Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 184)

Publication 1747-UM010B-EN-P - September 2003
B-4 M0-M1 Files and G Files
The COP instruction below copies data from an M1 data file to an
integer file. This technique is used to monitor the contents of an M0
or M1 data file indirectly, in a processor data file.
Access Time
During the program scan, the processor must access the specialty I/O
card to read/write M0 or M1 data. This access time must be added to
the execution time of each instruction referencing M0 or M1 data. For
the SLC 5/03 and SLC 5/04 processors, the instruction types vary in
their execution times.
The following table shows approximate access times per instruction or
word of data for the SLC 5/02, SLC 5/03, and SLC 5/04 processors.
COP
Copy File
Source
#M1:4.3
Dest #N10:0
Length 6
COP
Processor Instruction
Type Access Time
per Bit
Instruction or
Word of Data Access Time per
Multi-Word Instruction
SLC 5/02 Series B
All types
(1) 1930 µs 1580 µs plus 670 µs per word
SLC 5/02 Series C
All types
(1) 1160 µs 950 µs plus 400 µs per word
SLC 5/03 (All
Series) XIC or XIO 782 µs —
OTU, OTE, or
OTL 925 µs —
COP to M file — 772 µs plus 23 µs per word
COP from M file — 760 µs plus 22 µs per word
FLL — 753 µs plus 30 µs per word
MVM to M file 894 µs —
any source or
Destination M
file address 730 µs —