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common method patterns

1. device control methods​

start/stop operations​

// Start a motor
msg.payload = {
    "Speed": 1500,        // RPM
    "Direction": "Forward",
    "RampTime": 10.0      // seconds
};
msg.objectId = "ns=2;s=Motor1";
msg.methodId = "ns=2;s=Start";
// Stop a motor
msg.payload = {
    "EmergencyStop": false,
    "RampTime": 5.0       // seconds to decelerate
};
msg.objectId = "ns=2;s=Motor1";
msg.methodId = "ns=2;s=Stop";

configuration methods​

// Configure PID controller
msg.payload = {
    "Kp": 1.2,           // Proportional gain
    "Ki": 0.1,           // Integral gain
    "Kd": 0.05,          // Derivative gain
    "Setpoint": 50.0,    // Target value
    "OutputMin": 0.0,    // Minimum output
    "OutputMax": 100.0   // Maximum output
};
msg.objectId = "ns=2;s=PIDController";
msg.methodId = "ns=2;s=Configure";

2. process methods​

recipe execution​

// Execute a production recipe
msg.payload = {
    "RecipeId": "RECIPE_001",
    "BatchSize": 1000,    // kg
    "Priority": "Normal",
    "OperatorId": "OP123"
};
msg.objectId = "ns=2;s=BatchReactor";
msg.methodId = "ns=2;s=ExecuteRecipe";

calibration methods​

// Calibrate a sensor
msg.payload = {
    "ReferenceValue": 100.0,
    "CurrentReading": 98.5,
    "CalibrationType": "TwoPoint"
};
msg.objectId = "ns=2;s=TemperatureSensor";
msg.methodId = "ns=2;s=Calibrate";

3. maintenance methods​

diagnostic methods​

// Run system diagnostics
msg.payload = {
    "TestLevel": "Full",
    "IncludeHistory": true,
    "GenerateReport": true
};
msg.objectId = "ns=2;s=SystemDiagnostics";
msg.methodId = "ns=2;s=RunDiagnostics";

reset methods​

// Reset alarm conditions
msg.payload = {
    "AlarmIds": ["ALM001", "ALM002", "ALM003"],
    "OperatorId": "MAINT001",
    "Reason": "Maintenance completed"
};
msg.objectId = "ns=2;s=AlarmManager";
msg.methodId = "ns=2;s=ResetAlarms";

next Steps​

After mastering basic method calls, explore: