ABB ControlIT 53MC5000 Instruction Manual page 184

Table 5-14. System Module
Title
EASY-TUNE Unsuccessful Status Display
B387 =
51
52
53
54
55
Status
(Cont.) 56
57
58
59
60
61
Definition
Description
Controller output was saturated.
Saturation would have occurred
if EASY-TUNE had continued.
PV excursion exceeded the limit.
Controller output was changed
externally, i.e. deliberately or
accidentally.
A time-out had occurred when
B387 was 1.
A time-out had occurred when
B387 was 2.
A time-out had occurred when
B387 was 3.
A time-out had occurred when
B387 was 4.
A time-out had occurred when
B387 was 5.
L521 was set to 1.
Tuning parameter limit(s) were
exceeded and used in the
controller.
Suggested Action or Cause/Retry
Controller output was saturated at
the start.
Reverse the sign of step size
configured in C381.
Reduce the step size magnitude in
C381 or increase MAX PV excursion
limit in C380.
Don't change output manually or
through the F-Tran program.
Increase the digital filter index
and/or the limiting time in C379.
Either increase the limiting settling
time in C379, increase C381 or
decrease C378.
Disturbance may have occurred
during EASY-TUNE.
Disturbance may have occurred
during EASY-TUNE.
Disturbance may have occurred
during EASY-TUNE.
EASY-TUNE was deliberately
terminated.
Widen the tuning parameter limits
in C385-C390 or set L520 to 0.
Atom Data- De-
point fault
ESTAT B387 0