1-8 PACSystems* RX3i PROFINET Controller Manual – December 2011 GFK-2571A
System Limits
4 PROFINET Controller modules per RX3i CPU, connected to the same network or to
separate networks.
128 IO-Devices on the PROFINET network.
8 IO-Controllers per network
64 IO-Devices per PROFINET Controller
128 IO-Devices per network, spread across a maximum of 8 IO-Controllers
63/64/130 total devices per PROFINET network, depending on the topology:
o For a network using ring topology, the maximum number of devices is 64 – consisting of
the PROFINET Controller plus up to 63 IO-Devices. If the ring uses Media Redundancy
Protocol, this means one Media Redundancy Manager and up to 63 clients.
o For a network using star topology, the maximum number of devices is 65 – consisting of
the PROFINET Controller plus up to 64 IO-Devices.
o For a network using line topology with two PROFINET Controllers, the maximum number
of devices is 130 (2 PROFINET Controllers plus 2 x 64 devices).
4 PROFINET Controllers per RX3i CPU node
128 IO-Devices per RX3i CPU Node, spread across up to 4 PROFINET Controllers
128 Kbytes of combined input and output memory per PROFINET Controller
Machine Edition Project Maximum Limits
With the above limits, the maximum number of PROFINET IO-Controllers and IO-Devices in a single
Proficy Machine Edition project is:
16 PROFINET IO Networks in a Proficy Machine Edition project
32 Proficy Machine Edition targets per Proficy Machine Edition project
128 IO-Controllers (32 RX3i CPU targets × 4 IO-Controllers per RX3i CPU Node)
2048 IO-Devices (16 PROFINET IO networks × 128 IO-Devices per network)
Total: 2176 Devices (not including backplanes, power supplies, IO modules, etc).
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