PLC-5/40E with 1761-NET-ENI

[Plutonius]

I am trying to connect a PLC-5/40E to Ethernet via a 1761-NET-ENI. After reading several other forums and technical sheets I have connected the PLC-5 to the 1761-NET-ENI with a 1761-CBL-PM02 and a 9 pin to 25 pin straight thru adapter (pins 2 and 3 flip flop). This arrangement unforunately yields no communication between the ethernet bridge and the processor.

Before any connection was made I connected to the PLC via DH+ and changed the port settings on the PLC5 channel 0 to 19.2K and switched error checking to CRC. The processor connects perfectly to my PC via a CP3 cable (SLC500 crossover RS232 cable) and the same 9 pin to 25 pin adapter so I know the serial port is working.

Anyone else run into this issue? I don`t know if its a cabling problem or something is wrong with the 1761-NET-ENI.

 

[geniusintraining]

Why are you using a ENI? the 5/40e is Ethernet so can you just connect to the Ethernet port on the PLC?

 

[Plutonius]

My apologizes, it is a 5/40B.

 

[geniusintraining]

No Problem... but are you sure? could it be series B but a L ? see link below

http://www.ab.com/en/epub/catalogs/12762/2181376/2416247/1239760/1551229/PLC-5-Processors.html

I think you have a RIO/DH+ so I dont think you can use a ENI with that CPU... but this is just a WAG

 

[Plutonius]

I certainly have a channel 0 RS232 port. I connected via RSlinx with a Cp3 cable and the DF1 driver.

 

[geniusintraining]

I certainly have a channel 0 RS232 port. I connected via RSlinx with a Cp3 cable and the DF1 driver.

Then you are correct and it should work, PLC5's are listed in the manual see below

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1761-um006_-en-p.pdf

As to your original issue.... not sure because most of the time its a setting on the PLC5 and it sounds like they are set correct, can you ping your ENI ?

 

[Plutonius]

Yes, the ethernet works perfectly fine. However, there is no serial traffic and the 1761-NET-ENI only appears as such on RSlinx. I am thinking it is either a serial setting issue on the PLC5 or a cable issue.

 

[Plutonius]

Also,

Serial Settings on PLC-5
Baud Rate: 19.2K
Parity: None
Stop Bits: 1
Bits: 8
CRC
No Handshaking

 

[Mickey]

This thread may help.

http://www.plctalk.net/qanda/showthread.php?t=64131&highlight=1761-NET-ENI+PLC5

How do you have RSLinx setup? Can you post a snap shot.

 

[geniusintraining]

a cable issue.

Have you tried both with the PM02 cable? 2-2 3-3 and 2-3 3-2 ? I know you tried one way if yes then I dont think its a cable issue, the cable listed in the manual is a PM02, other then that the cable should be fine

 

[Plutonius]

Yes, I have tried both. Albeit my null modem 9 pin to 25 pin is homemade. 2-2, 3-3, 5-7

Below are the Rslinx RS232 settings that worked.

 

[geniusintraining]

Sorry I just dont know enough about the ENI's, to me it all looks good

 

[Plutonius]

Just to let everyone know that I did get it to work. Seems as though the PLC-5 in general decides to connect only when it wants to. What I did was update the 1761-NET-ENI EDS file for RSlinx. I also restarted the ENI multiple times and finally my PLC-5 was shown in RSlinx.

The cables that work is a standard 1761-CBL-PM02 and a straight through DB9 to DB25 cable.

P.S. It connects and goes online via RS Logix 5 perfectly.

 

[geniusintraining]

Glad you got it, thanks for the update! :site:

 

[Plutonius]

Honestly I believe it was working fine to begin with, it really all boiled down to getting the right EDS for RSLinx.