Mitsubishi Electric MELSEC iQ-F Series User Manual page 58

Certificate
The certificate used for TLS connection is set with Certificate Configuration Tool for FX5-ENET and written to the Ethernet
module.
Page 85 Certificate Configuration Tool for FX5-ENET
The following lists the certificate specifications not related to Certificate Configuration Tool for FX5-ENET.
■Checking certificate expiration
The expiration dates of client certificates are checked periodically.
• When the Ethernet module is started up, and every 24 hours after that, the Ethernet module checks the expiration dates of
client certificates.
• When the certificate is set to expire within 90 days or has already expired, it is notified through an error/event and the buffer
memory. When an event notifying that the certificate will expire within or less than 90 days occurs, renew the certificate by
the expiration date without fail.
■Precautions
• Encrypted communication cannot be performed by using an expired client certificate. Renew client certificates before they
expire.
• The Ethernet module checks expiration if a client certificate exists, regardless of whether encrypted communication is
performed.
• The expiration check is performed every 24 hours. Therefore, there may be cases where a certificate expiration error does
not occur immediately even if a certificate has expired. To avoid the above problem, renew certificates before their
expiration dates.
4 FUNCTION LIST
56
4.3 Other Functions