Are you talking about a remote output queue or a LAN attached printer?
For a LAN attached printer:
1) WRKWTR and do a #4 to End the writer
2) WRKCFGSTS *DEV *PRT and use #2 to vary off the device, then #8 to Work with description
then #2 to change, then page/roll and change the IP
3) Vary the device on
4) wrkwtr and start the print writer