How to communicate to a 1734-AENT, 1734-AENTR rack with EEIP Ethernet/IP library.
With the current market supply situation, getting a PLC may be an issue for some,
and for a simple job, you may not need to have a PLC, but using just I/O via Point IO ethernet adapter/coupler 1734-AENT and EEIP ethernet/ip library.
The EEIP library can be downloaded from Sourceforge web site.
There are sample codes as well as a Youtube video (
https://www.youtube.com/watch?v=NLCXnVpDgl4).
But after following their sample and instruction, I could not get my solution running, and keep getting error:
An unhandled exception of type 'Sres.Net.EEIP.CIPException' occurred in EEIP.dll
Connection failure, General Status Code: 1 Additional Status Code: 789 Invalid segment in connection path.
From what I can see, other people ran into the same issue.
Below is my actual working solution and its setup:
I set up the AENT with a static IP address, and a rack size of 4 ( AENT + IB8 + OB8E + IB8).
I set Slot 1 Input bit 3 to be ON, and slot 3 input bit 5 ON.
Imports System
Imports Sres.Net.EEIP
Module Program
Sub Main(args As String())
' The Following Hardware Configuration Is used in this example
' Allen-Bradley 1734-AENT Ethernet/IP Coupler
' Allen-Bradley 1734-IB8 8-Channel Digital Input Module [Input 3 ON]
' Allen-Bradley 1734-OB8E 8-Channel Digital Output Module w Status
' Allen-Bradley 1734-IB8 8-Channel Digital Input Module [Input 5 ON]
' This example also handles a reconnection procedure if the Impicit Messaging has Timed out
' (If the Property "LastReceivedImplicitMessage" Is more than one second ago)
Dim eeipClient As EEIPClient = New EEIPClient()
Try
eeipClient.IPAddress = "192.168.10.11" ' IP address
eeipClient.TCPPort = &HAF12 ' port 44818
eeipClient.RegisterSession()
'From the eds file, the path for the Exclusive Owner Assembly Connection Is:
'"20 04 24 66 2C 64 2C 65" ( Class 4, Config Assy. 102, Output Assy. 100, Input Assy. 101)
eeipClient.ConfigurationAssemblyInstanceID = &H66 '102
' Parameters from Originator -> Target [OUTput from O=>T for 'Consumsed']
eeipClient.O_T_InstanceID = &H64 ' Instance ID of the OUTput Assy. 100
eeipClient.O_T_Length = 1 '#OfOutputModules The Method "Detect_O_T_Length" detect the Length using an UCMM Message
eeipClient.O_T_RealTimeFormat = Sres.Net.EEIP.RealTimeFormat.Header32Bit ' Header Format
eeipClient.O_T_OwnerRedundant = False
eeipClient.O_T_Priority = Sres.Net.EEIP.Priority.Scheduled 'implicit msg
eeipClient.O_T_VariableLength = False
eeipClient.O_T_ConnectionType = Sres.Net.EEIP.ConnectionType.Point_to_Point
eeipClient.RequestedPacketRate_O_T = 100000 ' 500ms is the Standard value
' Parameters from Target -> Originator [T Produced to O as Inputs]
eeipClient.T_O_InstanceID = &H65 '' Instance ID of the INput Assy. 101
eeipClient.T_O_Length = 11 ' 8-bytes status header + 2In + 1 OutInstance
eeipClient.T_O_RealTimeFormat = Sres.Net.EEIP.RealTimeFormat.Modeless
eeipClient.T_O_OwnerRedundant = False
eeipClient.T_O_Priority = Sres.Net.EEIP.Priority.Scheduled
eeipClient.T_O_VariableLength = False
eeipClient.T_O_ConnectionType = Sres.Net.EEIP.ConnectionType.Multicast
eeipClient.RequestedPacketRate_T_O = 100000 ' RPI in 500ms is the Standard value
' Forward open initiates the Implicit Messaging
eeipClient.ForwardOpen()
While Console.ReadKey().Key <> ConsoleKey.Enter
Dim ReturnedData As Byte() = eeipClient.AssemblyObject.getInstance(&H65)
Console.WriteLine("State of 1st Input byte: " & ReturnedData(8))
Console.WriteLine("State of 2nd Output byte: " & ReturnedData(9))
Console.WriteLine("State of 3rd Input byte: " & ReturnedData(10))
'eeipClient.O_T_IOData(0) = 3 'Write to Slot 2 Output Bit 0 & 1
System.Threading.Thread.Sleep(500)
End While
Catch ex As Exception
Console.WriteLine("Exception:" & ex.ToString)
Finally
' Close & Unregister the Session
eeipClient.ForwardClose()
eeipClient.UnRegisterSession()
End Try
End Sub
End Module
