1. What is' state '
1. What is' state '
The term 'status' refers to information about the current value and energy flow status of PLC data when a program is executed in a PLC. PLC data values can be read, written, and forced using the program editor window, monitoring list, and timing diagram.
During the execution of the control program, there are three different ways to view the dynamic changes in PLC data:
| Monitoring Method | Description |
|---|---|
| Program Editor | Display Status Data in the Program Editor Window: The current PLC data value will be displayed inside/next to the STL statement or LAD/FBD component drawing that references the data. |
| Monitor List | Display Status Data in Table: Each row specifies a PLC data value to be monitored. You can specify the memory address, data format, current value, and new value (writing the new value will immediately affect the PLC). |
| Sequence diagram | Track status data by plotting PLC data that changes over time. |