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Issue 5 - September 2006
Page 55 of 65
11 Appendix 4 - RTTS versions 8.30-005 and later versions
11.1 System Error Flags for RTTS version 8.30-005 and later versions
The following diagnostic flags are available from the ‘FALT’ call and can be incorporated in
the system application logic to drive local alarm indicators and be transmitted to other
systems or workstations.
Bit Reference Description
0
History
Entry in history table - errors logged relating to
processors and communications
1
Data/Voting
2oo3 voting error – voting discrepancies
encountered and logged by the processors during
I/O scanning
2
LFD
latent fault detection of failed on or failed off signal
paths – monitor and fault bits set depending on
fault type and location
3
Monitor
Initialisation error – bits are set in the fault or
monitor registers
4
INIT
System initialisation error – modules referenced in
the table of operations are missing. Either a single
slot module or both modules missing/offline in a
dual slot hot repair partnership.
5
MPP A
Processor A failure – out of synchronisation
6
MPP B
Processor B failure – out of synchronisation
7
MPP C
Processor C failure – out of synchronisation
8
MPP A power
Processor A loss of power – fuse or PSU
9
MPP B power
Processor B loss of power – fuse or PSU
10
MPP C power
Processor C loss of power – fuse or PSU
11 MPP
low
Battery
Memory battery - low charge on one or more of the
processor’s batteries
12
Off-line module
Single slot repair - module off-line – should be on-
line.
13
Global Output
Fault on any output module(s)
14
Multiple fault
Multiple faults on a module
15 Reserved
Table 6 FALT flags RTTS 8.30-005 and later
FALT bit 4
- Initialisation error can be cleared when both modules or the only module of a hot
repair partnership are installed in the chassis but are off-line. The application may be restarted
when this flag is cleared by use of the Clear History command with the modules off-line.
Whenever the initialisation flag is set, after all corrective actions have been taken to repair a
SC300E system, the Configuration Report MUST be inspected for off-line modules prior to
clearing the history table and restarting the application.
FALT Bit 13
- Global Output fault - this bit indicates that there is an error with at least one output
module (Piano, AO or DO) in the system.