Communication Path Bypass Function - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Communication path bypass function

When a communication error occurs between the application and Ethernet-equipped module supporting the following
redundant system, the path on which the error occurs is bypassed so that communication can continue without changing the
communication path setting.
• Applications operating on OPS
• GX Works3
The communications path bypass function cannot be used for direct connection. Use for connection via a hub.
Setting procedure
The bypass function is always enabled. The parameter setting is not required.
Precautions
If an Ethernet-equipped module detects a disconnection or communication error, it does not release the relevant connection
until the alive check function detects an error.
When a disconnection or communication error occurs continually, if the relevant connection has not been released, an
Ethernet-equipped module bypasses the communication path by using a new connection.
For that reason, if a disconnection or communication error is detected over and over again in a short period of time, available
connections run out and an error occurs in GX Works3.
1 FUNCTIONS
1.17 Redundant System Function
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