Honeywell Elster EK280, Applications Manual

Page: 180 / 223

EK280 Application Manual 178
The task list consists of three parameters per instance:
Display Designation Meaning
Address
"x" 45
MBAdr
MMSAd Modbus_Master_AufgList
_
MdbStartAdr
The Modbus address from
which the number of
registers shall be read /
written
x:8C5 All Modbus addresses
are possible here which
can be found in the
standard Modbus table
(

chapter 8.1.1 )
MMAR Modbus_Master_AufgList
_
MdbAnzReg
Number of registers, from
which the Modbus address
shall be read / written
x:8C6
MMRW Modbus_Master_AufgList
_
MdbRegRWMode
RW-Mode x:8C7 0: Read-FC03
1: Read-FC04
2: Write-FC06
3: Write-FC16
Table 7: Parameters of the task list
Push-Mode (Write-FC06 / Write-FC16)
The Modbus addresses configured in the task list are read in the device. In this case the corresponding LIS
rights are used. For this reason the lock level is also transferred in the link. It must be noted in this case that
the lock level cannot be higher than the lock level used for parameterization of the task list.
The writing of data to the remote object can take place by means of two different function codes (FC).
FC06: Write Single Register
FC16: Write Multiple Registers
Pull Mode (Read-FC03 / Read-FC04)
The Modbus addresses configured in the task list are retrieved in the Modbus slave (retrieval system) and
written internally. In this case the LIS rights of the respective data are used. For this reason the lock level is
also transferred in the link. It must be noted in this case that the lock level cannot be higher than the lock
level used for parameterization of the task list.
The retrieval of data to the remote object can take place by means of two different function codes (FC).
FC03: Read Holding Register
FC04: Read Input Register
The data format within which the data in this register is transferred, is parameterized via the Modbus list
(

chapter 8.1.1 ).
45
"x" = Instance of the task (value range from 1-70)