Schneider Electric TSXETG100 Manuale Utente Scaricare il pdf (Pagina 41)

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Behavior when a Connection is Broken

Presentation A broken connection can take one of two forms:

l Disconnection of the network cable (cable unplugged, broken, etc.)

l Disappearance of the remote device (device failure, power outage, etc.)

The loss of connection is detected after 2 hours by the Keep Alive request.

If the connection is reestablished during this time, the restoration of communications

depends on the way in which the connection was broken.

Cable

Reconnection

In this case the connection was broken due to a network cable, but the two stations

are still operational.

When the cable is reconnected, communication between the TSX ETG 1000

module and the remote device is resumed on the open TCP/IP connection.

Remote Device

as Server

The remote device that disappeared was acting as server.

1 The client TSX ETG 1000 module continues to send data on the old connection (that

remains partly open).

2 The server receiving data with no associated connection sends a Reset command and

closes the old connection.

3 The client TSX ETG 1000 module opens a new connection.

Remote Device

as Client

The remote device that disappeared was acting as client.

1 The client opens a new connection.

2 The server TSX ETG 1000 module receives the request to open a new connection.

3 The server TSX ETG 1000 module closes the old connection (if there is no activity in

progress) and authorizes the new connection.

Remote device

Server

Client

TSX ETG

Remote device

Client

Server

TSX ETG 1000

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Schneider Electric TSXETG100 Manuale Utente Pagina 41