Logix5000 Controllers General Instructions - SLAC Confluence

176 Input/Output Instructions (MSG, GSV, SSV, IOT)GSV/SSV ObjectsWhen you enter a GSV/SSV instruction, you specify the object and itsattribute that you want to access. In some cases, there will be morethan one instance of the same type of object, so you might also haveto specify the object name. For example, there can be several tasks inyour application. Each task has its own TASK object that you accessby the task name.ATTENTIONFor the GSV instruction, only the specified size of data is copiedto the destination. For example, if the attribute is specified as aSINT and the destination is a DINT, only the lower 8 bits of theDINT destination are updated, leaving the remaining 24 bitsunchanged.You can access these objects:For Information About This ObjectAXISCONTROLLER 5-177CONTROLLERDEVICE 5-177CST 5-181DF1 5-182FAULTLOG 5-185MESSAGE 5-186MODULE 5-188MOTIONGROUP 5-189PROGRAM 5-190ROUTINE 5-192SERIALPORT 5-192TASK 5-194WALLCLOCKTIME 5-196See This Page Or PublicationControlLogix Motion Module Setup andConfiguration Manual, publication1756-UM006Publication 1756-RM003I-EN-P - January 2007