# Message Handshake connection

Assign a tag or an expression to this connection.

When a message is written to the Message connection, the Message Notification is set to 1.

- If the Message Handshake connection is not assigned, the Hold Time starts timing. When the Hold Time finishes timing, the Message Notification connection is reset to 0.
- If the Message Handshake connection is assigned, the Message Notification connection is reset to 0 when the Message Handshake connection changes to a new non-zero value.

## See also

Message connection

Message Notification connection