Precautions - Mitsubishi MELSEC L Series User Manual

9.3

Precautions

(1) When a remote password is set for UDP connections
• Determine a target device before data communication. (The communication target needs to be determined
because, after unlocking of the remote password, communication is available with any other devices.)
• At the end of data communication, always lock the remote password.
(If the lock processing is not performed, the unlock state is held until a timeout occurs. No communication for
10 minutes causes a timeout, and the CPU module automatically performs lock processing.)
To prevent unauthorized access using the remote password setting, it is recommended to set all connection
protocols to TCP/IP and disable direct connection with the parameter.
(2) When a TCP/IP connection is closed before lock processing
The CPU module automatically performs lock processing.
CHAPTER 9 REMOTE PASSWORD
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