5/05 & rs 232 coms (null modem) problem

[stuman]

I have a new L551 that I want to supply an IP address to, so I follow the instructions in the 'ethernet SLC500 processors, quick start for experienced users' guide, and it does not work. I am using a straight null modem cable, 3 wires: pins 5-5 and pins 2 to 3 are crossed. It says that I need the 1747-CP3 cable, but the question is, will the null modem cable work?

I have done it on comm 1 autoconfig, on 2 different computers XP and Win200, it cannot make a connection. When I turn the CPU on, the fault light flashes on, so does the ethernet ligt and then no lights are on, I take it that is normal?

Is there any other way, apart from boottp, of assigning an IP address? what is the IP address by defualt if I reset it and it cannot find a boottp server? I dont know how to use bootp, hence I am trying to stay away from it.

Any help would be great.

Thanks
Stu

 

[504bloke]

It maybe your cable

CP3 Pinout attached

 

[stuman]

Solved!

I solved it, in another post

http://www.plctalk.net/qanda/showthread.php?t=25054&highlight=1747-CP3

the 5/05 was in the Protect position, I changed the jumper to the Program? position, and it auto configured immediately.

Thanks
stu