Description

• This program transfers data between a master SCADAPack (Com2) and a slave controller using four MSTR function elements and Modbus RTU protocol.

• Four MSTR elements are enabled sequentially. If the message is successful, the next MSTR element is enabled. 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 cycle begins again.

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

• The controller type has been pre-selected as SCADAPack.

• 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 UCTR, CMPU and MSTR functions.

Instructions

To use this sample program:

• Select the following link: MB_MSTR.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.