SET_DNS  dmindex
Purpose To set the DNS address of this PLC's built-in Ethernet port using the parameters stored in DM[dmindex] to DM[dmindex+3].
Examples DM[100] = 192
DM[101] = 168
DM[102] = 1
DM[103] = 101

SET_DNS 100   ' set the DNS address to 192.168.1.101

SETSYSTEM 252,0 ' required for Nano-10 and FMD PLCs

RESTART ' power cycle the PLC

 
Comments:
  • To change the DNS address of a PLC's ethernet port, you can load the new DNS address and port number into the variables DM[100] to DM[103]  (e.g. from a HMI panel) and then invoke a function that runs SET_DNS 100 to write the new DNS address into the PLC.
  • For Nano-10 and FMD PLCs,  you should backup the new DNS in FLASH (using the SETSYSTEM 252,0 command) and restart (cold boot) the PLC after changing the DNS address so that the new DNS address will be saved into the virtual EEPROM . This is not required for Fx PLCs.
  • The PLC will only assume the new DNS address after it has been rebooted (via the RESTART command or power-on reset).
    • This is applicable to all models.
  • This command is ignored by i-TRiLOGI  simulator.
See Also GET_DNS, SET_IPAddr, SET_GATEWAY, SET_SMTP, SET_SUBNET

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