1 Overview
Specify the communication mode at the communication channel level when you configure
the application. Setting up the communication channel to use the modem means that dialing
and connecting to the remote device is fully transparent to the OPC client application.
Modem connections and direct serial communication work similarly.
1.3.2 Interruption tolerance
In case a connected device stops responding, for instance because of a line interruption,
the optimized communication is carried on for the still connected devices. Thus, the
communication breakdown does not influence the time-out or response behavior of the
devices which are still online. If the device starts being responsive again, the data transfer
from / to the previously disconnected PLC is reinitialized and carried out normally.
1.3.3 Communication driver test and protocol adaptation
If the server or application created with the server should be tested, the user can use a
simulation driver to simulate reading and writing from and to virtual devices.
To test MEWTOCOL protocol communication, the channel settings made by the user
can be tested directly in the server application. Furthermore, the user can influence the
type of protocol (use of RD commands instead of MD commands) to be used to prevent
interdependencies with other applications using the MEWTOCOL protocol, for instance.
For detailed information, please refer to the
dialog of the Tools menu in the online
help.
1.3.4 User interface
A modern, intuitive
allows you to configure the server. While creating the
application, sophisticated user assistance is available at any time. Various hints and error
notifications help you configure the server. Online documentation is omnipresent to clarify
the server configuration application. You are warned of possible faulty settings or changes
while the server is running. Wizard dialogs assist you in creating and altering elements.
The server allows you to change the display of the main window. The server can appear
minimized as an icon in the system tray or maximized on the desktop. If started by an OPC
client, the server is automatically started minimized in the tray icon, but can be brought to the
foreground by simply double clicking the icon in the
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