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EK280
Application Manual
183
Designation
Modbus_Master_
TaskList_ …
Meaning
Address Value Content
...MdbNoReg
Disp.
Register
16:8C6
2
2 registers
...MdbRegRWMode RW-Mode
16:8C7
3
3: Write-FC16
...MdbStartAdr
Modbus-Adr. 17:8C5
317 6:311_1
T.F - Temperature substitute value [°C]
...MdbNoReg
Disp.
Register
17:8C6
2
2 registers
...MdbRegRWMode RW-Mode
17:8C7
3
3: Write-FC16
...MdbStartAdr
Modbus-Adr. 18:8C5
319 14:314
N2 - Nitrogen content [%]
...MdbNoReg
Disp.
Register
18:8C6
2
2 registers
...MdbRegRWMode RW-Mode
18:8C7
3
3: Write-FC16
Table 12: Extract from the preprogrammed tasks in the Modbus task list
The parameterized trigger event must take place for communication to start. For testing communication, the
parameter 8:D71 can be set with the brief designation "TestC" to 1 on the device under link 8. The link is
then started as a test. Otherwise there will be a wait until the parameterized trigger event takes place.
8.2.7 Modbus master via internal modem (RTU_TCP)
p) Parameterization of the functions of the internal modem is described in
a) Send the parameter file for Modbus parameterization
−
Send the following parameter file to the EK280 (
EK280_xvx. - Modbus-Master RTU-TCP int.Modem Connection7 ext. Power supply (*)
q) 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
(
) 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
49
The * asterisk represents the lower-case letter, used to identify the file version, i.e. "a"