BOLT (FB) ¶ FUNCTION_BLOCK FINAL BOLT This function block gives exclusive or simultaneous access to a critical section. It is based on the runtime system function SysCpuTestAndSet . Exclusive access is only possible after all simultaneous accesses have been ended. As long as there is an exclusive access, the simultaneous access calls are rejected. Simultaneous accesses are initiated with the method Enter . This means the number of accesses in the critical section is increased by one. The method Leave is required to leave the critical section. It reduces the number of accesses in the critical section by one. Exclusive access is requested with the method Reserve . This call can only be successful if the number of accesses in the critical section equals zero. If this is not the case, all new calls of the method Enter are denied to make sure the number of accesses is not increased further. If all those who previously accessed the critical section have left with the method Leave , the next call of the method Reserve will be successful. The critical section can now be accessed exclusively. When all work is done, the section has to be returned with the method Free . If exclusive access has already been granted, calls for simultaneous access are denied. Further calls for exclusive access are also denied but they are counted. The calls for simultaneous access are successful as soon as all exclusive accesses have been ended. If the method was executed successfully, TRUE is returned, else FALSE is returned. A critical section may only be accessed if the methods Enter or Reserve have returned TRUE. Methods: Enter Free Leave Reserve Structure: Enter (Method) Free (Method) Leave (Method) Reserve (Method)
BOLT.Enter (METH) ¶ METHOD Enter : BOOL InOut: Scope Name Type Return Enter BOOL
BOLT.Free (METH) ¶ METHOD Free : BOOL InOut: Scope Name Type Return Free BOOL
BOLT.Leave (METH) ¶ METHOD Leave : BOOL InOut: Scope Name Type Return Leave BOOL
BOLT.Reserve (METH) ¶ METHOD Reserve : BOOL InOut: Scope Name Type Comment Return Reserve BOOL Inout ctValue COUNT Reservation ticket number
SEMA (FB) ¶ FUNCTION_BLOCK FINAL SEMA This function block realizes a counting semaphore. It is based on the runtime system function SysCpuTestAndSet . A function block of type SEMA is used to manage limited resources. The counter of the semaphore symbolizes the number of resources available. If there is no special parameterization, the semaphore counter has the value one. The resources assigned to the semaphore are accessed with the Request method. This works as long as the counter is not zero at the time of the Request call. The counter is then reduced by one. With the method Release the resource previously called is released and the counter is increased by one. The call of the method Preset adjusts the initial counter of the semaphore in accordance with the requirements. If the method was executed successfully TRUE is returned, else FALSE is returned. A resource may thus only be used if the call Request returns TRUE. InOut: Scope Name Type Initial Input Const ctPreset COUNT 1 Properties: Preset Methods: Init Release Request Structure: Init (Method) Preset (Property) Release (Method) Request (Method)
SEMA.Init (METH) ¶ METHOD PROTECTED Init
File and Project Information ¶ Scope Name Type Content FileHeader creationDateTime date 17.05.2017, 16:37:28 companyName string 3S-Smart Software Solutions GmbH libraryFile CAA_TickUtil_Extern.library primaryProject True productName CODESYS productProfile CODESYS V3.5 SP10 Patch 2 contentFile CAA_TickUtil_Extern.clean.json version version 1.0.1.1 ProjectInformation Depends on PS bool False Depends on RTS False Released True LastModificationDateTime date 01.01.1601, 00:53:00 LibraryCategories library-category-list Intern|CAA|System Author string 3S - Smart Software Solutions GmbH Company CAA Technical Workgroup DefaultNamespace TICKU Description See: Description LanguageModelAttribute qualified-access-only Placeholder CAA TickUtil Project CAA_TickUtil_Extern Title CAA TickUtil Extern SpecVersion version 3.0.0.0 Version 3.5.7.0
Library Reference ¶ This is a dictionary of all referenced libraries and their name spaces. CAA Types Extern ¶ Library Identification ¶ Placeholder: CAA Types Default Resolution: CAA Types Extern, * (CAA Technical Workgroup) Namespace: CAA Library Properties ¶ LinkAllContent: False Optional: False QualifiedOnly: True SystemLibrary: False Key: CAA Types
CAA Tick Extern Library Documentation ¶ Company CAA Technical Workgroup Title CAA Tick Extern Version 3.5.7.0 Categories Intern|CAA|System Namespace TICKS Author 3S - Smart Software Solutions GmbH Placeholder CAA Tick Description 1 ¶ Supports the acces to a high resolution timestamp and provide the CAA.TICK type. Contents: ¶ CAA Tick Functions GlobalConstants GetSupplierVersion (Function) VersionConstants (GVL) Indices and tables ¶ 1 Based on CAA_Tick_Extern.library, last modified 01.01.1601, 00:53:00. LibDoc 4.4.0.0-b.27 The content file CAA_Tick_Extern.clean.json was generated with CODESYS V3.5 SP10 Patch 2 on 17.05.2017, 16:37:27.
