Chapter 3. Configuration
50
PACSystems* RX3i & RSTi-EP PROFINET IO-Controller User Manual
GFK-2571N
3.1
Configuration Overview
The
Proficy Machine Edition PLC Logic Developer
programmer is used to create and download the configuration
for an RX3i PROFINET network and its devices.
3.1.1
System Planning
3.1.1.1
Device Ownership
Note that all modules in an IO-Device must belong to the same PROFINET network, that is, they are all owned
by the same PROFINET Controller. I/O modules within an IO-Device cannot be split between PROFINET
Controllers.
3.1.1.2
PROFINET Controller Loading Limits
To prevent overloading of the PROFINET Controller, the maximum number of IO-Devices that can be configured
is limited, per the table below. Note that the loading threshold is different for embedded PROFINET Controllers
(in the CPE400, CPE330 and CPE100/CPE115) than in the rack-mounted IC695PNC001. The PROFINET
Controller loading limits are enforced by Proficy Machine Edition.
Devices configured with a longer update periods present smaller data loads to the PROFINET Controller. For
example, a device with an update rate of 2ms presents a load equivalent to that of two devices at 4ms.
3.1.1.3
Maximum Configuration at Each Update Rate
The maximum number of devices allowed is determined by their update rates as shown in the following
calculations:
PNC001
𝑆𝑈𝑀 (
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝐷𝑒𝑣𝑖𝑐𝑒𝑠 𝑎𝑡 𝑈𝑝𝑑𝑎𝑡𝑒 𝑅𝑎𝑡𝑒 𝑥
𝑈𝑝𝑑𝑎𝑡𝑒 𝑅𝑎𝑡𝑒 𝑥
) ≤ 8 𝑑𝑒𝑣𝑖𝑐𝑒𝑠/𝑚𝑠
CPE400 & CPE330
𝑆𝑈𝑀 (
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝐷𝑒𝑣𝑖𝑐𝑒𝑠 𝑎𝑡 𝑈𝑝𝑑𝑎𝑡𝑒 𝑅𝑎𝑡𝑒 𝑥
𝑈𝑝𝑑𝑎𝑡𝑒 𝑅𝑎𝑡𝑒 𝑥
) ≤ 2 𝑑𝑒𝑣𝑖𝑐𝑒𝑠/𝑚𝑠
Update Rate (x) per
Device (ms)
Total Number of Devices
per PNC001
Total Number of Devices per Embedded
PROFINET IO-Controller
CPE400 & CPE330
CPE100/CPE115
1
8
2
0
2
16
4
0
4
32
8
0
8
64
16
0
16
–
512
128 (total device limit)
32
8
In the case of PNC001, if the configuration exceeds the equivalent of eight devices with 1ms update rates,
Machine Edition will not store the configuration.
For the embedded PROFINET Controllers in CPE400 and CPE330, if the configuration exceeds the equivalent of
two devices with 1ms update rates, Machine Edition will not store the configuration.
For the embedded PROFINET Controller CPE100/CPE115, it is not recommended to use Update Rates below
16ms even though it is configurable using Machine Edition.
