User manual
IEC61131 User and Reference Manual 
April 22, 2008     
34 
The Hold Time parameter specifies the time, in milliseconds, that the driver will hold RTS 
after the last character is transmitted. This is useful for devices that immediately end 
transmission when RTS is turned off. The value of this field must be smaller than the Time 
Out value set in the General parameters dialog. For example, if the Timeout value is set to 3 
seconds, the CTS Delay Time can be set to 2999 milliseconds or less. The minimum value 
for this field is 0 milliseconds. The value is initially set to 0 by default. 
  Click Restore Defaults to restore default values to all fields on this page. 
Dial Up Parameters 
Dial Up parameters are used to configure a dial up connection. When Dial Up is selected for 
Connection Type the Dial Up tab is added to the DNP Configuration dialog. When the Dial 
Up tab heading is clicked the Dial Up dialog is opened as shown below. 
Figure 7: DNP Configuration (Dial Up) Dialog Box 
The Dialing Prefix parameter specifies the commands sent to the modem before dialing. A 
maximum of 32 characters can be entered. All characters are valid. The default value is 
“&F0 &K0 S0=1 &W0 &Y0”. 
The Phone Number parameter specifies the telephone number of the remote controller. A 
maximum of 32 characters can be entered. All characters are valid. This field‟s default value 
is blank. 
The Dial Type parameter specifies the dialing type. Valid values are Pulse and Tone. The 
default value is Tone. 










