Operating & Maintenance Instructions 71
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© Honeywell - M450 001 1D - 23.05.2019
35.2. APPENDIX B - Event/Alarm Logs
Events Logs are structured as follows:
Security Log
Event / Alert Code Meaning
Clock not adjusted (adjustment greater than 10
seconds) or outside the validity period if via a set
clock command
Comms Hub Device Log Changed
Firmware Verification Failed
Integrity check of content or format of command
failed
Unauthorised Communication Access attempted
Unauthorised Physical Access - Tamper Detect
Mandated -
conditional
group 1
Change in the executing Firmware version
Credit would cause Meter Balance to exceed
Maximum Meter Balance Threshold
Device Unjoining succeeded
Device's own Digital Signing Certificate
replacement failed
Device's own Digital Signing Certificate
replacement succeeded
Device's own Key Agreement Certificate
replacement failed
Device's own Key Agreement Certificate
replacement succeeded
Failed Authentication or Authorisation not covered
by other codes
UTRN exceeds Maximum Credit Threshold
Unusual numbers of malformed, out-of-order or
unexpected Commands received
Update Security Credentials
Firmware Verification Successful
Unauthorised Physical Access - Meter Cover
Removed
Mandated -
conditional
group 1
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