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Alive check for built-in Ethernet port LCPU
Does the alive check work when no data is sent or received through the built-in Ethernet port of L series CPU after the establishment of TCP connection?
- Category :
Answer
When the protocol is set to TCP, KeepAlive check is performed. (Checking for a response to KeepAlive ACK message) An alive check message is sent five seconds after reception of the last message from the connected device to check if the device returns a response or not. If no response is received, the alive check message will be resent at intervals of five seconds. When no response is received for 45 seconds, the connected device is regarded as non-existent and the connection is disconnected.
- Product Name
- MELSEC-L Series
- Series
- L Series
