The Content Of An Ethernet Global Data Exchange; Data Types For Ethernet Global Data - GE VersaMax PLC User Manual

258 GFK-1503E
For public disclosure
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:
Length
Address
%R00100 5
%I00257 1
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
Register memory in word mode
%R
Analog input memory in word mode
%AI
Analog output memory in word mode
%AQ
Discrete input memory in byte mode
%I
Discrete output memory in byte mode
%Q
Discrete temporary memory in byte mode
%T
Discrete momentary memory in byte mode
%M
Discrete system memory group A in byte mode
%SA
Discrete system memory group B in byte mode
%SB
Discrete system memory group C in byte mode
%SC
Discrete global data table in byte mode
%G
13.4.7.1 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.
Different exchanges may share some or all of the same data ranges even if the exchanges
are produced at different rates. A consumer does not have to consume all of the data from
a produced exchange. A consumed exchange may be configured to ignore specified data
ranges. (See "Selective Consumption" in chapter 6.)
Type Description
Conveyor1 in PLC1
WORD
Conveyor1 limit switch in PLC1
BYTE
Description
VersaMax PLC User Manual
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