Preconditions / troubleshooting

In order to establish a connection to a remote system, the following preconditions must be fulfilled:

zenon (at least version 6.22 or higher) must be installed.
The Remote Desktop service (zenVNCSrv.exe) must be activated at the PC. You can activate the service using the Remote Desktop configuration software (see also Konfiguration). You can check if the service is running by using the Windows task manager.
A user must be logged in at the remote PC and the PC must not be locked. See chapter Limitations.
In Windows CE, you must start the Remote Desktop service zenVNCSrvCE.exe, either manually or via the Windows CE startup options. Please look up the documentation of the device to find out how you can activate these startup options. You can check if the service is running by using the Windows CE task manager (if available).
The service must be registered in the Windows Firewall and in all other firewalls. The ports 5600 (http port) and 5610 (Remote Desktop port) must be registered. You can check if these ports are registered and activated by establishing a Telnet connection from another PC to port 5600 and 5610. For that, start the command prompt ( cmd.exe) and enter the following command:
telnet RemotePCName 5610.
If the connection is successful, a black window appears.
In Windows Vista, Telnet is not installed by default. You can install the program by performing the following steps:
Click on Start > Control Panel > Programs and then on 'Turn Windows features on and off'.
Activate the check box 'Telnet client' in the Windows features list and click on 'OK'.
The ports 5600 and 5610 should not be used by other programs. If they are used by other programs, the system will randomly select other ports. You can check the port assignment with the Windows command netstat -n -a -o in the command prompt. You can find out the process ID of the Remote Desktop service zenVNCSrv.exe in the tab "Processes" of the task manager. If the ID is not visible, you can activate the column "PID (Process ID)" in the menu "View - Select columns...".
If you establish the connection via the Editor, make sure that TCP/IP is set as the transport medium in the Remote Transport. You also have to enter a computer as the target system, either for Remote Transport or as project server.
Windows Vista's fast user switching is not supported. It leads to disconnection. See chapter Limitations

Info

Deactivated HTTP server:

If you have deactivated the HTTP Server, you can still reach the login page via a browser refresh.
The page will then be routed from the normal HTTP port (5600) to the Remote Desktop port (5610). This way you can still login and have full access. To avoid access, change the password or block the Remote Desktop port (5610).