ProSoft Technology MVI69-GEC User Manual page 34

Contents
User Manual
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
-1
0
1
1000
1001
1002
3000
3001
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
LastRead
LastWriteCount
CurBlock
SourceIndex
RxLen
TxServer
TxCount
Page 34 of 86
Definition
Client is waiting for a connection request.
The client is waiting to establish the connection with the server.
The client has established a connection with the server and can send and
receive data.
The client has initiated a close operation on the connection.
The client is waiting for the close on the connection to complete.
The client is issuing an abort (reset) on the connection. The socket is forced
closed.
The client is issuing the ARP command request and waiting for the response.
The client has received the ARP response and has opened the socket.
Data Type
INT
SINT[2]
INT
INT
INT
INT
INT
MVI69-GEC ♦ CompactLogix or MicroLogix Platform
Description
Sequence number of last block read
Last number of bytes written
Sequence number for current block
Current server or client in read block
Length of message received
Server number for current transmit
Number of bytes processed from last tx
message
ProSoft Technology, Inc.
February 18, 2014