Siemens SINUMERIK 840D sl Commissioning Manual page 125

How remote diagnosis works
A machine manufacturer who provides this service has selected an appropriate topology for
a tunnel connection and will provide support when setting up the remote diagnosis.
The relevant "Ping server" must be activated on the remote PC for this purpose. This server
has the task of accepting the incoming "Ping" data (e.g. serial number) of the requesting
machine and registering the IP address of the requesting machine. If this server application
is not provided by the service provider, it is possible to configure the RCS viewer application
so that a simple "Ping" server process can be started on the RCS Viewer.
The IP address, the port, and the protocol used for this Ping server are specified by the
service provider and must be set on the machine.
The remote diagnosis is initiated by the machine. The NCU 7x0 is connected to the
appropriately configured router via an Ethernet cable and starts the remote diagnosis via the
user interface. The NCU 7x0 then sends cyclical preset "Ping" data to the remote PC and
waits for its response. The transmission of the "Ping" causes the router to establish the
connection (e.g. switched ISDN connection).
When the response is received from the remote PC, the NCU 7x0 is ready for the data
communication for the remote diagnosis. For this, a server process is started on the NCU
7x0, which is responsible for the exchange of graphic information to the remote PC and the
keyboard inputs from the remote PC.
The exchange is performed via the TCP/IP protocol and a "permanently" agreed port. A so-
called "Viewer" application (mmcR.exe) is installed on a remote PC as communication
partner. From now on, all further activities will be initiated by the remote PC.
With the arrival of the "Ping" on the PC, the IP address of the requesting NCU 7x0 is known
and the "Viewer" application (mmcR.exe) with this destination IP address can be started on a
PC. This application runs as a client. The machine can be monitored and controlled via this
remote PC.
The transfer of files between the remote PC and the machine is handled with local drives.
See also
Setting-up network connections (Page 14)
Commissioning HMI-Embedded (IM2)
Commissioning Manual, 01/2008, 6FC5397-8CP10-1BA0
8.5 Remote diagnosis "RCS Host Embedded / RCS Viewer Embedded"
Diagnostics/Service
125