Manual Math Instructions 10 17 ...
Page 206: ...X8 Instruction Set Reference Manual 10 18 Math Instructions ...
Page 212: ...X8 Instruction Set Reference Manual 11 6 Converion Instructions ...
Page 218: ...X8 Instruction Set Reference Manual 12 6 Logical Instructions ...
Page 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Page 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Page 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
Page 280: ...X8 Instruction Set Reference Manual 20 12 PID Control ...
Page 296: ...X8 Instruction Set Reference Manual 21 16 ASCII Instructions ...
Page 308: ...X8 Instruction Set Reference Manual 22 12 Communications Instructions ...
Page 312: ...Appendix A 4 System Error Code ...
Page 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Page 322: ...Appendix B 10 MSG Instruction Error Code ...
Page 325: ...ASCII Character Set Appendix C 3 ...
Page 326: ...Publication number X8 RM001A EN September 2012 ...
Page 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...