Rockwell Automation 1757-SWKIT3200 ProcessLogix R320.0 Installation and Upgrade Guide - Manual (Page 256)

Publication 1757-IN032B-EN-P - April 2001
7-16 Performance and Capacity Specifications
I/O Network Configuration Rules
Table 7.T I/O ControlNet Addressing
I/O ControlNet Addressing
MACID Rules and Descriptions
1
(ControlNet
Keeper) 1) Must be configured on every physical I/O ControlNet segment.
2) Must be assigned to the Downlink 1756-CNB in the Controller chassis or to
both Primary and Secondary Downlink CNBs in a Redundant Chassis Pair (RCP)
for each physically separate I/O ControlNet segment.
2 1) Must not be assigned to any Node when using Redundant Controller.
2) Should be reserved when using non-redundant Controller for future
Redundant upgrade.
3 1) Must not be assigned to a Downlink 1756-CNB in a Controller chassis or
Redundant Chassis Pair.
2) Must be assigned to a Remote 1757/1756 I/O chassis 1756-CNB or Remote
1794/1797-ACNR15 or CN2FF, in conjunction with each MACID #1
assignment.
4 Should be used by or reserved for additional Remote 1757/1756 I/O chassis
1756-CNB or 1794/1797-ACNR15 or CN2FF.
5 and up Should be used consecutively from low to high values with the following
guidelines:
•
Odd addresses should be used for additional Downlink CNBs in Controller
chassis or RCP (with next even address not used), when additional
Downlink CNBs are connected to a common physical I/O ControlNet
segment (not allowed with CN2FFs connected).
•
After Downlink CNBs are assigned, remaining addresses may be used for
additional Remote 1757/1756 I/O chassis CNBs or 1794/1797-ACNR15s
or CN2FFs.
Additional I/O ControlNet Rules
1. Multiple I/O ControlNet Downlink CNBs may be connected to a common physical I/O
ControlNet segment and must adhere to the rules above. Exception for this rule when
using CN2FFs, which must use separate physical segments.
2. PLCs or other ControlNet Devices may not reside on any I/O ControlNet segment
connected to a BETA-PLX52 or 1757-PLX52 Controller.
3. The ControlNet Keeper is the lowest configured MAC ID per physical ControlNet segment.
This table assumes that MAC ID #1 exists per ControlNet segment.
4. When the CN2FF is being used, the ControlNet Parameters for that segment must be
configured for NUT = 6.25 ms. and SMAX = to the Highest MACID used (but < = UMAX),
using Network Tools.