Description

This program dials out, once per hour, from a 5901 Dial-Up modem, (interfaced with a Master SCADAPack's Com2 port), connects to a slave controller (via its dial-up modem) and transfers data using four MSTR function elements and Modbus RTU protocol.

Upon power-up, a 3600 sec (one hour) timer is started. When the timer elapses, a DIAL function is enabled. When the DIAL function indicates that the modems have connected, a 5 sec timer is started. When the timer elapses, the MSTR Enable bit is set and four MSTR elements are enabled sequentially. If any MSTR message fails, up to two more retries are attempted before cycling on to then next MSTR. When the last MSTR is completed, the 3600 sec timer is reset and the DIAL function disabled. The cycle begins again.

The Register Editor dialog has been pre-configured to display all pertinent registers used in this program.

The Register Assignment has been pre-configured with the SCADAPack 5601 I/O Module and the DIAG Serial Port Protocol Status (Com2) module.

Refer to the "Ladder Logic Function Reference | Ladder Logic Function Reference | Ladder Logic Functions" section of the "TelePACE User and Reference Manual" for information on the DIAL, UCTR, T1, CMPU and MSTR functions.

Instructions

To use this sample program:

Select the following link: MB_DIAL.ZIP
Select the Open button. (Winzip is opened)
Select the Use Evaluation Version button. (The Winzip program list is displayed)
From Winzip, select both files in the display list and then extract both files to a target folder on your computer.
Exit Winzip.

Open the TelePACE application.
Select File | Open to display the Open File dialog box.
Browse to the appropriate directory where the files are located and select the .LAD file.
Select the OK button to open the file.