Communication Protocols
Modbus TCP
Establishing a connection via TCP/IP to the device is only possible if your
device is equipped with an Ethernet Interface (RJ45).
Contact your IT administrator in order to establish the network connection.
Part 1: Setting the TCP/IP Parameters
Call up
»Device parameter/TCP/IP« at the HMI (panel) and set the following parameters:
TCP/IP address
Subnetmask
Gateway
Part 2: Configuration of the Devices
Call up
»Device parameter/Modbus« and set the following communication parameters:
Setting a Unit Identifier is only necessary if a TCP network should be coupled to a RTU network.
If a different port than the default port 502 should be used please proceed as follows:
Choose “Private” within the TCP-Port-Configuration.
Set the port-number.
Set the maximum accepted time of “no communication”. If this time has expired – without any comunication,
the device concludes a failure within the master system.
Allow or disallow the blocking of SCADA commands.
Part 3: Hardware Connection
There is a RJ45 interface at the rear side of the device for the hardware connection to the control system.
Establish the connection to the device by means of a proper Ethernet cable.
Direct Commands of the Modbus
®
Parameter
Description
Setting range
Default
Menu path
Res Diagn Cr
All Modbus Diagnosis Counters will be reset.
inactive,
active
inactive
[Operation
/Reset]
171
MRU4
DOK-HB-MRU4-2E
