Rockwell Automation 1794-L34 FlexLogix Controller System User Manual - Manual (Page 79)

Publication 1794-UM001G-EN-P - January 2007
Develop Applications 79
Monitor Controller Status The FlexLogix controller uses Get System Value (GSV) and Set System
Value (SSV) instructions to get and set (change) controller data. The
controller stores system data in objects. There is no status file, as in
the PLC-5 processor.
The GSV instruction retrieves the specified information and places it
in the destination. The SSV instruction sets the specified attribute with
data from the source.
When you enter a GSV/SSV instruction, the programming software
displays the valid object classes, object names, and attribute names for
each instruction. For the GSV instruction, you can get values for all the
available attributes. For the SSV instruction, the software displays only
those attributes you are allowed to set.
In some cases, there will be more than one instance of the same type
of object, so you might also have to specify the object name. For
example, there can be several tasks in your application. Each task has
its own TASK object that you access by the task name.
You can access these object classes:
For more information... The Logix5000 Controllers General Instructions Reference Manual,
1756-RM003 describes how to use the GSV and SSV instructions.
These instructions support several different attributes of information.
The Logix5000 Controllers Common Procedures Manual, 1756-PM001
provides information on how to:
• handle major faults
• handle minor faults
• determine controller memory use
• AXIS
• CONTROLLER
• CONTROLLERDEVICE
• CST
• DF1
• FAULTLOG
• MESSAGE • MODULE
• MOTIONGROUP
• PROGRAM
• ROUTINE
• SERIALPORT
• TASK
• WALLCLOCKTIME