Writing a new IP address to SLC5/05

[jreddekopp]

my serial connection isnt working so i want to use ethernet. However, i dont know the IP address so i cant configure the driver.

help?

 

[Ken Roach]

If you don't want to start from scratch by erasing the program and using BOOTP/DHCP, you're going to "sniff out" the IP address.

If you know the subnet that the controller is probably connected to (like 192.168.1.x), use a network scanner like Angry IP Scanner or NMAP to find it.

If you don't know the IP address at all, I think the best thing to do would be to connect to a local Ethernet switch with your computer running Wireshark, then watch for ARP packets when you physically connect the SLC-5/05 Ethernet cable to the same switch.

Information on Wireshark is widely available on the Internet and at Wireshark.org.

If the PLC does have an IP address (i.e. it's not using BOOTP/DHCP mode), you may also be able to use the EtherNet/IP driver to determine the IP address, since it uses a Broadcast packet to find controllers. This also relies upon the SLC-5/05 supporting EtherNet/IP, which has only been for about the past 10 years.

 

[OkiePC]

I think if you reset the SLC to factory defaults that it will also reset the IP address and enable BootP. Then you can use the rockwell BootP utility to set the IP address, then download the program and get it back in run mode...of course you need a good program to download if you do any of this.

More info:
http://www.plctalk.net/qanda/showthread.php?t=42978
http://www.plctalk.net/qanda/showthread.php?t=62916