Siemens PLC monitoring function - Solutions - Huaqiang Electronic Network

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The status data of plc can be monitored, read, written and forced in the program editor and status map via the options under the main menu "Debug".
The monitoring and debugging functions of the STEP7-Micro/WIN 32 software can be implemented either in the program editor window or in the form of a status diagram.
(1) Program editor window monitoring Select the "Use Execution Status" option in the main menu "Debug" to monitor the actual execution status of the PLC in the program editor window (see Figure 12-3.4). ).

You can monitor the actual execution status of the PLC in the program editor window by clicking the "Program Status Monitor" button in the toolbar or by selecting the main menu command "Debug" - "Program Status".
The actual execution status displayed by the PLC is the status of the programming component after the PLC cyclic scan is completed.
A green indication in the programming component indicates that the programming component is in the on state "1"; red indicates that the executed instruction is incorrect: gray indicates that the instruction was not scanned (skip or not).
(2) Statechart monitoring Click on the "Status Chart" icon on the navigation bar, or select the main menu "View" - "Component" - "Status Chart", Open the monitoring page of the state diagram (see Figure 12-3.5).

In "Address", enter the address of the operand (signal) to be monitored. By right-clicking on the corresponding cell, you can insert and delete the signal address.
The entered addresses can be rearranged using the status map display buttons in the toolbar.
The status of the signal will be displayed in the "Current Value" column of the status diagram. When the PLC is in STOP mode, the status shows the initial value or condition before executing the PLC program: When the PLC is in RUN mode, the status of the program under execution can be continuously monitored.