Description

This demo program monitors slave Modbus TCP traffic on the SCADAPack 32's LAN port. It compares the current scan's count of Slave Commands Received to the previous scan's, and resets a timeout timer if the two counts are not the same (indicating that messages are coming in to the LAN port).
If the two values are the same (indicating that no new messages are coming in) the timeout timer is allowed to count up to a preset value (default 60s) and transfers the current real time clock values into a group of variables.

All ISaGRAF project files associated with this sample program have been archived to a single file with the extension ".pia".

Instructions

To utlilize this sample program:

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

• Open the ISaGRAF Projects application.
• Select the Tools | Archive | Projects command.
• Select the Browse button.
• Browse to the target folder specified during the previous download procedure.
• Highlight the sample project name in the Archive list and select the Restore button. (the project is unzipped to the ISaGRAF workbench).
• Select the Close button.
• The sample project name should now appear in the project list.
• Double click on the sample project to open it.