> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/security/24-hour-automatic-reset-pci-requirement.md).

# 24 Hour Automatic Reset PCI Requirement

Due to Payment Card Industry (PCI) certification requirements, the device must automatically reset at least once every 24 hours. This is required for security purposes, so that the device can reinitialize memory and perform a self-test. Host software developers and potentially end users should be aware of this.

By default, the device will automatically reset 23 hours after it boots up and it will attempt to send a warning notification message to the host 3 minutes before the reset occurs.

The default behavior is adjustable. See the following for more information:

* Property 1.2.7.1.1.4 Auto Reset Configuration
* Property 1.2.7.1.1.3 Device Reset Will Occur Soon Notification Control
* Device Reset Will Occur Soon notification in Notification 0x1001 - Device Information Update

One way the host software could handle receiving a device reset-will-occur notification:

{% stepper %}
{% step %}
Cancel any operation that is in process (for example, a transaction) if it is unlikely to end before the reset.
{% endstep %}

{% step %}
Optionally send Command 0x1F01 - Reset Device instead of waiting for the automatic reset to occur.
{% endstep %}

{% step %}
Re-connect with the device and re-start any operation that was in process.
{% endstep %}
{% endstepper %}


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