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6 result(s) for Ctrl Variables

• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  4.1.1.2 Ctrl Variables
  Ctrl Variables Ctrl Variables are only assigned to explicit hardware addresses (e.g. input and outputs) in Ctrl Configurations , Ctrl Resources or Ctrl Programs . In this way a high level ... hardware independency is created, supporting the reusability of the software. The scopes of the Ctrl Variables are normally limited to the organization unit in which they are declared, e.g. local
• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  4.3 Introductory Example
  Ctrl Function Blocks consist of a name, Ctrl Variables with associated data types (input, output, internal), and a body containing the algorithm to be executed. These data are represented ... standard counter Ctrl Function Block . CTU_INT contains three input Ctrl Variables (CU - counter up, R - reset, PV - primary value), one local Ctrl Variable (PVmax) and two output Ctrl Variables
• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  5 Use cases
  monitoring data of Ctrl Configurations, Ctrl Resources, Ctrl Tasks, Ctrl Programs, Ctrl Function Blocks, Ctrl Variables , and their ObjectTypes represented in the OPC UA Server. Example 1: In a brewery ... Operation inherits the functionality of observation and extends it. Operation comprises writing data of Ctrl Variables represented in the OPC UA Server and execution control of Ctrl Programs and Ctrl
• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  7.1.1 Overview
  Address Space . It introduces Objects to group Ctrl Resources and different types of Ctrl Variables . The CtrlConfigurationType is derived from the TopologyElementType defined in OPC 10000-100 . Figure 15 shows ... allowed, e.g. during a configuration process. The FunctionalGroup GlobalVars contains the corresponding list of Ctrl Variables declared by the key word VAR_GLOBAL. The FunctionalGroup AccessVars contains the corresponding list
• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  9.1 Common Attributes
  defined in this specification. NodeClass Mandatory NodeClass The NodeClass is Variable for all Ctrl Variables . BrowseName Mandatory QualifiedName The BrowseName is a QualifiedName composed of a name string ... display the name of the Node . The name part is generated from the Ctrl Variable name. The namespace part depends of the scope where the Variable is defined. Chapter
• OPC-30000 – OPC UA for Programmable Logic Controllers based on IEC61131-3
  9.3.1 General
  Value of the Variable is an array and how many dimensions the array has. Ctrl Variables declared as scalar type have the ValueRank -1. Ctrl Variables declared with