ABB Symphony Harmony Series, Инструкция, Страница: 191 / 402

6 - 12 WBPEEUI240751C0
Function Codes
For redundant
redundant redundant
redundant inputs and outputs, the function code reports a
suspect condition when:
•
Redundant digital input states are good quality but do not
match.
•
Redundant digital output states (readback) are good qual-
ity but do not match.
•
Redundant analog input values are good quality but there
is a difference between the redundant analog inputs and
the difference is greater than the deviation limit specified
in the function code.
•
Redundant analog output values (readback) are good qual-
ity but there is a difference between the readback values
for the redundant analog outputs and the difference is
greater than the deviation limit specified in the function
code.
In this case, suspect warns that if a failover from primary to
backup should occur, the difference in redundant values may
be significant enough to cause a process upset.
For
override and simulation override and simulation override and simulation override and simulation
inputs and outputs, the function
code reports a suspect condition when:
•
While in override or simulation mode, the override or simu-
lation digital input state does not match the actual digital
input state.
•
While in override mode, the override digital output state
does not match the readback output demand state.
•
While in override mode, there is a difference between the
override analog input value and the actual input value and
the difference is greater than the deviation limit specified
in the function code.
•
While in simulation mode, there is a difference between the
simulation analog input value and the actual input value
and the difference is greater than the deviation limit speci-
fied in the function code.
•
While in override mode, there is a difference between the
override analog output value and the readback output
demand value and the difference is greater than the devia-
tion limit specified in the function code.