PLC Qualification Judgment

Introduction

PLCQualificationJudgmentActivity is a PLC qualification judgment node used to read the qualification signal from parameters collected from the PLC and judge whether the product is qualified.

This node relies on the qualification signal returned by the PLC for judgment, suitable for scenarios where the equipment (PLC) completes quality detection and returns the result.

Configuration Items

This node has no additional configuration properties and inherits common properties from the base class.

Business Logic

Execution Flow

Start
  │
  ▼
Call PLCJudgmentAsync Method
  │
  ├─► Get Parameter Collection Data
  │
  ├─► Read Qualification Signal Variable
  │     │
  │     └─► Variable Name: OutboundQualityVariable or Default
  │
  ├─► Parse Qualification Signal Value
  │     │
  │     ├─► 1 or true → Qualified
  │     ├─► 2 → Unqualified
  │     └─► 0 or other → Unknown
  │
  ├─► If Unqualified, Match NG Reason
  │
  ▼
Set Flow Data Items
  │
  ├─► QualityResultValue = Result Value
  │
  └─► QualityResultReason = Unqualified Reason
  │
  ▼
End

Qualification Signal Parsing

Signal Value	Parse Result	Description
1	Qualified	Product detection qualified
true	Qualified	Boolean true converted to qualified
2	Unqualified	Product detection unqualified
0	Unknown	Unable to determine result
Other	Unknown	Unparsable value

NG Reason Matching

When judged as unqualified, the system attempts to match specific reasons from the NG reason list in the process model:

1. Traverse NG reasons defined in process model.
2. Read value of corresponding variable.
3. Compare with judgment value.
4. Record NG reason if matched.

Flow Data Items

Input Data Items

Data Item	Type	Description
ApplicationData	ProcessModel	Process Model, containing NG reason definitions
ParameterCollectData	IReadOnlyDictionary<string, IVariableValue>	Parameter Collection Data
OutboundQualityVariable	string	Qualification Signal Variable Name (Optional)

Output Data Items

Data Item	Type	Description
QualityResultValue	int	Quality Result Value (1=Qualified, 2=Unqualified, 0=Unknown)
QualityResultReason	string	Unqualified Reason

Usage Example

Basic Configuration

<PLCQualificationJudgmentActivity Name="PLC Qualification Judgment" />

Specify Qualification Signal Variable

Specify qualification signal variable name via flow data item:

<VariableWriteActivity Name="Set Qualification Signal Variable">
  <Variable>OutboundQualityVariable</Variable>
  <Value>QualityResult</Value>
</VariableWriteActivity>

<PLCQualificationJudgmentActivity Name="PLC Qualification Judgment" />

Typical Flow Configuration

Parameter Collect → PLC Qualification Judgment → Condition Branch (Qualified/Unqualified)

<ParameterCollectActivity Name="Parameter Collect">
  <!-- Collect PLC Qualification Signal -->
</ParameterCollectActivity>

<PLCQualificationJudgmentActivity Name="PLC Qualification Judgment" />

<ConditionActivity Name="Quality Judgment">
  <Condition>Flow.DataItems["QualityResultValue"] == 1</Condition>
  <TrueBranch>Qualified Handling</TrueBranch>
  <FalseBranch>Unqualified Handling</FalseBranch>
</ConditionActivity>

Difference from Local Judgment

Feature	PLC Qualification Judgment	Local Qualification Judgment
Subject	PLC/Equipment	MES System
Basis	Qualification Signal Variable	Recipe Parameter Limits
Scenario	Equipment Detection	System Verification
Configuration	Simple	Requires Recipe Parameters

Notes

1. Parameter Collect node must be executed before this node.
2. Qualification signal variable must exist in collected data.
3. NG reason matching requires pre-configuration in process model.
4. If signal cannot be parsed, result is "Unknown".