WinSPC.com 
Support & Resources Tips & Tricks Matching External Data Source Readings with Collection Plan Steps
Support & Resources Tips & Tricks Matching External Data Source Readings with Collection Plan Steps Tips & Tricks
Matching external data source readings with collection plan stepsReadings from an external data source must, in the end, be matched with the appropriate step in a collection plan. When the data source feeds only one step, this is assured.  When the data source feeds multiple steps, however, ambiguity is introduced.  The most common methods for resolving this ambiguity are:
The channel number and location methodUse this method when:
 When these conditions are met, all that needs to be done to ensure readings get to the step for which they are intended is to configure the step to accept readings with the channel number and location that corresponds to the step’s ultimate data source (the device or text file, in other words, that feeds the intermediary device or text file). For instructions on doing this, see Setting Up WinSPC-->Setting Up Devices and Setting Up WinSPC-->Setting Up Collection Plans-->Setting Up Collection Plan Steps in WinSPC’s online Help. The reasonable limit methodConsider using this method when:
 Under these circumstances, each step can be setup with a test and trigger that rejects readings outside of its reasonable limits. Since the reasonable limit ranges are non-overlapping, a reading will be acceptable to, at most, one step. (It is possible, of course, for a reading to fall outside the reasonable limits of all steps and, consequently, be completely rejected.) For instructions on defining reasonable limits, see Setting Up WinSPCŕSetting Up Parts Or ProcessesŕSetting Up VariablesŕSetting Up Variable Specifications (Advanced) in WinSPC’s online Help. For instructions on defining tests and triggers, see Setting Up WinSPC-->Setting Up Collection Plans-->Setting Up Collection Plan Steps in WinSPC’s online Help. The modified single-device handling methodConsider using this method when:
When the above conditions for this method are met, it is possible that ambiguity can be resolved by modifying the routing of external data source readings. To do this, check the Modified Single Device Handling check box on the Collection Plan Options tab of the Collection Plan dialog.  By default, WinSPC routes all readings from an external data source to all the steps in a collection plan configured to collect data from that source. Checking this Modified Single Device Handling check box causes WinSPC to initially route a reading from the data source to the currently active collection plan step only. If this step accepts the reading, WinSPC takes no further action.  If, however, the current step rejects the reading, WinSPC searches the collection plan for a step with a random collection method (as opposed to a sequential collection method). In this case, one of three things will happen:
|
Free technical white papers to make choosing a quality solution for your organization easier.
