Rockwell Automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controllers User Manual - Manual (Page 58)

1785-UM022C-EN-P - February 2008
2-20 Planning to Use Your ControlNet PLC-5 Processor
1771 Modules
ControlNet 1771 discrete I/O data-transfer mapping requires one
map-table entry per node. ControlNet 1771 non-discrete I/O
data-transfer mapping requires one map-table entry per module.
The ControlNet scheduled I/O data-transfer mechanism makes it
possible to eliminate block-transfer programming to communicate
with the 1771 modules. For a complete list of these modules, refer to
RSNetWorx for ControlNet documentation.
The types of modules that may be accommodated by the processor’s
scheduled non-discrete I/O data-transfer mechanism are typically
those modules that require a one-time configuration and then
continuously read or write.
To communicate with 1771 modules, you can also include explicit
CIO instructions in your ladder-logic program. See Chapter 4 and
Appendix C for more information.
The 1771 discrete rack must be owned by a processor before any
non-discrete connections (scheduled or unscheduled) can be
established with the 1771 adapter. The non-discrete connections can
be established by the owner processor and/or non-owner processors.
1747 Modules
ControlNet 1747 discrete I/O data-transfer mapping requires one
map-table entry per node. ControlNet 1747 non-discrete I/O
data-transfer mapping requires one map-table entry per module.
The ControlNet scheduled I/O data-transfer mechanism makes it
possible to map 1747 modules. For a complete list of these modules,
refer to RSNetWorx for ControlNet documentation.
1794 Modules
ControlNet 1794 FLEX discrete I/O data-transfer mapping requires
one map-table entry per node. ControlNet 1794 non-discrete I/O
data-transfer mapping requires one map-table entry per module.
The ControlNet scheduled I/O data-transfer mechanism makes it
possible to map 1794 modules. For a complete list of these modules,
refer to RSNetWorx for ControlNet documentation.
The Run/Program mode for all modules in a 1771
chassis is controlled by the owning discrete rack
connection. You must consider this when configuring
non-discrete connections from other processors.
ATTENTION
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