Page History

Scripts → Tutorial | Concept | How-to Guide | Reference

Create Tag Expressions

1. Navigate to Scripts → Expressions
2. Add calculated tag:

Temperature Conversion:

1. temperature conversion:

1. Add status logic:

Conditional Logic:

Create Script Task

1. Go to Scripts → Tasks
2. Add new task:

1. Click plus icon, name: ShiftCounter
2. Double-click to open Code Editor
3. Enter code (no method wrapper):

csharp

// Reset counter at shift change
DateTime now = DateTime.Now;
if (now.Hour == 6 || now.Hour == 14 || now.Hour == 22)
{
    if (@Tag.ShiftReset == false)
    {
        @Tag.Units_Previous = @Tag.Units_Produced;
        @Tag.Units_Produced = 0;
        @Tag.ShiftReset = true;
    }
}
else
{
    @Tag.ShiftReset = false;
}

Configure:

• Trigger: TimerPeriod
• RatePeriod: 60000ms 60000 (1 minute)
• Domain: Server

Build Script Class

1. Navigate to Scripts → Classes
2. Create class:

1. TankCalculations
2. Enter methods (no class declaration):

csharp

    public static double CalculateVolume(double level, double diameter)
    {
        double radius = diameter / 2;
        return Math.PI * radius * radius * level;
    }
    
    public static double FlowRateCalculateFlowRate(double volumeStart, double volumeEnd, int minutes)
{
    if {
(minutes == 0) return 0;
    return (volumeEnd - volumeStart) / minutes;
    }
    
    public static string GetAlarmTextGetStatusText(double value, double limit)
    {
        if (value > limit)
            return $"High: {value:F2} (Limit: {limit:F2})";
        else
            return "Normal";
    }

Use Class in Expression

1. Go to Scripts → Expressions

In tag expressions:

csharp

1. Create volume calculation:

Python Integration

1. Scripts → Settings
2. Enable Python
3. Create Python script:

python

Note: No @ symbol needed in expressions

Event-Driven Task

1. Create task: TemperatureMonitor
2. Configure trigger on tag change:

csharp

import numpy as np
from datetime import datetime

def calculate_statistics(values):
    """Calculate statistical values"""
    arr = np.array(values)
    return if (@Tag.Tank1_Temp > @Tag.HighLimit)
{
        'mean': np.mean(arr),
        'std': np.std(arr),@Tag.Alarm_Active = true;
        'max': np.max(arr),
        'min': np.min(arr)
    }

def predict_value(history, hours_ahead):
    """Simple linear prediction"""
    # Implementation here
    return predicted_value

# Set tag values
tags['Stats_Mean'] = calculate_statistics(history)['mean']

Event-Driven Scripts

Create event handler:

csharp

// On tag change event
public void OnTemperatureChange()
{
    if (@Tag.Tank1_Temperature > @Tag.HighLimit)
    {
        @Tag.Alarm_Active = true;
    @Tag.Alarm_Message = $"High Temperature: {@Tag.Tank1_Temp:F1}°C";
    @Tag.Alarm_Time = DateTime.Now;
    
    // Log to historian
    @Script.Class.NotificationsServerMain.SendEmail(
            "operator@company.com",
    LogEvent(
        "High Temperature AlertAlarm",
            $"Tank 1: {@Tag.Tank1_Temperature}°C"
   Temp
     );
    }
}

Configure:

• Trigger: Tag: .Tank1_TemperatureTemp
• Event: OnValueChange
• Script: OnTemperatureChange

Test Scripts

1. Start Runtime with debugger
2. Set breakpoints in scripts
3. Monitor script execution:
   • Scripts → Monitor
   • Check execution time
   • View error messages

Next Steps

• Domain: Server

Add External References

1. Go to Scripts → References
2. Add DLL if using external libraries
3. Open Code Editor
4. Click Namespace Declarations
5. Add required namespaces

Test and Debug

1. Build verification:
   • Check green checkmark in BuildStatus
   • Review BuildErrors if red X
2. Runtime monitoring:
   • Go to Scripts → Monitor
   • Check ExecutionCount
   • Review LastCPUTime
3. Debug with breakpoints:
   • Enable debug in Runtime → Build and Publish
   • Set breakpoints in Code Editor
   • Attach debugger during runtime

Step-by-step guide to add calculations, automation, and data enrichment to your TankFarm solution using Scripts module capabilities.

In this section...