CONTROWAVE软件培训3-change.pptVIP

Starting ControlWave Designer Example:Creat a sample programme * DESIGNER Bristol Babcock 软 件 培 训 Physical Hardware RTU_CFG is the type of code generation required for the controller – for ControlWave this is always IPC_30, RTU_RESOURCE defines the type of run-time system used Tasks are the actual mechanism by which programs are executed. System_Variables define certain variables which maintain statistics about the project. IO_Configuration defines the inputs and outputs of the process I/O boards in the ControlWave controller and optionally the ControlWave Ethernet I/O. Tasks Tasks determine the time scheduling of the programs associated with them. This means that programs have to be associated to tasks. The settings of the task determine the time scheduling. IEC 61131-3 describes different time scheduling which lead to three different task types: Cyclic tasks are activated in a certain time interval and the program is executed periodically. Event or interrupt tasks are activated if a certain event has happened. System tasks will be activated if an error occurs when executing the PLC program. System tasks are associated with system programs. Each task has a certain priority. In so called preemptive scheduling systems, an active task with low priority is interrupted immediately, when a task with higher priority becomes active due to a certain event. In systems with non-preemptive scheduling, task interruptions by tasks with higher priority are not possible. ?Global variables 10000 Local Variables 15000 Resources in the project tree 100 Tasks per resource 15 Program instances per task 500 Embedded libraries 15 Programs per library