If several clients access the same protocol data, the client connections must still be kept apart. Also the number of each instance used for each client must be noted so that if there are problems with the communication, the line diagnostic data for instances follows the same instance number rule.
In case of sequential event data transaction and a TCP client connection, it is essential that a reconnecting client is given back the same instance to which it was attached before disconnecting. This way, the event reading resumes from the point where the client left off, provided that no event overflow has occurred while the client was absent. If multiple client connections are used, they must be distinguished by using the Client IP and TCP port parameters.