Contents
MVI69-GEC ♦ CompactLogix or MicroLogix Platform
User Manual
Page 34 of 86
ProSoft Technology, Inc.
February 18, 2014
The parameter will be set to a value of 3 when the connection is being closed. This
operation can be initiated from either the client using the Client control word in the output
image or by the server.
The state member of the object can have one of the following values:
State Value
Definition
-1
Client is waiting for a connection request.
0
The client is waiting to establish the connection with the server.
1
The client has established a connection with the server and can send and
receive data.
1000
The client has initiated a close operation on the connection.
1001
The client is waiting for the close on the connection to complete.
1002
The client is issuing an abort (reset) on the connection. The socket is forced
closed.
3000
The client is issuing the ARP command request and waiting for the response.
3001
The client has received the ARP response and has opened the socket.
This member reports the current state of the client socket state machine in the module. It is
preferred to use the Connected member of the object in the ladder logic instead of this
member for control.
The next two members of the object are set by the ladder logic and correspond to the IP
address of the server connected to the client and the service port in the server used for the
connection.
The last four members of the object are statistics representing the transmit and receive
activity of the client socket.
3.1.5 GECBackplane (Backplane Object)
The GECBackplane object stores all the variables required for the data transfer operation
between the module and the controller. The LastRead data member is used as the
handshaking byte to indicate the arrival of new data from the module. The following table
describes the structure of the object.
Name
Data Type
Description
LastRead
INT
Sequence number of last block read
LastWriteCount
SINT[2]
Last number of bytes written
CurBlock
INT
Sequence number for current block
SourceIndex
INT
Current server or client in read block
RxLen
INT
Length of message received
TxServer
INT
Server number for current transmit
TxCount
INT
Number of bytes processed from last tx
message
