
EK280
Application Manual
134
Table 14: preprogrammed connection parameters for link 7 (RTU_TCP)
The parameters of a link which produce the actual reference to the Modbus are the "Connection_ProtocolType"
(states that the Modbus "shall be communicated with") and "Connection_ProtocolInfo" (contains the index
regarding the Modbus master information which is relevant for this link).
Access-Point-Parameter
Display
Designation
Address
Value
Content
APN
Access Point Name
3:780
elstermz.ic.t-mobile IP address of the access server
UName
Access Point UserName
3:781
User name (with necessary
authentication)
PwAPN
Access Point
UserPassword
3:782
gprsxy
Password (with necessary
authentication)
IPAdr
OwnIpAddress
3:783
Own IP address, this value is not
parameterized
Port
OwnTcpIpPort
3:784
40000
Own port, via which a distant
client can create a TCP/IP
connection. This port must also be
known to the retrieving (client)
system!
DNS12
Dynamic Name Server 1
3:794
10.1.2.201
Optional indication
DNS22
Dynamic Name Server 2
3:795
10.1.2.202
Optional indication
Table 15: Access-Point-Parameter
i
Evidently, the correct APN data must be parameterized in order to establish a TCP connection.
The values entered above serve as dummy data, which must be overwritten with the correct
data.
Telephone book parameters
Display
Designation
Address
"x”
29
Value
Content
Name
Telephonbook_Name
x:D20
MdBusMast
er TCP_x
Serv.
Telephonbook_Sever
x:D27
10.1.13.251 IP address of the server to be
dialed
Port
Telephonbook_ServerPort
x:D28
37357
Login
Telephonbook_ServerUserNam
e
x:D29
unknown
User name (with necessary
authentication on the server)
Passw
Telephonbook_ServerPassword
x:D2A
unknown
Password (with necessary
authentication on the server)
Table 16: Telephone book parameters
i
Dummy telephone book data is entered in the above table. Such data must naturally be
overwritten with the correct parameters to enable communication to take place.
The same Modbus master task list is parameterized for operations via an internal modem as for operations via
the terminal device (see Chapter 8.2.6).
The parameterized trigger event must take place for communication to start. For testing communication, the
device on link 7 with parameter 7:D71 can be set with the brief description "TestC" to 1. The connection is then
started as a test. Otherwise there will be a wait until the parameterized trigger event takes place.
29
"x" = Instance of the telephone book (value range from 1-10)