PC-Side Modems (Modem Services)

1. 1. Connect the modem to a PC, using the cable supplied by the modem manufacturer.

   2. Open Modem Services from the Connection menu.

   3. Select and enter the modem parameters:

      1. At the top of Modem Services, select a tab; the Modem Type selection box shows the options.

      2. Select the PC modem type; the initialization strings change accordingly.

      3. If required, you can edit other parameters:

         • Initialization commands: click in the field and enter text.

         • Com Port, baud rate, Time Out, and Time-Out Reply: use the drop down boxes

         • PIN code: click to enter the number.

      4. When all parameters are set, click the Initialize PC Modem button; the PC establishes communication with the modem and initializes it.

 

1. Prepare and connect the PLC-side modem as described in the topic PLC-side Modems, in the section Enabling a Controller to Communicate via Modem.

2. Dial the PLC to establish the communication link:

   1. Click the button to the right of the Number to Dial field to open Favorites and select a number,
      Favorites (Telephony)You can keep a list of frequently-used numbers in Favorites.

      1. • Click a line to enter or select a number and description. To access outside lines, enter the access number required, a comma, then the phone number.

         • Click Dial.
           

1. 3. Enter OnLine (Debug) mode.
       

   4. To break the data link, click Hang-Up.

When you dial a remote modem using U90 Ladder, a window opens up in the bottom of your screen. The log of events is quickly displayed in this window. This log is stored as a .txt file. You can view this log by navigating to the U90 folder and opening a file named U90ldxxx.txt.

This log is stored as a .txt file. You can view this log by navigating to Unitronics\U90_Ladder\U90Ldxxx and opening a file named ComLog.txt.

In this file, the most recent log of events appears last.