3.11 Self-supervision 3 Supporting functions Technical description
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3.11.1. Diagnostics
The device runs self-diagnostic tests for hardware and software
in every boot sequence and also performs runtime checking.
Fatal errors
If fatal error has been detected, the device releases IF relay
contact and error led is set on. Local panel will also display an
error message about the detected fault. Fatal error state is
entered when the device is not able to handle protections.
Runtime errors
When self-diagnostic function detects a fault, Selfdiag Alarm
matrix signal is set and an event (E56) is generated. In case the
error was only temporary, an off event is generated (E57). Self
diagnostic error can be reset via local panel interface.
Error registers
There are four 16-bit error registers which are readable
through remote protocols. The following table shows the
meaning of each error register and their bits.
Register Bit Code Description
0 (LSB) T1
1 T2
2 T3
3 T4
SelfDiag1
4 A1
Output relay fault
0 (LSB) DAC mA-output fault
1 STACK OS: stack fault
2 MemChk OS: memory fault
3 BGTask OS: background task timeout
4 DI Digital input fault (DI1, DI2)
5
6 Arc Arc card fault
7 SecPulse Hardware error
8 RangeChk DB: Setting outside range
9 CPULoad OS: overload
10 +24V
11 -15V
Internal voltage fault
12 ITemp Internal temperature too high
13 ADChk1 A/D converter error
14 ADChk2 A/D converter error
SelfDiag3
15 (MSB) E2prom E2prom error
0 (LSB) +12V Internal voltage fault
SelfDiag4
1 ComBuff BUS: buffer error
The error code is displayed in self diagnostic events and on the
diagnostic menu on local panel and VAMPSET.
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