ABB UFC760BE1142 programmable control module
The Triguard SC300E has an operating
system known as the Real Time Task
Supervisor (RTTS), which is installed
in each of the three processors. The
operating system has been proven by
well over 10 million operational hours.
RTTS is transparent to the user, it
controls the off-line/start-up and
on-line continuous diagnostic and
voting functions, and provides a single
environment for the application
programming.
On power up, comprehensive
diagnostic routines check and validate
the correct operating parameters of
each processor.
The Triguard SC300E operating
system, RTTS, will permit the
processors to operate in a 3–2–1
format allowing a system to continue
to function with one healthy
processor. A replaced processor will
automatically acquire the data it
requires to become operational from
the on-line processor before going
on-line.

Input/Output Modules
All I/O module types share an
element of common design, providing
component rationalisation and
implementing distributed processing.
The three isolated TMR signal paths of
all input/output modules are
supervised by a micro-controllers
which:
• Provides fault isolation
• Co-ordinate signal processing
• Provides diagnostics
• Provides on-line to off-line
switching (hot repair)
• Provides data validation routines
• Provides data to the processor
• Provides latent fault detection
A fault in one signal path cannot be
passed to another. I/O modules can
be fitted in any of the 10 slots in any
chassis. “Hot Repair” is a customer
configurable option on a per module
basis. All modules are “keyed” to
prevent improper installation.