Support For Large Ethernet Global Data Configurations - GE VersaMax PLC User Manual

Support for Large Ethernet Global Data Configurations

CPUE05 System Best-Case EGD Capacity
Period of Exchange
Appendix A Performance Data
For public disclosure
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 period + 10ms
32
32
32
32
32
32
32
32
29
32
27
20
20
16
14
11
10
5
(m s)
32
32
32
28
32
24
Num ber of
16
Exchanges
Supported
8
3
6
0
Size per Exchange
(bytes)
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