Error-Status Selfoptimization
4.3.3
Acknowledgement procedures in case of unsuccessful self-tuning
1. Press keys
Ù
and
È
simultaneously:
The controller continues controlling using the old parameters
The Err LED continues blinking, until the self-tuning error was
acknowledged in the error list.
2. Press key
Ù
:
Display of error list at extended operating level. After acknowledgement
of the error message, the controller continues control using the old
parameters.
Controller
Digital 280-1
Self-tuning
19
Error status Description
Behaviour
0
No error
3
Faulty control action
Re-configure controller (inverse
i
direct)
4
No response of process variable The control loop is perhaps not closed: check
sensor, connections and process
5
Low reversal point
Increase ( ADA.H) max. output limiting Y.Hi or
decrease ( ADA.C) min. output limiting Y.Lo
6
Danger of exceeded set-point
(parameter determined)
If necessary, increase (inverse) or reduce (direct)
set-point
7
Output step change too small
(dy > 5%)
Increase ( ADA.H) max. output limiting Y.Hi or
reduce ( ADA.C) min. output limiting Y.Lo
8
Set-point reserve too small
Increase set-point (inverse), reduce set-point
(direct) or increase set-point range(r PArA / SEtp
/ SP.LO and SP.Hi )
Summary of Contents for Digital 280-1
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Page 49: ...Notes 49 Digital 280 1...
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