This section describes the components of the Serial Communications Boards and the Serial Communications Units, the
settings required for operation, and the memory allocated in the I/O memory of the CPU Unit for controlling and
monitoring communications.
2-1
2-1-1
2-1-2
2-1-3
2-2
2-2-1
2-2-2
2-3
2-3-1
DM Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-2
CIO Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-3
Initial Settings and I/O Memory Allocations
SECTION 2
62
62
66
69
72
72
73
74
74
79
85
61