Data Table
Chapter 3
39
Each bit in the input image table may have a corresponding real hardware
terminal on the I/O rack associated with it, although this may not always
be the case, since a corresponding input module may not actually be placed
in an I/O rack slot. If it does, the terminal address is the same as the bit
address. The correspondence between the two is illustrated in Figure 3.4.
CAUTION: Bit and/or word storage is not possible in the
input image table. Input bits which do not have an actual input
module in the I/O rack corresponding to address are cleared to
zero during each I/O scan.
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