User manual

IEC61131 User and Reference Manual
April 22, 2008
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The Connect Time parameter specifies the amount of time in seconds the modem will wait
for a connection. Valid values are 6 to 300. The default value is 60.
The Pause Time parameter specifies the time in seconds between dialing attempts. Valid
values are 6 to 600. The default value is 30.
Check the Inactivity Timeout check box to automatically terminate the dialup connection
after a period of inactivity. The Inactivity Time edit box is enabled only if this option is
checked. The default state is checked.
Enter the inactivity period, in minutes, in the Inactivity Timeout box. The dialup connection
will be terminated automatically after the specified number of minutes of inactivity has
lapsed. This option is only active if the Inactivity Timeout box is checked. Valid values are
from 1 to 30 minutes. The default value is 1.
 Click Restore Defaults to restore default values to all fields on this page, except for the
Phone Number field. The content 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.