1747-6.22, Backup Scanner User Manual

Access Time
M0-M1 Files and G Files B-201
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.
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 --
SLC 5/04 OS400 XIC or XIO 743 µs --
OTU, OTE, or OTL 879 µs --
COP to M file -- 735 µs plus 23 µs per word
COP from M file -- 722 µs plus 22 µs per word
FLL -- 716 µs plus 30 µs per word
MVM to M file 850 µs -any
source or Destination M
file address
694 µs --
1. Except the OSR instruction and the instruction parameters noted on page C-2.
SLC 5/02 Processor Example
M0:2.1
] [
1
M1:3.1
]/[
1
( )
M0:2.1
10
If you are using a SLC 5/02 Series B processor, add 1930 µs to the
program scan time for each bit instruction addressed to an M0 or M1
data file. If you are using a SLC 5/03 Series C processor, add 1160
µs.
Publication 1747-6.22