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GFK-1503F
13.4.6
The Content of an Ethernet Global Data Exchange
ranges transmitted as a sequence of 1 to 1400 bytes of data. The content of the data is
defined for both the producer and consumers of the data. In this example, a producer sends
an 11-byte exchange consisting of the current contents of %R00100 through % R00104
followed by the current contents of %I00257 through %I00264:
Address
%R00100
%I00257
The same exchange can be configured for each consumer to suit the needs of the
application. The size of the exchange must be consistent on all nodes.
13.4.7
Data Types for Ethernet Global Data
The table below lists memory types that can be configured for produced and/or consumed
Ethernet Global Data.
Type
%R
%AI
%AQ
%I
%Q
%T
%M
%SA
%SB
%SC
%G
The Data Ranges in a Global Data Exchange
The variable ranges in an exchange are defined in the Ethernet Global Data configuration in
hardware configuration. There can be:
•
Up to 1200 data ranges for all EGD exchanges for one CPUE05.
•
Up to 100 data ranges per exchange.
•
A length of 1 byte to 1400 bytes per exchange. The total size of an exchange is the sum
of the data lengths of all of the data ranges configured for that exchange.
Ethernet Communications
Length
Type
5
WORD
1
BYTE
Description
Register memory in word mode
Analog input memory in word mode
Analog output memory in word mode
Discrete input memory in byte mode
Discrete output memory in byte mode
Discrete temporary memory in byte mode
Discrete momentary memory in byte mode
Discrete system memory group A in byte mode
Discrete system memory group B in byte mode
Discrete system memory group C in byte mode
Discrete global data table in byte mode
Description
Conveyor1 in PLC1
Conveyor1 limit switch in PLC1
Producer or
Consumer
P/C
P/C
P/C
P/C
P/C
P/C
P/C
P/C
P/C
P/C
P/C
Chapter 13
Jan 2020
233
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