User manual

Index
I–5
powerup routine
as a programming feature, 71
when to use, 71
processor
front panel, PLC5/10, 5/12, 5/15, 5/25,
52
raceway layout, 34
scan time, 106
scanning, 91
processor status, file addresses, 610
processorresident local I/O
defined, 11
rack fault, 711
recovering from rack fault, 712
processorresident local I/O chassis,
defined, 11
program execution, 72
program scan
executing rungs selectively, 93
false versus true logic, 92
introduction to, 91
programming software
define your programming application,
61
features, 71
preparing application programs
creating the program, 64, 65
packaging example, 63
programming terminal
cables, 216
direct connection, 510
remote connection, 510, 511
serial connection, 510, 512
R
ready, program state, 72
remote I/O, scan time, 102
block transfers, 103
calculating, 104
communication rate, 102
number of rack entries in scan list, 103
optimizing, 104
remote I/O adapter mode
defined, 19
transferring data, 81
remote I/O chassis, defined, 11
remote I/O link
cables, 215
defined, 11
devices on link other than adapter
module, 25
planning cabling, 35
rack fault, 712
recovering from rack fault, 712
remote I/O scanner mode, defined, 18
routing guidelines, 35
S
scan time, calculating, 106
scanner mode
blocktransfer sequence
PLC5/10, 5/12, 5/15, 5/25
processors, 819
with status bits, 820
transferring data
block transfer, 817
queued requests, 817
to local I/O, 817
to remote I/O, 818
discrete data, 816
using processor as a remote I/O scanner,
18
scanning
discretetransfer data
to processorresident I/O, 94
to remote I/O, 94
introduction to, 91
sequential function charts. See SFCs
SFCs
application example, 63
as a processor feature, 16
control tasks, 61
defined, 61
programming considerations, 63
sample chart, 62
transitions, 61
when to use, 62
site preparation
conductor categories, 35
raceway layout, 34
routing conductors, 35
status file, processor, 69
STI
program flow, 71
when to use, 71
subprogram calls, as a processor feature.
See SFCs
switch settings
adapter module
1771ASB with complementary I/O,
A6
1771ASB without complementary I/O,
A4