Technical data

Configuration software for SINAUT ST7
1.5 Setting TIM module parameters
Software
40 System Manual, 07/2009, C79000-G8976-C222-07
● GPRS connection mode
You can either set parameters for the Ethernet interface for IP communication according
to the S7 protocol ("neutral" setting) or for data transmission by GPRS. If you are
connected to a GPRS network, you have the alternative of transmission using the GPRS
modem MD741-1 or for simple Internet communication with the MSC protocol using the
GPRS modem MD720-3.
An Ethernet interface cannot operate at the same time with the S7 protocol and the MSC
protocol.
In contrast to a normal "flat" Ethernet network in which every connected subscriber can
communicate with every other subscriber, there are only point-to-point connections
between station and master in GPRS networks. A direct connection from station to station
is not strictly possible. Messages must be forwarded in GPRS networks via the master.
To allow this, an Ethernet TIM can be used in the master that handles the routing of data
messages between stations. To be able to establish the correct route in the GPRS
network during configuration of the SINAUT connections, you will need to assign one of
the following options to the Ethernet interface of the TIM on the GPRS network:
–
No GPRS connection
On the Ethernet interface of the TIM, there is normal TCP/IP communication with the
ST7 protocol; in other words, no subscriber is connected via GPRS and the MSC
protocol is not enabled.
–
GPRS master
In the role of "GPRS master", the Ethernet interface represents the highest level in the
GPRS network hierarchy. Messages from TIMs in the role of "GPRS station" or
"GPRS node station" to other stations in the network can then be routed over this
interface.
–
GPRS node station
In the role of "GPRS node station", the Ethernet interface is subordinate to the "GPRS
master". This setting is normally selected for a TIM located in a node station; in other
words, in a station to which other stations are connected over a different network.
Messages to be sent from this node station interface to other stations in the network
are forwarded via the TIM with the interface role "GPRS master".
–
GPRS station
In the role of "GPRS station", the Ethernet interface is subordinate to the "GPRS
master". Messages to be sent from this station interface to other stations in the
network are forwarded via the TIM with the interface role "GPRS master".
You can still enable the MSC protocol. This makes simple Internet communication with
GPRS via DSL/Internet or via a GPRS network possible. On the TIM 4R-IE, this function
is supported only by Ethernet interface 1.
With the "MSC master", "MSC node station" or "MSC station" options, you specify the
direction of the data transmission in SINAUT networks.
–
MSC master (only TIM 4R-IE)
You use this option for the interface of a TIM 4R-IE in the master or for the interface of
a node station connected to a lower level network with stations.
–
MSC node station
You use this option for the interface of an Ethernet TIM in a node station connected to
the master via a higher level network.