Advanced
[ Advanced > Industrial Protocols > Modbus TCP ]
326
RM GUI GRS
Release
8.0
09/2019
7.3.2
Modbus TCP
[ Advanced > Industrial Protocols > Modbus TCP ]
Modbus TCP
is a protocol used for Supervisory Control and Data Acquisition (SCADA) system
integration.
Modbus TCP
is a vendor-neutral protocol used to monitor and control industrial
automation equipment such as Programmable Logic Controllers (PLC), sensors and meters.
This dialog lets you specify the parameters of the protocol. To monitor and control the parameters
of the device, you need Human-Machine Interface (HMI) software and the memory mapping table.
Refer to the tables located in the Industrial Protocol user manual for the supported objects and
memory mapping.
The dialog lets you enable the function, activate the write access, control which TCP port the
Human-Machine Interface (HMI) polls for data. You can also specify the number of sessions
allowed to be open at the same time.
Note:
Activating the
Modbus TCP
write-access can cause an unavoidable security risk, because the
protocol does not authenticate user access.
To help minimize the unavoidable security risks, specify the IP address range located in the
Device
Security > Management Access
dialog. Enter only the IP addresses assigned to your devices before
enabling the function. Furthermore, the default setting for monitoring function activation in the
Diagnostics > Status Configuration > Security Status
dialog,
Global
tab, is active.
Operation
Operation
Enables/disables the
Modbus TCP
server in the device.
Possible values:
On
The
Modbus TCP
server is enabled.
Off
(default setting)
The
Modbus TCP
server is disabled.
Configuration
Write access
Activates/deactivates the write access to the
Modbus TCP
parameters.
Note:
Activating the
Modbus TCP
write-access can cause an unavoidable security risk, because the
protocol does not authenticate user access.
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