You can use Alarm settings to warn you if a particular process is slightly off, even when production has not exceeded its control limits on a regular basis. This enables you to anticipate and handle potential problem areas in your production facility.
Use the Alarm tab in the Attribute Quality Characteristics Properties box to specify the:
Type of alarm that will be
triggered.
Setpoint ID.
Control test criteria that
will initiate alarms or change Setpoints.
Alarms and Setpoints
When one of the control tests meets your criteria for issuing a warning, it will generate the type of warning you configure, including:
An alarm to alert operators
that criteria have been met for one of the control tests.
If alarms are generated for more than one control test, they will stack up and be deleted according to specifications you enter in the CIMPLICITY Alarm Configuration.
A Setpoint that will change
to the number (0-9) of the Attribute characteristic tests, alarm
state (1-8) and Upper Specification Limit (0). Setpoints provide
you with a way to automate corrective action. You can write scripts
that trigger the appropriate action whenever the criteria have been
met for one of the control tests.
The value of the Setpoint reflects that last test for which an alarm was triggered.
To specify an alarm and Setpoint:
Select the Alarm tab.
You can select the $SPC_ALARM system Alarm ID, or you can create your own alarm in the Alarm ID field. Use the SPC_ALARM type when creating your own alarm. Do one of the following:
Click 
to browse for an existing Point
in the Select a Point dialog box, or
Click 
to designate a New Point.
The alarm message for SPC alarms consists of the following strings:
Document Name.
Product Name.
Quality/Defect
Characteristic Name.
A description of the
control check that triggered the alarm.
The value of the sample
that triggered the alarm.
In the Setpoint ID field, indicate a Point to be set when an SPC alarm occurs. A Setpoint will change to 0-9 of the Attribute QC tests: Alarm state 1-8 and Upper Specification Limit 0. Do one of the following:
Click to browse for an existing Point
in the Select a Point dialog box, or
Click to designate a New Point.
Check the Alarm enabled box to activate alarming for the attribute; clear to disable option.
Go to next section, "Criteria for Attribute Control Tests," for details.
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Step 4. Add and configure attribute quality characteristics. |
