Develop a time stamping application in PlantStruxure? - Schneider ...
Develop a time stamping application in PlantStruxure? - Schneider ...
Develop a time stamping application in PlantStruxure? - Schneider ...
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2-Selection<br />
2. Selection<br />
2.1. Selection criteria<br />
This chapter describes the selection of the components needed to build a <strong>time</strong><br />
<strong>stamp<strong>in</strong>g</strong> <strong>application</strong> and provides a solution list.<br />
Each automation control project has specific requirements and constra<strong>in</strong>ts, such as<br />
the size of the plant, control complexity, and project budget. The <strong>time</strong> <strong>stamp<strong>in</strong>g</strong><br />
resolution is a very important requirement of the project. The requirements and<br />
constra<strong>in</strong>ts def<strong>in</strong>ed <strong>in</strong> the project specification are used as guidel<strong>in</strong>es to select the<br />
<strong>time</strong> <strong>stamp<strong>in</strong>g</strong> solution. There are three criteria for the <strong>time</strong> <strong>stamp<strong>in</strong>g</strong> <strong>application</strong><br />
selection:<br />
• Time resolution<br />
• System scale (complexity)<br />
• Cost<br />
2.2. Selection steps<br />
Accord<strong>in</strong>g to the selection criteria, the <strong>time</strong> <strong>stamp<strong>in</strong>g</strong> solution is developed <strong>in</strong> four<br />
steps:<br />
• Select<strong>in</strong>g a <strong>time</strong> <strong>stamp<strong>in</strong>g</strong> method and mode<br />
• Select<strong>in</strong>g a PAC platform<br />
• Select<strong>in</strong>g an I/O architecture<br />
• Select<strong>in</strong>g a CPU task mode<br />
2.2.1. Select<strong>in</strong>g a <strong>time</strong> <strong>stamp<strong>in</strong>g</strong> method and mode<br />
Two different <strong>time</strong> <strong>stamp<strong>in</strong>g</strong> methods can be used, <strong>time</strong> stamped by module or <strong>time</strong><br />
stamped by program.<br />
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