Note:
We recommend that you do not set the triggering contact to latching. This is because if you use a latching contact,
the fault record would not be generated until the contact has been fully reset.
2.2.5 MAINTENANCE EVENTS
Internal failures detected by the self-test procedures are logged as maintenance records. Maintenance
records are special types of standard events.
The event type description shown in the Event Text
cell for this type of event is always Maint Recorded.
The Event Value cell also provides a unique binary code.
The IED contains a separate register containing the latest maintenance records. This provides a convenient
way of viewing the latest maintenance records and saves searching through the event log. You access these
fault records using the Select Maint setting.
The maintenance record has a number of extra menu cells relating to the maintenance event. These
parameters are Maint Text, Maint Type and Maint Data. They contain details about the maintenance event
selected with the Select Maint cell.
The possible maintenance records are as follows:
Event Value Event Text Description
6 FPGA Health Err There is a Field Programmable Gate Array error
7 IO Card Error There is an I/O card error
9 Code Verify Fail There is a code verification failure
14 Software Failure There is a general software failure
15 H/W Verify Fail There is a hardware verification failure
16 Non Standard There is a non-standard error
17 Ana. Sample Fail There is a failure with the analogue signal sampling
18 NIC Soft Error There is a Network Interface Card error
22 PSL Latch Reset A PSL latch has been reset
23 Control IP Reset A control input has been reset
24 Fn Keys Reset A function key has been reset
25 SR Gates Reset An SR gate has been reset
26 System Error There is a system error
27 Solicited Reboot The device has been requested to reboot
28 Unrec'ble Error
There is an unrecoverable internal error. The device will reboot after the maintenance record has been
created
29 Lockout Request
A lockout has been requested. This is generated whenever maintenance access is gained through the
USB port
30 IO Upgrade Fail
There has been an I/O upgrade failure. This can be caused by a faulty I/O card, or the boot loader
enable bit on the micro-controller being disabled
31 Application Fail An application has failed
32 System Restart Not used
33 Unknown Error There is an unknown error
34 FPGA Failure The Field Programmable Gate Array has failed
35 Upgrade Mode Req
Upgrade mode has been requested. This is generated whenever maintenance access is gained through
the USB port
36 Invalid MAC Addr The device has an invalid MAC address
Chapter 6 - Monitoring and Control MiCOM P747
156 P747-TM-EN-1
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