Curtis 1244 User Manual page 86

APPENDIX A: GLOSSARY
Fault categories
The 1244 controller is equipped with two fault drivers. These drivers can be
configured to provide information in "fault category" or "fault code" format.
If the drivers are configured in "fault category" format, they will indicate one
of three categories of faults. The Fault Categories are defined in Table 7—see
Section 8, page 75.
Fault codes
The 1244 controller provides fault information by flashing Fault Codes. When
a fault occurs, the fault code can be read directly from the Status LED built
into the controller's cover. In addition, the controller has two output drivers
that can be configured to provide information in "fault category" or "fault code"
format. If the drivers are configured in "fault code" format, they will drive fault
indicator LEDs located on a remote panel. The information displayed by these
remote panel LEDs will be identical to that displayed by the controller's built-
in Status LED. The Fault Codes are defined in Table 6—see Section 8, page 74.
Fault detection and response
An internal microcontroller automatically maintains surveillance over the
functioning of the controller. When a fault is detected, the appropriate fault
code is signalled via the controller's built-in Status LED, which is externally
visible through the label on top of the controller. If the fault is critical, the
controller is disabled. More typically, the fault is a remediable condition and
temporary—for example, an HPD fault is cleared when the throttle is returned
to neutral. The faults covered by the 1244 controller's automatic fault detection
system are listed in Table 5—see Section 8, page 73.
Fault recording
Fault events are recorded in the controller's diagnostic history file. Multiple
occurrences of the same fault are recorded as one occurrence. This fault event
list can be loaded into the programmer for readout. The programmer's Diagnos-
tics Menu provides access to the controller's diagnostic history file—the entire
fault event list created since the diagnostic history file was last cleared. The
Diagnostics Menu also provides information about the currently active faults.
A-4
Curtis 1244 Manual,
Rev. E