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Index
450
See also Units
definition, 38
disabling service, 48, 420
Duplication Error Flags, 53
Error Flags, 53, 55
I/O allocation, 38
Initializing Flags, 50
Initializing Wait Flag, 50
service interval, 51
servicing, 419
Setting Error Flag, 54
Unit Number Setting Error Flag, 56
CPU Unit
memory, 21
operation, during power interruption, 417
operational flow, 414
processing after power interruptions, 416
switches, 12
synchronous operation, 415, 419
CY. See flags, CY
cycle, First Cycle Flag, 58
cycle times, 418
calculating, 418
examples, 423–424
Cycle Time Too Long Flag, 53
instruction execution times, 425
maximum since start-up, 57
operations significantly increasing, 422
present, 57
Programming Device servicing, 51
D
data
comparison instructions, 193–206
converting, 29, 207–237
floating-point data, 280
radians and degrees, 290, 291
decrementing, 301–305
formats, 90
incrementing, 301–305
moving, 175–193
retention
in DM Area, 60
in EM Area, 60
searching, 353
shifting, 147–174
tracing. See tracing
transfers, 21
data areas
definition, 27
structure, 27
Data Link Area, 40
Data Registers, 62
copying current contents, 356
loading data, 355
data tracing. See tracing
dead-band control, 327
dead-zone control, 328
DEBUG mode, description, 6
decimal points, 29
decrementing, 301–305
definers, definition, 100
differentiated instructions, 103
function codes, 100
digit numbers, 28
DIP switch, 13
display, I/O Control and I/O Interface Units, 22
outputting characters, 350
DM Area, 60–61
DR. See Data Registers
duplex, initialization, 420
Duplex Startup Error Flags, 50
Duplex System
Duplex Alternate CPU Waiting At Startup Flag, 50
Duplex Bus Error At Startup Flag, 50
Duplex Bus Error Flag, 54
Duplex CPU Error Flag, 51
Duplex CPU Memory Error Flag, 51
Duplex CPU Replacement Enabled Flag, 51
Duplex Power Supply Error Flag, 56
Duplex Verification Error At Startup Flag, 50
Duplex Verification Error Flag, 51
EM Size Mismatch Flag, 51
PC Setup Mismatch Flag, 51
PC Setup Transfer Error Flag, 51
Program Mismatch Flag, 52
Duplex Unit, switches, 14
E
EC Directives, xv
EM Area, 60–61
EM Unit, 17
current bank number, 59
main components, 17
selecting bank number, 352
EQ. See flags, EQ
ER. See flags, Instruction Execution Error
Error Log, clearing, 9
Error Log Area, 48
errors
codes, 53
Error Log Area, 48
programming, 342
failure point detection, 344
Instruction Execution Error Flag, 57
messages, programming, 386
programming messages, 386
event processing, potential problems, 423
execution condition, definition, 68
execution time, instructions, 425–436
Expansion Data Memory Unit. See EM Unit
Summary of Contents for CVM1D
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