trapezoid frequency outputs, 3
troubleshooting
flowcharts, 136
tables, 130–134
U
Underflow (UF) Flag, 75
Unit classification, 10
Unit errors, 38
codes, 72
unit numbers, 10
switches, 22
Unit Setup Area
allocation, 14
and Programming Device connection, 36
and write protection, 15
details, 55–62
overview, 56
settings enabled at startup, 57
settings enabled at startup and start of operation, 58
152
Index
Unit Setup Area Reset Bit, 75
user memory
capacity exceeded, 74
protection, 15, 57
user program, precautions, xv
user-set words in Unit, shared with DM Area in CPU, 3
user-set words in CPU, shared with LR Area words in Unit, 4
W
weight, 12
wiring, 27–35
connectors, 32
methods, 31–36
wire size, 32
Work Area
allocations, 13
function, 64
write protection, 15