Modbus Via Rs232 Interface - Honeywell Elster EK280 Applications Manual

EK280

6.6.5 Modbus via RS232 interface

In the EK280 communication via the terminal interface in RS232 operation can be via Modbus amongst
others. Values can be read and updated and archives can be retrieved.
6.6.5.1 Connection
RS232 interface connection is described in chapters 6.4.1.1 and 6.4.1.2
6.6.5.2 EK280 Parameterization
a) Parameterization for RS232 interface operation is described in chapter 6.4.1.3.
b) Sending parameter file for Modbus parameterization
Send the parameter file
EK280. (see chapter 3.6
c) For customized settings, the Modbus parameters (see paragraph "d)") can be set on the device under
the path "Admin" > "Interfaces" > "Terminal interface" >
All parameters listed on the EK280 "Admin." tab can be found in enSuite under "Parameter"
i
under the same path. To do this select "Navigation" on the left-hand side and then
online" at the bottom of the navigation window.
d) The following Modbus parameters are set by default via parameter file (see chapter 6.6.5.2, paragraph
"b)"):
Short Desc. Description
MBTrM Transfer mode
MBDir Data direction
Device address
MBAdr
(Modbus Slave ID)
MBRSz Register size
MBAMd Addressing mode
Table 2: Default Modbus parameter
15
The * asterisk represents the lower-case letter, used to identify the file version, i.e. "a"
Application Manual
"EK280_2v1.. - RS232 & Verb.5 & ext. Vers.
"Send parameter file", page 10)
Address Value Contents
0: ASCII - The content of each register is transmitted
as four ASCII-encoded hexadecimal digits
1: ASCII - The content of each register is transmitted
2:7B1 1
as two bytes
2: RTU_TCP - Transmission as for RTU mode with
additional information for Modbus TCP protocol
0: H-Wort first
located in the first register
2:7B0 1
1: L-Wort erst
in the first register
Value range from1...247 (0 = "Broadcast")
2:7B2 1*
2: Register size 2Byte
2:7B8 2
4: Register size 4Byte
0: Log. Mode
2:7B9 0
1: Phys. Mode
*
(Modbus-RTU)_*.WPP"
"Modbus".
The most significant word is
The least significant word is located
User-determined value.
65
15
to the
"Parameterize