194 Rockwell Automation Publication 5069-UM002A-EN-P - January 2019
Chapter 8 Develop Control Applications
Monitor Controller Status
The CompactLogix 5480 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. Both instructions are available from the Input/Output tab of the
Instruction toolbar.
Figure 38 - GSV and SSV Instructions for Monitoring and Setting Attributes
When you add a GSV/SSV instruction to the program, the object classes,
object names, and attribute names for the instruction are shown. For the GSV
instruction, you can get values for the available attributes. For the SSV
instruction, only the attributes that you can set are shown.
Some object types appear repeatedly, so you 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.
The GSV and SSV instructions monitor and set many objects and attributes.
See the online help for the GSV and SSV instructions.
To Next Page
Loading...
Need help?
General
