HotStandBy – Frequently Asked Questions (FAQ).
1) How can I force a server switchover? To do so, there is more than one possibility: Go to E3Admin of the computer in StandBy, and select Server–Activate! option, according…
Category: English
Demo application: Using formulas (a detailed view).
The demo application attached to this articles illustrates the following Formulas’ functions: How to load formulas. How to update formulas. How to create new formulas. How to delete formulas. NOTE:…
KB-34475: Opening or closing a screen according to a tag’s value.
Question: How can I execute a script to open a screen whenever a Boolean tag’s value is 1 (one), and close it when it is 0 (zero)? Solution: To do…
KB-34518: Expand Bits option.
Question: What is Expand Bits option for? Solution: Some PLCs do not allow direct access to bit variables, such as in an input or output. In such cases, you must…
KB-34496: Error when generating the Historic’s structure in an Access Database.
Question: If I try to generate the Historic’s structure in an Access Database, the following error occurs: Why does this happen? Solution: This happens because there is a limit of…
KB-34346: Exporting a formatted report to PDF.
Question: How can I export a formatted report to PDF? Solution: To do so, the only possibility is to use a virtual printer that prints in PDF format. For virtual…
KB-33850: Calculating the standard deviation in a Report.
Question: How can I calculate the standard deviation in data recorded in the database, and display the result in a Report? Solution: This can be done via the Setpoint object’s…
KB-34442: Limiting characters in a Setpoint with a bi-directional link.
Question: How can I set limits to the number of characters that can be read and written in a Setpoint with a bi-directional connection? Solution: To set limits to the…
KB-30836: Installing Elipse E3 in a Sun’s VirtualBox virtual machine.
Question: Why can’t E3 be installed in a Sun’s VirtualBox virtual machine? Solution: For this to happen, the VT-x/AMD-v options must be activated on the host’s and virtual machine’s BIOS…
KB-35519: Creating a dynamic Query to select a table at run time.
Question: In an application, the E3Chart and its Query are in a library to make it easier creating several equal tables. How can I configure a dynamic Query to use…