Restrict address ranges for open ports

For open ports, you can enable and disable access to certain address ranges.

If no restrictions are specified (default setting), all addresses can be read and written.

You can specify up to ten restrictions for each port.

You can define word areas (16 bits) only. Bit areas cannot be specified.

  1. Go to “Port” > “Memory area restrictions and mapping” and select the desired port.
  2. Select “Add new”.

    Restrictions are automatically added and deleted when you add or delete a port.

  3. Select a memory area in the “Memory area restrictions and mapping” list.
  4. For “Memory area”, select the memory area of the PLC.

    Available areas: DT, FL (FP2SH only), LD, WR, WL, WY, WX. If “Modbus/TCP gateway” is enabled, you can map the memory area to a Modbus data type.

  5. For “Start address” and “End address”, set the first and last address of the range that can be accessed.
  6. For “Access”, select the type of access which is permitted: “Read”, “Read/write”, or “Block”.

    When “Allow FPWIN Pro” is enabled, you must explicitly block the memory areas you want to protect. When it is disabled, all unspecified memory areas are automatically blocked.

  7. Save your configuration.

    If you have changed any settings, a “Save” button appears in the top right corner of the screen. You can make changes in multiple pages and then save your settings.

    To reset all settings on the current page to the default configuration, select the “Reset” button at the bottom of the page.

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