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Old May 13th, 2013, 09:27 AM   #1
wa5yom
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Confused 1756 ENBT

I have 6 machines all configured and programmed the same....only difference is the IP....
In the RsLinx Driver Diagnostics it shows to be a CSPv4 connection instead of a Ethernet/IP connection...

Any thoughts?

Tim
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Old May 13th, 2013, 09:36 AM   #2
Ken Roach
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The 1756-ENBT doesn't support the CSPv4 protocol, at all. So either the target device isn't a ControlLogix, or the indication in RSLinx Classic is incorrect.

Exactly where are you seeing this in RSLinx Classic ?

Are there other functional problems other than this indication ?
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Old May 13th, 2013, 10:08 AM   #3
wa5yom
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It is not indicated properly and the Driver Diagnostics shows a CSPv4 connection...and I cannot go on line........but the communications (msg) is working correctly....my initial though was that some other device was online with that IP....but I disconnected the machine from the network. pinged it. and nothing else showed up....

Connection Log' the The IP group is 10-24-9-249 through 254 and the node in question is 251

05/13/13 08:36:39 10.24.9.249 Attempting first connection, protocol = CSPv4
05/13/13 08:36:40 10.24.9.250 Attempting first connection, protocol = CSPv4
05/13/13 08:36:40 10.24.9.251 Attempting first connection, protocol = CSPv4
05/13/13 08:36:40 10.24.9.252 Attempting first connection, protocol = CSPv4
05/13/13 08:36:40 10.24.9.253 Attempting first connection, protocol = CSPv4
05/13/13 08:36:40 10.24.9.254 Attempting first connection, protocol = CSPv4
05/13/13 08:37:01 10.24.9.251 Device has accepted the CSPv4 connection
05/13/13 08:37:01 10.24.9.251 Can't set port type to 28: no Harmony object for this Ethernet
05/13/13 08:37:02 10.24.9.254 Unable to establish TCP connection to the Ethernet Interface
05/13/13 08:37:02 10.24.9.254 [10061] Connection refused
05/13/13 08:37:02 10.24.9.254 Device refused a CSPv4 connection, retry using EtherNet/IP
05/13/13 08:37:02 10.24.9.254 Attempting first connection, protocol = EtherNet/IP
05/13/13 08:37:02 10.24.9.249 Unable to establish TCP connection to the Ethernet Interface
05/13/13 08:37:02 10.24.9.249 [10061] Connection refused
05/13/13 08:37:02 10.24.9.249 Device refused a CSPv4 connection, retry using EtherNet/IP
05/13/13 08:37:02 10.24.9.249 Attempting first connection, protocol = EtherNet/IP
05/13/13 08:37:02 10.24.9.252 Unable to establish TCP connection to the Ethernet Interface
05/13/13 08:37:02 10.24.9.252 [10061] Connection refused
05/13/13 08:37:02 10.24.9.252 Device refused a CSPv4 connection, retry using EtherNet/IP
05/13/13 08:37:02 10.24.9.252 Attempting first connection, protocol = EtherNet/IP
05/13/13 08:37:02 10.24.9.250 Unable to establish TCP connection to the Ethernet Interface
05/13/13 08:37:02 10.24.9.250 [10061] Connection refused
05/13/13 08:37:02 10.24.9.250 Device refused a CSPv4 connection, retry using EtherNet/IP
05/13/13 08:37:02 10.24.9.250 Attempting first connection, protocol = EtherNet/IP
05/13/13 08:37:02 10.24.9.253 Unable to establish TCP connection to the Ethernet Interface
05/13/13 08:37:02 10.24.9.253 [10061] Connection refused
05/13/13 08:37:02 10.24.9.253 Device refused a CSPv4 connection, retry using EtherNet/IP
05/13/13 08:37:02 10.24.9.253 Attempting first connection, protocol = EtherNet/IP
05/13/13 08:37:22 10.24.9.254 Device has accepted the EtherNet/IP connection
05/13/13 08:37:22 10.24.9.254 Can't set port type to 288: no Harmony object for this Ethernet
05/13/13 08:37:22 10.24.9.252 Device has accepted the EtherNet/IP connection
05/13/13 08:37:22 10.24.9.252 Can't set port type to 288: no Harmony object for this Ethernet
05/13/13 08:37:22 10.24.9.250 Device has accepted the EtherNet/IP connection
05/13/13 08:37:22 10.24.9.250 Can't set port type to 288: no Harmony object for this Ethernet
05/13/13 08:37:22 10.24.9.249 Device has accepted the EtherNet/IP connection
05/13/13 08:37:22 10.24.9.249 Can't set port type to 288: no Harmony object for this Ethernet
05/13/13 08:37:22 10.24.9.253 Device has accepted the EtherNet/IP connection
05/13/13 08:37:22 10.24.9.253 Can't set port type to 288: no Harmony object for this Ethernet
Attached Images
File Type: gif connection.gif (5.0 KB, 120 views)

