Lenze Controller-based Automation - Manual (Page 56)

6 Remote maintenance and diagnostics
6.7 »Virtual Network Computing (VNC)«: Redirecting screen contents/entries
56
Lenze · Controller-based Automation - Visualisation · System Manual · DMS 1.5 EN · 04/2014 · TD17
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
6.7 »Virtual Network Computing (VNC)«: Redirecting screen contents/entries
For remote maintenance of a Lenze controller, IPC, and HMI, the screen contents can be redirected
to the Engineering PC. This makes it possible to view all keyboard entries/mouse movements of the
local PC on the remote PC.
The remote PC can be operated as if you were directly in front of it. However, the quality of the
remote connection is very important, since the display speed of the screen content strongly depends
on it. A bad connection may render program operation using the mouse impossible since you can no
longer track the movements of the mouse pointer. In such cases, use the command line based
protocols like FTP and telnet, depending on the function to be executed.
• Screen content can be redirected via a local connection or a remote connection.
• The »Virtual Network Computing (VNC)« software is installed on the controllers, IPCs, and HMIs
by default.
»Virtual Network Computing (VNC)«
»Virtual Network Computing (VNC)« is a software developed by Olivetti & Oracle Research
Laboratory (from 1999 AT&T), which shows the screen content of a remote computer (with the VNC
server software running) on a local computer (with the VNC viewer software running). The
keyboard/mouse movements of the local computer can be viewed on the remote computer.
Alternatively, a "read only" mode can be set, where local entries have no impact on the remote
computer.
VNC can be found under "Open source licence"; the source code is provided free of charge for
purposes of advancement. The VNC server is already installed by default on controllers 3231 C/
3241 C, p300/p500, the devices of the EL 100 HMI series, and Industrial PCs EL x800.
The Engineering PC requires the corresponding VNC viewer software. The VNC viewer software is
provided on the CD that is part of the scope of supply of the devices.
As an alternative, the VNC viewer software is available in the download area at
www.lenze.com .

Further information on how to redirect screen contents can be found in the following
documentation:
"HMI EL 1xx" device series:
• HMI EL 100 with Windows® CE - HMI for visualisation/with control technology
Controller 3200 C / p300 / p500 :
• Controller - Parameter setting & configuration