User manual

IEC61131 User and Reference Manual
April 22, 2008
95
remote PC. If the SCADAServer installation is located on a separate machine, check this
option and enter the host name or IP address of the remote PC into the “IP Address / Name”
edit box. If the SCADAServer installation is located on the same PC as the client application
leave this box unchecked. The default state for this check box is unchecked.
The IP Address / Name entry specifies the Ethernet IP address in dotted quad notation, or a
DNS host name that can be resolved to an IP address, of the PC where the ClearSCADA
server is installed. The following IP addresses are not supported and will be rejected:
 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.
 Click Restore Defaults to restore default values to all fields on this page.
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 43: SCADAServer Configuration (Advanced) Dialog Box
The Message Size grouping 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.