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  • No : 22745
  • Release Date : 2018/09/03 17:29
  • Update : 2018/09/21 17:52
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TCP retransmission timer setting for built-in Ethernet port LCPU

Where can I set the TCP retransmission timer for the built-in Ethernet port in the L series CPU?
Category : 

Answer

For the built-in Ethernet port in the L series CPU, the TCP retransmission timer setting is fixed and unchangeable.
The retransmission occurs six times. The timeout starts at 0.3 second, and then occurs at 0.6, 1.2, 2.4, 4.8, and 9.6 seconds.
When no ACK response is returned within 19.2 seconds after the last retransmission, the external device is considered as faulty and
the connection is disconnected. It takes 38.1 seconds in total until the external device is considered as faulty and disconnected.
Product Name
MELSEC-L Series
Series
L Series
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