Access Time; Slc 5/02 Processor Example - Allen-Bradley 1747-SN User Manual

Processor
SLC 5/02 Series B All types
SLC 5/02 Series C All types
XIC or XIO
OTU, OTE, or OTL
COP to M file
SLC 5/03 (All COP from M file
S i ) Series)
FLL
MVM to M file
any source or Destination M file
address
XIC or XIO
OTU, OTE, or OTL
COP to M file
COP from M file
SLC 5/04 OS400 SLC 5/04 OS400
FLL
MVM to M file
any source or Destination M file
address

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.
Instruction Type
Instruction or Word of Data
Except the OSR instruction and the instruction parameters noted on page B-2.

SLC 5/02 Processor Example

M0:2.1
] [
M0–M1 Files and G Files
Access Time per Bit
1580 µs plus 670 µs per
1930 µs
word
1160 µs 950 µs plus 400 µs per word
782 µs
--
925 µs
--
772 µs plus 23 µs per word
--
760 µs plus 22 µs per word
--
753 µs plus 30 µs per word
--
894 µs
--
730 µs
--
743 µs
--
879 µs
--
735 µs plus 23 µs per word
--
722 µs plus 22 µs per word
--
716 µs plus 30 µs per word
--
850 µs
--
694 µs
--
M0:2.1
M1:3.1
( )
]/[
1 1 10
Publication 1747 6.6 - July 1996
B–5
Access Time per
Multi Word Instruction