.MER File Extension

RSView Development Runtime File

An MER file (likely stands for "Machine Edition Runtime") is a runtime data file used in industrial automation systems, specifically within Rockwell Automation’s RSView suite, which is a Human-Machine Interface (HMI) software. The MER file is created after the developer has finished working on an automation project and compiled it from a development file (.MED). Once compiled, the MER file is an executable format that contains all the necessary data to run an automation task or control industrial machinery. MER files are often used to run these automation tasks in real-time, making them essential in managing and monitoring complex industrial systems.

MER files were introduced alongside RSView ME and Studio, which were widely used before being phased out in 2021 when Rockwell Automation transitioned to their new FactoryTalk suite. The MER file format has been in use since before this transition, meaning it has played a significant role in the industrial automation landscape for years, especially in the early 2000s.

How .MER Files Are Commonly Used

MER files are primarily used within the RSView (later FactoryTalk) ecosystem to execute automation programs. A developer designs and tests the automation workflow within the RSView software. Once satisfied, they compile the file into the MER format. From there, the file is deployed on machines or systems where the automation tasks need to be carried out. The runtime nature of the file means it doesn't need further modifications—it's ready to run the specified tasks without requiring access to the source code (the MED file).

In more advanced versions of the software, developers could enable a feature allowing an MER file to be converted back into its editable form (MED), though this depends on the developer’s settings when creating the MER file.

Interesting Facts About .MER File Extension

One interesting aspect of MER files is their central role in automating industrial machinery. The RSView suite (and its successor FactoryTalk) has been widely adopted in industries like manufacturing, energy, and water management, making MER files essential in managing critical automation systems worldwide.

How to Open .MER as RSView Development Runtime File

To open or view an MER file, users typically need RSView Machine Edition or RSView Studio, both of which run on Windows. Even though RSView has been discontinued since 2021, it’s still possible to use it to open and execute MER files. For users transitioning to FactoryTalk, compatibility options exist, although direct support for MER files in newer systems may require some adjustments.

If you're trying to open a file that has been compiled with conversion allowed, you can potentially revert it to an MED file for editing. This option is available in RSView versions 6 and later, assuming the file’s creator enabled it during compilation.

Applications That Open MER Files

Windows Apps for MER Files:

• RSView32 Paid