GE VersaMax PLC, Руководство пользователя

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Support for Large Ethernet Global Data Configurations
The VersaMax CPUE05 Ethernet Global Data (EGD) feature supports a configuration of
up to 32 exchanges, at periods as short as 10 ms, with data sizes as large as 1400 bytes.
However, the CPUE05 cannot support a configuration in which every aspect of EGD is
maximized. The chart below indicates the maximum number of EGD exchanges that the
CPUE05 can realistically support of a certain size and data refresh period under
Best-
Case conditions. These numbers will scale downwards based on the size of the user
program, the presence of other Ethernet traffic, etc.
The term Best-Case indicates the following setup parameters apply:
• No user logic is present, so the logic sweep time is nearly 0
• There are no modules present in the system.
• No other Ethernet traffic present on the network.
• Assumed data refresh timeout is 2 × refresh 10ms
0
8
16
24
32
32
27
20
14
10
5
32
29
20
16
11
6
32
32
32
32
32
3
32
32
32
32
32
28
Size per Exchange
(bytes)
Num ber of
Exchanges
Supported
Period of Exchange
(m s)
CPUE05 System Best-Case EGD Capacity
Appendix A Performance Data GFK-1503E User Manual 315
For public disclosure