• Shawn Tierney commented on lesson Lesson 04: Logix Hardware Part 1 5 years ago

    Good morning cbruder,

    Yes, there are a couple of indications that your 1756-ESMCAP “energy storage” module is bad:
    – “ESM” scrolling across the L7x's display.
    – If you have “Energy Storage” selected under “Minors Faults” in Controller Properties, then you would get Minor Fault Bit 10 if the module is faulty.

    Note that the module is designed to last ten years, and will typically keep your controller's wall clock running for 7-12 days when power is turned off.

    Hope this helps,

    Shawn Tierney,
    Instructor at The Automation School