Publication 1734-UM015A-EN-E - November 2009
DeviceLogix Capabilities
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Enable Line feature
The Enable Line feature can be supported by each instruction type in the
Function Block Editor. When an instruction supports the Enable Line feature,
that particular instruction can only be executed when Enable Line is on;
otherwise, that instruction maintains the data from the last data scan. In this
manner, functions can be executed conditionally based on the state of the
Enable input. Under normal conditions, the Enable output will have the same
value as the input, passing the enable information to the next instruction.
Certain error conditions that occur within the processing of a function block
may cause the Enable output to go false.
If the Enable Line feature is used, EnableIn can be connected to an input I/O
tag or the output of another function block. The EnableIn input will retain the
value of the source that it is bound to.
If the Enable Line feature is not needed, the EnableIn input can use a constant
value which can be set on each instruction’s property page. By default, this
constant will allow execution of the function.
Summary of Contents for 1734-8CFGDLX
Page 6: ...Publication 1734 UM015A EN E November 2009 4 Table of Contents Notes ...
Page 10: ...Publication 1734 UM015A EN E November 2009 8 Preface Notes ...
Page 16: ...Publication 1734 UM015A EN E November 2009 14 Introduction Notes ...
Page 109: ...Publication 1734 UM015A EN E November 2009 Peer Data Maps 107 Notes Allen Bradley HMIs ...
Page 110: ...Publication 1734 UM015A EN E November 2009 108 Peer Data Maps Notes ...
Page 111: ...Allen Bradley HMIs ...
