Programming and monitoring modes
You can access the project in the PLC in Online Mode in the following two ways:
Programming, the PLC is reserved by the terminal; it is possible to access all the functions of the software. It is not possible to connect in programming mode to a PLC that is already reserved.
Monitoring, The PLC is not reserved by the terminal; it is not possible to modify functions of the PLC, (the program), however it is possible to modify values of the variable with the animation table.It is also possible to connect in monitoring mode to a PLC that is already reserved. Links between EFs are not animated.
Note: The command tab lets you choose the default operating mode.
Equal or Different Modes
On connection, the data in the PLC and the terminal is compared:
if the data is identical, this determines an equal online mode,
if the data is different, this determines a different online mode.
Information in the PLC
Two types of information are compared between the PLC and the terminal:
Executable information is used to identify and execute the project in the PLC:
identification of the project,
configuration,
code sections,
DDT types,
DFB types,
EF and EFB codes,
project options.
Upload information:
project upload information: graphic code for languages with LD contacts and chart of FBD function blocks, symbols of static and dynamic variables,
comments: variables, code sections, project, DFBs, etc.,
animation tables.
User functions
The user functions provided in online mode that can be accessed from the PLC menu are the following:
Function |
Description |
|---|---|
Connection/Disconnection |
Connection (change to online mode) or disconnection (change to offline mode). |
Set Address |
Access to a PLC via the network. |
Standard mode |
Choice of connection with a PLC. |
Simulator mode |
Choice of connection with a PLC. |
Compare |
Comparison of terminal/PLC projects. |
Transfer Project to PLC and Transfer Project from PLC |
Transfer of the program between the terminal and the PLC. |
Save Data from PLC to File and Restore Data from File to PLC |
Transfer of data between a file and the PLC. |
Run/Stop and Init |
Sending a command to the PLC. |
Update Upload Information |
Update the Upload information in the PLC. |
Update Init Values with Current Values |
The PLC forces the update of the initial values using current values (this applies to the variables with the save attribute). |
Project Backup |
Backs up the project in memory. |
Memory Consumption |
Access to PLC memory usage statistics. |
Diagnostics |
Access to the debug function. |
Cancel/Repeat
The Cancel/Repeat commands in the Edit menu are not available in the following cases:
Deletion of a step or macro-step in online mode.
Switch from normal view to extended view in SFC debug mode and vice-versa.