Installation manual

1 Publication 1747-RM001G-EN-P - November 2008
Appendix C
Memory Usage
This appendix provides:
• instruction words for the Fixed, SLC 5/01, SLC 5/02, SLC 5/03, SLC
5/04, and SLC 5/05 processor.
• examples on how to estimate the total memory usage of your system.
Memory Usage Overview
SLC 500 controllers have the following user memory capacities.
The following definitions apply when figuring your memory usage.
• fixed, SLC 5/01, and SLC 5/02: 1 instruction word = 4 data words = 8
bytes
• SLC 5/03, SLC 5/04, and SLC 5/05: 1 instruction word = 1 data word
If you want to use a See page
Fixed or SLC 5/01 processor C-2
SLC 5/02 processor C-7
SLC 5/03 processor C-13
SLC 5/04 or SLC 5/05 processor C-13
Table C.1 Processor Memory Capacity
Type of Processor User Memory Capacity
Fixed and SLC 5/01 1,024 instruction words
SLC 5/02 4,096 instruction words
SLC 5/03 8k 4,096 words
SLC 5/03, SLC 5/04,
SLC 5/05 16k
12,288 words
(1)
(1)
When your ladder program is larger than 12k words, you must split
your program into two files. A main (file 2) and at least one subroutine
for(3 to 255) is required.
SLC 5/04, SLC 5/05 32k
SLC 5/04, SLC 5/05 64k
28,672 words
(1)
61,440 words
(1)