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560
R
Racks, types, 15
Remote I/O Master Units, PC cycle time, 365
Remote I/O Systems, error bits and flags, 39
response time calculations, C500 PCs, 380
response times, I/O, 376–387
rightmost, definition, 26
RS-232C
communications
one-to-one link, 430
procedures, 426
receiving, 428
transmitting, 427
connecting Units, 430
RS-232C port, wiring example, 420
S
self-maintaining bits, using KEEP(11), 154
set value. See SV
settings
communications, host link, 422
Communications Board, 65
PC Setup, 60
Special I/O Unit Area, 67
seven-segment displays, converting data, 215
shift registers, 171–179
controlling individual bits, 172
signed binary arithmetic flags, 523
signed binary data, 28
Special I/O Unit, programming examples, 126
Special I/O Unit Area, settings, 67
Special I/O Unit Default Area, 57
Special I/O Units. See Units
SR area, 33–48
SSS. See peripheral devices
stack operation
COLL(81), 185
DIST(80), 183
status indicators. See CPU Unit indicators
step execution, Step flag, 44
step instructions, 291–300
subroutine number, 284
subroutines, 279–290
SV
accessing via TC area, 69
changing, 406
CNTR(12), 170
timers and counters, 159
switches, DIP. See DIP switch
SYSMAC LINK, loop status and completion codes, 38
SYSMAC LINK System
Active Node Flags, 52
instructions, 318
service time, 53
Using Peripheral Devices, 54
SYSMAC NET, loop status and completion codes, 38
SYSMAC NET Link System
Data Link Table transferring, 102
instructions, 318
service time, 53
SYSMAC Support Software. See peripheral devices
T
TC area, 68–69
TC numbers, 68, 159
TERMINAL mode, 88
Key Bits, 54
time, reading and setting the clock, 411
timers
bits in TC area, 68
changing SV, 406
conditions when reset, 160, 164
TTIM(120), 165
example using CMP(20), 194
extended timers, 161
flicker bits, 163
inputting SV, 106
ON/OFF delays, 161
one-shot bits, 162
TR area, 71
TR bits, use in branching, 115
tracing
See also See data tracing and address tracing.
flags and control bits, 55
U-W
UM Area, allocation to expansion DM, 410
UM area, 70
Units
definition, 4
High-density I/O Units, definition, 4
I/O Units, definition, 4
Link Units, definition, 4
Special I/O Units, definition, 4
unsigned binary data, 27
watchdog timer, 364
extending, 306
word bit, definition, 24
work word, definition, 24