KB-33906: Hot-Standby x Databases.
Question: What is the proper architecture to work with databases in Hot-Standby? Solution: There are two possibilities: Two computers running E3Server (Hot and Standby), and a third one running the…
Category: Elipse E3
KB-31801: Integrity Ping in Hot-Standby settings.
Question: What is an Integrity Ping in Hot-Standby settings? Is it really necessary? Solution: Setting up the Integrity Ping is essential for the Hot-Standby mode to work correctly! The Hot-Standby…
KB-26057: Viewer’s behavior during servers’ switchover.
Question: What is the Viewer‘s typical behavior during a servers’ switchover in Hot-Standby? Solution: The Viewer switches servers automatically, and will always connect to the active E3Server. However, communication is…
KB-31289: Time of switchover between Hot-Standby servers.
Question: How long will it take the standby application to take over as the main application in a servers’ switchover? Solution: This time cannot be gauged precisely because it is…
KB-32409: Domain automatic initialization.
Question: How can I set the Domain to run automatically whenever the computer starts up? Solution: To do so, follow these procedures: Go to E3Studio and load the intended domain.…
KB-47537: Measuring arrays.
Question: Is there any function that will help me find out an array’s size? Solution: Yes. To do so, you must use Ubound function. Example of script running in a button…
Sample simCLP application simulating a PLC via OPC server.
Introduction Oftentimes, when developing applications with SCADA software, you will need to perform tests where I/O tags must be either forced or simulated. This article will show you how to…
KB-31755: Advantages of OPC communication.
Question: What are the advantages of communicating via OPC client/server? Solution: Some advantages of communicating via OPC are: Drivers’ easy configuration: once the tag base is created in the OPC…
KB-28611: Importing OPC tags.
Question: Why is an OPC tag imported from an E3 Server displayed as folder containing several properties? Solution: OPC tags are imported as folders containing its main properties. If necessary,…
KB-39425: OPC communication not working, even after DCOM has been set up.
Question: Why is OPC communication working properly in E3Studio, but not when being executed (even after DCOM has been set up)? Solution: This happens because the OPC Server cannot be…