5.3. SPC Variable: Collection Characteristics

The Collection tab in the Variable Quality Characteristics Properties dialog box:

  • Enables/Disables collection.
  • identifies the data collection source.

The three collection methods are:

  • Point (Live data)
  • Logged
  • None

Point (Live Data)

Variable values can be retrieved from runtime point values.

Specifications for point value collection are as follows.

1 Point ID
2 Start element
3 End element
4 EU conversion
5 Match Point ID
6 Match value
7 Batch Point ID
8 Manual entry allowed
1 Point ID

Identifies the point data source  from which the SPC Data Collector retrieves variable values.

Point type Analog
Note: A batch point ID can be entered for a batch process.
2 Start element

(If the Point ID is an array point) Identifies the element number in the point array to start collection.

Default 0
3 End element

(If the Point ID is an array point) Identifies the element number in the point array to end collection.

Default 0
4 EU conversion

Selects between EU and raw values for the point measurement unit..

Check or clear, as follows.

Check/Clear The SPC Data Collector will use:
Check EU value(s) for the point.
Clear Raw value(s) for the point.
5 Match Point ID

Provides one data source to Identify for which of multiple variables data should be collected.

Point type Integer

Note: The same or different match point can be used for attributes, variables and defects.

6 Match value

Match point value that directs the selected SPC chart to collect data for the selected variable characteristic.

Important: During runtime, the Match point value must be the value entered in the Match value field for collection to occur. If the Match point value is different from the value entered for the selected variable, the selected SPC chart will report that there is not enough data available for it to be created.

Example

A match value to collect data for the finished decorated lead length variable is 1.

Data for the finished length is or is not collected if the selected Match point value is as follows.

Collection Match Value equals:
Is collected 1
Is not collected Anything other than 1
7 Batch Point ID

(For a batch process) Distinguish between different batches for the same product quality characteristic.

Note: The value of the Batch Point is associated with the calculated data and can be used as search criteria for charts and reports.
8 Manual entry allowed

Enables or disables manual data entry.

Do one of the following.

Check/Clear Manual data entry for SPC chart sets at runtime is:
Check Enabled
Clear Disabled

Logged

Retrieves data from an ODBC database table. Define the ODBC data source, table and column names.

Specifications for logged value collection are as follows.

1 ODBC data source
2 Database user
3 Password
4 Table ID/Column ID
5 Manual entry allowed
1 ODBC data source

Selects the database from which SPC will retrieve data.

2 Database user

Identifies the valid user name when logging into the ODBC data source.

3 Password

Identifies the required user password for logging into the ODBC data source.

4 Table ID/Column ID

Selects the database table and column from which logged data will be retrieved.

Click the Browse button to the right of the Table ID or Column ID fields.

The table and column that are selected in the Select a Table/Column browser will be entered in the Table ID/Column ID fields.

5 Manual entry allowed

Enables or disables manual data entry.

Do one of the following.

Check/Clear Manual data entry for SPC chart sets at runtime is:
Check Enabled
Clear Disabled

None

If you choose to enter your own data, do not designate a data collection source.

Check None  to prevent automatic data collection.

Manual data entry can be enabled or disabled.

Do one of the following.

Check/Clear Manual data entry for SPC chart sets at runtime is:
Check Enabled
Clear Disabled
Note: SPC automatically includes manual entry when you select None.