Automatic control function programming manual ladder language

Variables
3 Variables
3.1 Principle of Exchanges 3 - 5
3.2 Variable % - Mnemonic 3 - 6
3.3 Variable % 3 - 6
3.3.1 Symbol Field 3 - 6
3.3.2 Logical Number Field 3 - 6
3.3.3 Size Field 3 - 7
3.3.4 Index Field 3 - 7
3.3.4.1 Indexing with a Bit Variable 3 - 7
3.4 Mnemonic 3 - 8
3.4.1 Coercion Field 3 - 8
3.5 Common Internal Variables Saved 3 - 8
3.6 Common Internal Variables Not Saved 3 - 8
3.7 I/O Card Interface Variables %I and %Q 3 - 9
3.7.1 Structure of Read Variables %Irc 3 - 10
3.7.1.1 Card Diagnostic Part 3 - 10
3.7.1.2 Input Image Part 3 - 10
3.7.2 Structure of Write Variables %Qrc 3 - 10
3.7.2.1 Card Configuration Part 3 - 10
3.7.2.2 Output Image Part 3 - 10
3.7.3 Card Diagnostic Variables 3 - 10
3.7.3.1 Card Identifier %Irc3E.W 3 - 10
3.7.3.2 Card Status %Irc3C.W 3 - 11
3.7.3.3 Dialogue Error Counter %Irc3A.W 3 - 11
3.7.3.4 Bus Status %Irc39.B 3 - 11
3.7.4 Card Configuration Variables 3 - 12
3.7.4.1 Card Identifier %Qrc3E.W 3 - 12
3.7.4.2 Logical/Geographic Address Option
%Qrc3D.B 3 - 12
3.7.4.3 Card Priority %Qrc3C.B 3 - 13
3.7.4.4 Watchdog %Qrc3B.0 3 - 14
3.7.4.5 NC Access Enable %Qrc3B.1 3 - 14
3.7.5 Physical Organisation of Variables
%I and %Q 3 - 15
3.7.5.1 Physical Organisation of Variables
%I and %Q of Rack r 3 - 15
3.7.5.2 Physical Organisation of Variables
%I and %Q of the Different Racks 3 - 16
3.7.6 Rack and Card Identifiers 3 - 17
3.7.6.1 Card Identifiers 3 - 17
3.7.6.2 Rack Identifiers 3 - 17
3.7.7 Image Part of 32 Discrete Input Card 3 - 18
3.7.8 Image Part of the 32 Discrete Output Card 3 - 19
3.7.9 Image Part of the 32-24 I/O Discrete I/O
and 32-24 I/O Cards 3 - 20
3.7.10 Image Part of the 64-48 I/O Card 3 - 22
3.7.11 Image Part of the Basic Operator
Panel Card 3 - 24
3.7.12 Image Part of the Extension Operator
Panel Card 3 - 25
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