Publication 1785-UM012D-EN-P - July 2005
Addressing I/O and Controller Memory 4-13
Addressing File Types
The following two tables show the available file types and the amount of
memory used by each.
Data Table File Types and Memory Usage for PLC-5 Controllers Series E/Revision D
and Later
File Type File-Type
Identifier
File
Number
Maximum Size of File
16-bit Words and Structures
Memory Used in
Overhead for Each
File
(in 16-bit Words)
Memory Used
(in 16-bit Words)
per Word,
Character, or
Structure
PLC-5/11,
-5/20,
-5/20E
PLC-5/30 PLC-5/40,
-5/40E,
-5/40L
PLC-5/60,
-5/60L,
-5/80, -5/80E
Output image O 0 32 64 128 192 6 1/word
Input image I 1 32 64 128 192 6 1/word
Status S 2 128 128 128 128 6 1/word
Bit (binary) B
3
1
2000 words 6 1/word
Timer T
4
1
6000 words/2000 structures 6 3/structure
Counter C
5
1
6000 words/2000 structures 6 3/structure
Control R
6
1
6000 words/2000 structures 6 3/structure
Integer N
7
1
2000 words 6 1/word
Floating-point F
8
1
4000 words/2000 structures 6 2/structure
ASCII A 3-999 2000 words 6 1/2 per character
BCD D 3-999 2000words 6 1/word
Block-transfer BT 3-999 12000 words/2000 structures 6 6/structure
Message MG 3-999
32760 words/585 structures
2
6 56/structure
PID PD 3-999
32718 words/399 structures
2
6 82/structure
SFC status SC 3-999 6000 words/2000 structures 6 3/structure
ASCII string ST 3-999
32760 words/780 structures
2
6 42/structure
Unused -- 9-999 6 6 0
1
This is the default file number and type. For this file type, you can assign any file number from 3 through 999.
2
The maximum size of a data table file is 32K words. The maximum size of the entire data table is 64K words
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