Dns Settings - Mitsubishi Electric MELSEC iQ-F Series User Manual

DNS settings

When the host name is to be set as a domain name in the e-mail function or the MQTT communication function, specify the IP
address of the DNS server to DNS servers 1 to 4 specified by the system administrator.
[Navigation window]  [Parameter]  [Module Information]  [FX5-ENET]  [Application Setting]  [DNS Settings]
Setting item
DNS server 1 address
DNS server 2 address
DNS server 3 address
DNS server 4 address
• The IP addresses of the DNS servers are set with the module parameters. They can be set from DNS
setting (Un\G4390 to Un\G4397) in the buffer memory as well.
• A DNS server is a server that converts domain names into IP addresses, and the DNS settings are required
to use a domain name to find an SMTP server in the e-mail function or to find an MQTT broker in the MQTT
communication function.
• The DNS settings are used if the e-mail function or the MQTT communication function uses a domain name
to specify a connection destination, and thus, the settings can be omitted if connection destinations are
specified with IP addresses.
• When "To Use or Not to Use DNS Server Settings" is set to "Use", set one or more DNS servers from DNS
servers 1 to 4. If no DNS server is set or if a valid value is not set, the error (C101H) occurs.
• To resolve an IP address from a domain name, search the DNS servers in sequence, starting from DNS
server 1.
• If a valid value is set for DNS server 1 and DNS server 4 each, and no or invalid value is set for DNS server
2 and DNS server 3 each, a search is made in the order of DNS server 1 and DNS server 4. (DNS server 2
and DNS server 3 are not searched.)
Description
Set the IP address of DNS server 1.
Set the IP address of DNS server 2.
Set the IP address of DNS server 3.
Set the IP address of DNS server 4.
Setting range
0.0.0.1 to 223.255.255.254
0.0.0.1 to 223.255.255.254
0.0.0.1 to 223.255.255.254
0.0.0.1 to 223.255.255.254
4 FUNCTION LIST
4.3 Other Functions
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