Configuration Parameters Linked to Global Data
Original instructions
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Introduction
The TSX ETY4103/PORT/5103 modules and the Ethernet link of the TSX P57 6634/5634/4634 have configuration parameters linked to Global Data:
Parameters
Global Data configuration
Group address
Group name
Distribution Period
Validity time out
Multicast Filtering
NOTE: Elsewhere in this guide is detailed information about configuring Global Data General Parameters.
Publish/Subscribe Variables
Association between Global Data variables (network variables) and application variables is carried out in the Control Expert variable editor.
Each application variable published or subscribed (Global Data field) in a Distribution Group (Group field) is link to a Global Data item (network variable).
Each Global Data item has a unique identification (Data ID) within a Distribution Group. The rank of the status bit in the HealthBit zone of Global Data corresponds to the identifier (Data ID) of the Global Data.
Properties
The following table provides Global Data properties.
Type
Value
Max. number of publications
1
Size of a variable at publication
1 to 512 words
Max. number of subscriptions
64
Maximum variable size at subscription
Total of 2K words