Recovery button - Metasys - M4-SNE10502-0 - M4-SNE22002-0 - M4-SNE110L2-0 - M4-SNE11002-0 - Supervisory Device - Network Engine - 16.0

M4-SNE Installation Guide
Product
Document revision
N
Version
16.0
Revision date
2026-06-03
Product status
Active
docpartnumberlabel
Part No.
Part number
24-10143-01647

Use the Recovery button to recover device functionality and to reset a network engine supervisory controller to a known state if its operation becomes unreliable and cannot be fixed with standard procedures.

Use this button to resolve the following types of conditions:
  • Forgotten password
  • Device restarts continuously
  • Device is unresponsive
  • Device is unable to successfully download code from SCT
    Note: The firmware version on the inactive partition may be older than the version on the active partition and may lack the security enhancements of the newer, active partition. If the Recovery button is pressed to change partitions it is possible that the older firmware may revert to the older recovery button behavior. To check which release is installed on the active partition, press the Recovery button and release after 1 second. If this has no effect, the newer firmware version is active and behaves as described below. If this initiates the recovery sequence, the older version is active and will exhibit older recovery button behavior.

Recovery to same partition

Press and hold the Recovery button continuously for 5-10 seconds. After 5 seconds, the fault LED starts blinking once every second, which indicates that you can release the Recovery button to invoke the same partition recovery. When you release the Recovery button, the Heartbeat LED is solid ON. To apply same partition recovery, release the button before 10 seconds. The following sequence occurs:
  1. Reverts to factory default archive.
  2. Defaults the engine's supervisory controller's hostname to SNx and MAC address.
  3. Defaults the IP address to DHCP.
  4. Reverts to the factory default security database.

    Recovery is complete when the Heartbeat LED starts to blink at 1 second intervals.

Recovery to inactive partition

Press and hold the Recovery button continuously for at least 10 seconds to invoke inactive partition recovery. Do NOT release the button before 10 seconds, or the inactive partition recovery process will not begin. After 10 seconds, the fault LED blinks 5 times a second, which indicates that you can release the Recovery button to invoke inactive partition recovery. When you release the Recovery button, the Heartbeat LED is solid ON. The following sequence occurs:
  1. Reverts to factory default archive.
  2. Defaults the engine's supervisory controller's hostname to SNx and MAC address.
  3. Defaults the IP address to DHCP.
  4. Reverts to the factory default security database.
  5. Runs on the opposite partition, possible with a different installed release.
    Recovery is complete when the Heartbeat LED starts to blink at 1 second.
    Note: To determine which partition is currently active, open the Metasys UI and locate the Update object of the network engine under the network tree. The Active System Partition attribute is visible from the detail window of the Update object. Partition 0 is A and partition 1 is B.
    Note: To determine which partition is currently active, open the FX SNC UI and locate the Update object of the F4-SNC Supervisory Controller under the network tree. The Active System Partition attribute is visible from the detail window of the Update object. Partition 0 is A and partition 1 is B.