Use the fields within the Connection section of the eDNA tab to specify the properties of a network connection to a Wonderware eDNA Historian server.
UnivServ TCP/IP Address—Enter the TCP/IP address of the Wonderware eDNA Historian server to which you want to connect. This is the primary connection. You can enter an alternative (secondary) connection (see below). Use the browse button to display a Reference browse window and select the required server from the window.
UnivServ Port—Enter the number of the TCP/IP port on the Wonderware eDNA Historian server that the network connection will use. The default port number is 4300.
Alternative UnivServ TCP/IP Address—Enter an alternative TCP/IP address for the Wonderware eDNA Historian server to which you want to connect. This is the secondary connection. Leave this field blank if you do not want to specify an alternative address.
Alternative UnivServ Port—Enter the number of an alternative TCP/IP port on the Wonderware eDNA Historian server that the network connection will use. Set the value to 0 if you do not want to set an alternative port.
Acknowledge Data Packet—Tick this box if you want the Wonderware eDNA Historian server to either acknowledge or not acknowledge (ACK/NAK) the receipt of data packets. If the server does not acknowledge a data packet, this indicates the packet is missing. Clear this box if you do not want to enable the ACK/NAK option.
Maximum Cache Size—Specify a maximum size (in kilobytes) for the Wonderware eDNA Historian cache file.
Cache File Name—Enter a prefix for the Wonderware eDNA Historian cache filename.
Maximum Send Buffer Size—Specify a maximum size for the Send Buffer. The buffer is a block of memory that eDNALinkMx sets aside to store data temporarily before sending it to the Wonderware eDNA Historian or to the cache. The need for a buffer arises if data arrives too quickly at the point from which it will be sent, compared to the speed at which it can actually be sent. Specify the size of the buffer (in bytes), or accept the default. The default size is 8192 bytes.
Heartbeat Interval—A heartbeat is a periodic message that ClearSCADA sends to the Wonderware eDNA Historian server. If ClearSCADA receives no response to the message from the Historian server, it will flag the connection as failed. This may be due to a connectivity anomaly or a server anomaly. Specify the interval (in seconds) that you want to set between each heartbeat message sent by ClearSCADA.