User manual

IEC61131 User and Reference Manual
April 22, 2008
29
 0.0.0.0 through 0.255.255.255
 127.0.0.0 through 127.255.255.255 (except 127.0.0.1)
 224.0.0.0 through 224.255.255.255
 255.0.0.0 through 255.255.255.255.
The TCP Port Number entry specifies the TCP port on the ClearSCADA server. The valid
range is 0 to 65535. The default value is 49155
 Click Restore Defaults to restore default values to all fields on this page, except for the
IP Address / Name field. The contents of this field will remain unchanged.
Advanced Parameters
Advanced parameters are used to control the message size for the protocol. Control over
message length is needed when writing large amounts of data over certain communication
networks. A larger value can improve communication speed but can increase the number of
failed transmissions. A smaller value can reduce the number of failed transmissions but may
reduce throughput. When the Advanced tab heading is clicked the Advanced dialog is
opened as shown below.
Figure 3: ClearSCADA Configuration (Advanced) Dialog Box
The Maximum selection indicates that the host application is to package messages using
the maximum size allowable by the protocol.
The Custom Value selection specifies a custom value for the message size. This value will
indicate to the host application to package messages to be no larger than what is specified,
if it is possible. Valid values are 2 to 264. The default value is 264.
 Click Restore Defaults to restore default values to all fields on this page.