• No : 1630
  • Displayed Date : 2023/04/25 19:00
  • Updated DTM : 2023/06/09 14:01
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In the Ethernet module communication setting, when I select 'Unpassive' communication port opens. However, if 'Fullpassive,' unable to open communication port. What is a possible cause?

In the Ethernet module communication setting, when I select 'Unpassive' communication port opens. However, if 'Fullpassive,' unable to open communication port. What is a possible cause?
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Answer

There is a difference between 'Unpassive' and 'Fullpasisve' as follows.
1) Unpassive: Communicates with a device that has any IP or port No.
2) Fullpassive: Communicates only with a device that has the IP and port No. specified by the PLC program.
 
Therefore, in 'Fullpassive' mode, if the IP and port No. of the actual communication device is different from specified by the PLC program, communication cannot be performed.
The actual port No. is determined by adding the set value (Default: 256) of self / communication target port standard No. to the local/remote port No. specified in the function block.
When connecting to other devices, set the port No. considering the set self port standard No. and communication target port standard No.

[Related document]
Refer to '4-2 Definition of Module Operations 11) and 12)' in the user's manual 'Ethernet Interface Module (for both D300win/Standard loader)' (FEH259).