Monokot Server 1.x
  • What is Monokot Server?
  • Quickstart
  • 🐸Basics
    • Supported OS and Hardware
    • Installation
    • Licensing
    • OPC UA
      • UA TCP Endpoint
      • UA Settings
      • Client Certificates
      • Aliases
      • Access to Object Settings
      • Troubleshooting
    • Security Certififcate
    • Users & Roles
    • Administrator GUI
      • Event Log
      • Users in Monokot Server Administrator
      • Roles in Monokot Server Administrator
    • Startup Parameters
  • 🦊Tags & Devices
    • Devices
      • Diagnostics
      • Devices in the Monokot Server Administrator
    • Tags
      • Parameters
      • Change Trigger
      • Tags in Monokot Server Administrator
        • Go Online
        • Group Action
        • Import & Export
    • Modbus Connectivity
      • Parameters
      • Addressing
      • Diagnostics
    • Siemens Connectivity
      • Parameters
      • Addressing
      • Access to DBs area in S7-1200/S7-1500
    • IEC 60870-5-104 Connectivity
      • Parameters
      • Addressing
      • Time Conversion
      • Diagnostics and Commands
    • OPC UA Connectivity
      • Parameters
      • Addressing
      • Diagnostics
      • How to: Importing OPC UA items
      • How to: Pulling Security Certificate
    • InfluxDB Connectivity (Connector)
      • Parameters
      • Addressing
      • Query Result and Data Mapping
      • Diagnostics
      • How to: Configure for InfluxDB 2.x
    • SNMP Connectivity
      • Parameters
      • Addressing
      • UDP Considerations
  • 🐺Time Series & Stores
    • Stores
      • Backlog
      • Diagnostics
      • Stores in Monokot Server Administrator
    • Time Series
      • Parameters
      • Deadband
      • Sampling
      • Last Sample Repeat
      • Time Series in Monokot Server Administrator
        • Group Action
        • Import & Export
    • InfluxDB Connectivity (Store)
      • Parameters
      • Addressing
      • Data Structure
      • About Metadata
      • Diagnostics
      • How to: Configure for InfluxDB 2.x
    • PostgreSQL Connectivity
      • Parameters
      • Addressing
      • Database Design
      • Data Compression
    • REST Connectivity
      • Parameters
      • Addressing
      • Message Script
      • RestRequestMessage
      • DataContext
      • TimeSeries
  • 🐻Scripts
    • Overview
    • Expression
      • Parameters
      • Import & Export
      • Go Online
    • Programming Examples
      • How to: Calculate Arithmetic Mean
      • How to: DoNothing
      • How to: Writing to Tag
      • How to: Inverting Bits
      • How to: Execute SQL
      • How to: Run Ping
      • How to: Do Simulation
      • How to: String Formatting
      • How to: OPC UA Method
      • How to: Initialize Device Settings from File
    • API
      • Bundle
      • BundlePair
      • Context
      • DataMap
      • DataMapPair
      • DataTriggerInfo
      • Expression
      • MosCrypto
      • MosDirectories
      • MosFiles
      • MosOdbc
      • MosOdbcReader
      • MosProcess
      • MosProcessExecuteResult
      • MosText
      • MosUtils
      • ValueState
Powered by GitBook
On this page
  1. Scripts
  2. Programming Examples

How to: Do Simulation

PreviousHow to: Run PingNextHow to: String Formatting

Last updated 2 years ago

The guide demonstrates how to create expressions that generate a sinusoidal signal and a saw signal for simulation and testing purposes.

Open Monokot Server Administrator and double-click Scripts on the Server Explorer pane. Click New Expression and set the name Sin for the expression that appears. Insert the following code into the expression code editor:

// "token" is a property in which you can put a custom value that 
// will be available during the next code execution
context.token += 0.1;

var value = Math.sin(context.token) * 50;
return value;

Go to the Triggers tab and click Add Periodic. Now, we have created an expression that will be executed every 500 ms.

In the same way, create a second expression named Saw and specify a periodic trigger for it, but to simulate the saw signal, use the following code:

// ...by default, token is null
if (context.token == null)
    context.token = 0;
else context.token += 1;

if (context.token > 50)
    context.token = -50;

var value = context.token;
return value;

In order for the changes to take effect on the server, click the Sync button. Now, if you write the data (for example, in InfluxDB) generated by these expressions, you will see something similar as in the figure below:

🐻