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Commissioning
6.3 Parameterizing the device
62
Equipment Manual, 09/2022, L1V30415168B-03
"Hardware write-protection" parameter
The hardware write protection prevents write access to the device.
In order to gain write access, the hardware write protection must be deactivated directly on
the device.
Selection
Range
Factory
setting
Hardware write
protection
•
OFF:
Hardware write protection is deactivated.
OFF
•
ON:
Hardware write protection is activated.
Activation or deactivation of the hardware write protection must be confirmed on the device.
The Power LED on the device flashes for 15 minutes. By pressing the SW button on the device
during this flashing period, the protection function is activated or deactivated.
"Device access control (IP filter)" parameter
The IP filter is a configurable access protection. If activated, Modbus TCP write commands are
only accepted if the remote station is located in the same subnet.
Selection
Range
Factory
setting
Device access control
•
OFF:
Protection is deactivated.
OFF
•
ON:
Protection is activated.
"
TCP/IP settings
"
parameter
Ports are communication channels which make it possible to access a Modbus-capable device
via a network.
Standard IP ports like port 502 are often tested by port scanners. If an open port is discovered
by an attacker, the device can be attacked via this port. The PAC3200T allows the Modbus
TCP ports to be configured manually. Switching from standard port 502 to a user-defined port
makes it more difficult to scan for open ports. The Modbus TCP communication port 502 is
used as the default setting.
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