
EK280
Application Manual
133
8.2.7
Modbus master via internal modem (RTU_TCP)
Parameterization of the functions of the internal modem is described in Chapter 7.1.
a) Send the parameter file for Modbus parameterization
Send the following parameter file to the EK280 (see Chapter 3.6 Send parameter file):
EK280_xvx. - Modbus-Master RTU-TCP int.Modem Connection7 ext. Power supply (*)
28
The following Modbus parameters are preset in this file:
Link 7 is set up for Modbus master communications via the integrated modem. The event type is a
point in time. Telephone book instances 1 and 9 (as alternative) are accessed
Reference is made to instance 6 of Modbus master information
"External supply" is set up as a supply type.
The first 24 tasks on the task list are processed.
A task list is parameterized which writes several Modbus addresses from the standard Modbus table
(see Chapter 8.1.1) to the client.
Dummy APN data and dummy telephone book parameters. Such data must naturally be overwritten
with the correct parameters to enable communication to take place.
Display
Designation
Address Value Content
MMDir
Modbus_Master_AdrDirection
6:7C0
0
0: H-Wort erst
MMTrM
Modbus_Master_TransMode
6:7C1
2
2: RTU_TCP
MMAdr
Modbus_Master_SlaveAddress
6:7C2
100
Modbus address of the remote object
MMAdM Modbus_Master_AddressModus
6:7C3
1
1: Phys. mode
MMALx
Modbus_Master_TaskListIndex
6:7C4
1
From index 1 (start) of the task list
MMAAz
Modbus_Master_TaskListNoTas
ks
6:7C5
24
24 tasks
Table 13: Preset parameter for instance 6 of the Modbus master info
Display
Designation
Address Value Content
iface
Connection_Interface
7:D72
3
3: internal modem
TOutV
Connection TimeOut
7:D73
60
60 seconds
Destn
Connection_Mode
7:D74
1
1: Until a connection has been
successfully set up for the first time
EvTyp
Connection_EventType
7:D75
0
0: Time
SupIT
Connection_-
PowerSupplyType
7:D76
3
3: External supply
TypPr
Connection_ProtocolType
7:D77
4
4 Modbus
StCon
Connection_ProtocolStatus
7:D78
0
Delete status at the beginning
IPInf
Connection_ProtocolInfo
7:D79
6
With Modbus: refers to instance 6 of the
Modbus master info (1...8)
IPFak
Connection_Factor
7:D7A
2
Resulting waiting time:
Base time * factor
repeat
–1
in minutes
IPVer
Connection_Number
7:D7B
1
1 attempt
V7SE
Connection_Schloss_Ebene
7:D7D
3
3: Admin
4 Customer
5: Meter reader
6: User 6
Dst1
Connection_-
TelephoneBookInstanceDest
1
7:D80
1
Establish a link to the receiver from
telephone book instance 1
Dst2
Connection_-
TelephoneBookInstanceDest
2
7:D81
9
Alternative target (telephone book
instance 9)
28
The * asterisk represents the lower-case letter, used to identify the file version, i.e. "a"