
EK280
Application Manual
125
Addressing mode
The Modbus addresses parameterized in the device are assigned according to logical addressing.
Depending on the retrieval software used, it may be necessary to change the addressing in the protocol to
physical addressing.
0
=
Logical addressing of the Modbus registers with addresses starting with 1.
1
=
Physical addressing of the Modbus registers with addresses starting with 0.
Querying the registers according to the addressing mode must take this into account as follows:
Value as per table below
Addressing mode
MBAMd
Queried value
(Register)
301
"0" (logic
Offset of "-1")
"300"
"1" (physical)
"301"
Table 3: Modbus Addressing mode
The following connection parameters for
“
connection 1
”
are set by default via parameter file (see paragraph
b) of this chapter):
Short
Descrip.
Description
Address
Value
Content
CW5.S
Call acceptance window start
14:150
00:00 Start call acceptance window
CW5.E
Call acceptance window end
14:158
11:59
PM
End call acceptance window
Event
Connection event
5:D70
2F05 Call window 5 created
EvTyp
Connection event type
5:D75
1
0: Time
1: Period
Iface
Connection interface
5:D72
2
Terminal i.
SuplT
Connection power supply type
5:D76
2
0: all
1: Battery
2: ext. supply
TypPr
Connection protocol type
5:D77
0
0: Server (Protocol
recognition)
4: Modbus (fix)
Table 4: Default connection parameters
8.1.6
Modbus via internal modem (Modbus RTU_TCP)
In the EK280 communication via the internal GPRS modem in RTU_TCP mode can be via Modbus amongst
others. Values can be read and updated and archives can be retrieved.
Modbus communication is available for both battery and external power supply operation. For both operation
types it is necessary for at least one call acceptance window to be open.
8.1.6.1 Connection
The internal GSM and GPRS modem is described in chapter 7.1
. GSM and GPRS operation with TCP-IP is
also described here.
8.1.6.2 Parametrization of the EK280
a) Send the following parameter file to the EK280 (see Chapter 3.6, page 17):
EK280_xvx. - int. ECM-GW-120 - Modbus-TCP (*)
23
23
The "x" stands for the version of software on the device, e.g. "2v2".
The star * stands for a small letter which indicates the version of the file, e.g. "a".