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14.3.2 Setting method
This section describes the setting method of IP filter.
(1) Setting procedure
The IP filter settings become enabled after the reinitialization process.
The following is a procedure for IP filter settings.
1. Confirm the normal completion of the initial process. (Initial normal completion signal (X19): ON)
2. Terminate all data communications with the connected devices and perform a close process on all
connections.
3. Write the settings in the buffer memory areas, IP filter settings (address: 5700
H
to 5721
H
).
4. Perform reinitialization process. ( Page 315, Appendix 4.2)
5. Confirm the normal completion of the reinitialization process with the following buffer memory
areas.
• Reinitialization specification (address: 1F
H
(b15)): 0
H
• Initial error code (address: 69
H
): 0
H
• When a connected device accesses the E71 before the completion of reinitialization process, the access cannot
be denied because the IP filter is not yet enabled.
• The values stored in IP filter monitoring area (address: 5722
H
to 5725
H
) are cleared when the reinitialization
process completes.
• Even if the connection is established as set with the open setting of E71 or the program, access from the
connected device is either allowed or denied following IP address settings. Therefore, if the IP address set in the
open setting of E71 is set to be denied with the IP filter settings, the IP filter function is enabled and
communication with the connected device is denied.
• When the UINI instruction is executed with the IP filter settings written in the buffer memory (address: 5700
H
to
5721
H
), IP filter settings are applied as in the case of reinitialization process by the buffer memory. When using
the UINI instruction, check the setting values in IP filter settings (address: 5700
H
to 5721
H
) before executing the
instruction.
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