Last edited by wa5yom; May 13th, 2013 at 10:20 AM. Reason: Added connection log
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Old May 13th, 2013, 10:23 AM   #4
Ken Roach
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Okay, so the essential problem is that you can't go online with that controller.

Are you using the RSLinx Classic 'Ethernet Devices' driver, or the 'EtherNet/IP
driver ?

Can the RSWho browse see the 1756-ENBT ?

Can you bring up the diagnostic web page of the 1756-ENBT ?

It's possible that the driver configuration got confused during establishment of the device type, and thinks that your Logix controller is really an SLC or PLC-5. I've never seen that happen, but that's the stage at which the Ethernet Devices driver determines whether to use CSPv4 or EIP.

Try creating a new driver, either 'Ethernet Devices' or 'EtherNet/IP', and let it browse.
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Old May 13th, 2013, 10:26 AM   #5
Ken Roach
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Okay, which one am I supposed to be looking at ?

With those Harmony object errors, I would go ahead and delete the Harmony.HRC and Harmony.RSH files in the /RSCommon director and reboot.
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Old May 13th, 2013, 10:31 AM   #6
wa5yom
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I have re-created the Ethernet Driver a few times.....with no change in the results......I am using the Ethernet Device Driver

The device in Question is the 10.24.9.251...
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Old May 13th, 2013, 10:43 AM   #7
Ken Roach
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Does your computer also have that address ?

A 1756-ENBT cannot accept a CSPv4 connection: they don't support that protocol, which uses TCP Port 2222.

But we see 10.24.9.251 accepting the CSPv4 connection, and also identifying itself as a Computer (really, an RSLinx station).

Try PINGing 10.24.9.251, then doing an 'arp -A' from the command line to see if you can determine the MAC ID of the device.

All 1756-ENBTs will have a MAC ID beginning with 00-00-bc.
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Old May 13th, 2013, 10:48 AM   #8
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The Mac ID is
00-00-bc-d0-b9-e6
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Old May 13th, 2013, 10:49 AM   #9
wa5yom
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I can access its web page......
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Old May 13th, 2013, 11:02 AM   #10
Contr_Conn
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Change IP address in RSlinx driver to 10.24.9.251:EIP
This will force to conenct with CIp a bypassing initail CSP connection
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Old May 13th, 2013, 11:05 AM   #11
wa5yom
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With thst change it displays the device as a RSLinx server...
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Old May 13th, 2013, 11:09 AM   #12
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Contr_Conn is of course correct, but I'm not sure what making that change will do.

Something's wrong if that IP address is accepting a CSPv4 connection. It should refuse a TCP connection directed to Port 2222.

I suspect very strongly that there is a computer on this network with the same IP address as the controller.

It might be time to roll out the big guns: Wireshark.
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Old May 13th, 2013, 11:14 AM   #13
wa5yom
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Well...the Mac ID showed it to be a ENBT.....I dfisconnected it from the network before and pinged the address...but I can always try it again...
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Old May 13th, 2013, 11:21 AM   #14
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That actually suggests *more* that it's a computer.

A 1756-ENBT always replies to a PING, but some computer operating systems block PING. Any chance somebody is running a VMWare instance of XP with that IP address ?

There's a great command-line utility called 'TCPing'.

http://www.elifulkerson.com/projects/tcping.php

Try doing a TCPing with Port 2222 and see what device answers.
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Old May 13th, 2013, 11:32 AM   #15
wa5yom
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Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\>tcping 10.24.9.251 port 2222
1 extra argument ignored. FYI.
Probing 10.24.9.251:0/tcp - Socket is not connected (10057) - time=2002.232ms
Probing 10.24.9.251:0/tcp - Socket is not connected (10057) - time=2001.668ms
Probing 10.24.9.251:0/tcp - Socket is not connected (10057) - time=2000.102ms
Probing 10.24.9.251:0/tcp - Socket is not connected (10057) - time=2000.039ms
Ping statistics for 10.24.9.251:0
4 probes sent.
0 successful, 4 failed.
Was unable to connect, cannot provide trip statistics.
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