Configuration of Parameters Linked to Global Data
Original instructions
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Introduction
In addition to the general Global Data parameters, you must also configure the Global Data variables in the data editor.
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 linked 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 Health Bit zone of Global Data corresponds to the identifier (Data ID) of the Global Data.
Global Data Properties
Type
Value
max. number of publications
1
size of a variable at publication
1 to 512 words
size of a variable at subscription
1 to 512 words
max. number of subscriptions
64 (see note)
max. variable size at subscription
total of 2K words
Note: The combined total number of variables is 64. Therefore, when 1 publication variable is configured only 63 subscription variables are available.