Specifications

30 209351 REV B Operations Manual, Redundant System Controllers
Major SSPA faults are represented as HPAXXX, where “X” could be “1” or “0” depending
on the state of the individual pin of external faults port. The left-most digit serves as the
indicator for SSPA Unit 3 and the right-most for SSPA Unit 1. The fault state of the RCP
unit depends on the selected fault logic and selected system type.
For more information about advanced troubleshooting, see Section 4.7.
Ux Standby refers to the selected default standby unit. “x” can be a digit from 1 to 3 and
indicates which unit was selected as the default standby unit. This unit is usually
selected by the user in the initial RCP setup. The selected unit will remain on standby
under RCP manual mode or Auto mode (in condition when all units considered in
“Normal” non-faulted condition). Of course, under “Auto” mode, the default standby unit
will be put “Online” if required. Under Auto mode, the RCP always keeps track of the
unit’s reliability record and can reassign default standby state to the unit with the worst
reliability record. The unit will be assigned automatically to the default standby state if its
fault state was switched from “Normal” to “Fault” more then 2 times since last user
intervention. Any user intervention to the units standby setup will clear all reliability
record.
3.3.1.6 Sys Info - Page 6
This page provides additional system information (firmware version 3.7.0 or better).
Operation Mode provides information regarding the current controller operation mode
and switching logic. Indicated status: 1:1 Mode; 1:2 Mode; 1:1 Phase Combined; Dual
1:1 Mode.
Fault Tolerance refers to advanced controller behavior. There are three settings,
“None”, “1 Fault” and “2 Faults”, which are set via the Options menu (Section 3.3.5.7).
“None” pertains to no fault tolerance schema. Every fault occurred to the online unit will
take this unit offline permanently. Even after the fault condition is cleared, the unit will
stay off line until the user selects otherwise, or other control units develop a fault. No
fault tolerance schema is implemented to minimize switching, but not establish
preferences to the selected system configuration.
“1 Fault” is the factory default schema, and pertains to one fault tolerance. A faulted
online unit will be automatically set online after the fault is cleared. In case of two
sequential fault occurrences, the unit will be set offline permanently. This configuration
provides a balanced compromise between minimal fault switching and favoring a
particular unit online/standby selection.
“2 Faults” is similar to the “1 Fault” schema, but requires the occurrence of two
sequential faults before changing the favored system configuration.