1785-UM022B-EN-P - February 2002
Planning to Use Your ControlNet PLC-5 Processor 2-17
Remote I/O
The following table shows the default number of input and output
words reserved by the programming software for the different sizes
and addressing modes of non-ControlNet Remote I/O if you first
configure non-ControlNet Remote I/O on your processor:
The programming software reserves non-ControlNet Remote-I/O
output- and input-image space according to these guidelines:
• It does not overlap processor-resident local I/O reserved image
space
• It addresses input- and output-image space offset in octal from
– 00-37—for the PLC-5/20C15 processor
– 00-177—for the PLC-5/40C15 processor
– 00-177—for the PLC-5/46C15 processor
– 00-277—for the PLC-5/80C15 processor
• The output-image offset value in the I/O map corresponds to the
first slot of the referenced chassis—i.e., in a 4-slot chassis set for
1-slot addressing, the corresponding output-image offset of O:10
would map the words O:10, O:11, O:12, and O:13 to slots 0, 1, 2,
and 3 respectively
• The input-image offset corresponds to the first slot in the
referenced rack, and the offset location of the input modules in
that rack corresponds to the same offset in the image table—i.e.,
if a chassis set for 1-slot addressing has an input-image offset of
I:10 and an input module in slot 3, the word that corresponds to
that input module would be I:10 + 3, or I:13
Addressing
Mode
Number of Words Reserved
4 Slots 8 Slots 12 Slots 16 Slots
2 Slot 2468
1 Slot 481216
1/2 Slot 8 16 24 32
AB Drives
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