User`s manual

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MELSEC-Q
13 AUTO TUNING
(4) Input check processing
Either of the following processings is performed depending on the alarm detection (ALM)
setting.
(a) If either of PHA and HHA of the alarm detection (ALM) is 1, the following processing is
performed and the S. AT1 is terminated.
1) The input upper limit alarm (BB3) is turned to 1.
2) The auto tuning completed (BB16) is turned to 1.
(b) If either of PLA and LLA of the alarm detection (ALM) is 1, the following processing is
performed and the S. AT1 is terminated.
1) The input lower limit alarm (BB3) is turned to 1.
2) The auto tuning completed (BB16) is turned to 1.
(5) Time-out judgement processing
Whether the auto tuning processing has reached the AT1 time-out time (AT1TOUT1) or not is
judged.
(a) If the AT1 time-out time (AT1TOUT1) is reached, the following processing is performed and
the S. AT1 is terminated.
1) The time-out alarm (BB6) is turned to 1.
2) The auto tuning completed (BB16) is turned to 1.
(b) If the AT1 time-out time (AT1TOUT1) is not reached, "(6) After maximum slope time-out
judgment processing" is performed.
(6) After maximum slope time-out judgment processing
Whether the auto tuning processing has reached the AT1 after maximum slope time-out time
(AT1TOUT2) or not is judged.
However, if the after maximum slope time-out time counter initial preset flag is 0, the
processing in (c) is performed.
(a) If the AT1 after maximum slope time-out time (AT1TOUT2) is reached, "(10) Identification
processing" is performed.
(b) If the AT1 after maximum slope time-out time (AT1TOUT2) is not reached, "(7) Stepped
manipulated value set processing" is performed.
(c) If the after maximum slope time-out time counter initial preset flag is 0, "(7) Stepped
manipulated value set processing" is performed.
(7) Stepped manipulated value set processing
Whether the stepped manipulated value is "set (1)" or "not set (0)" is judged from the stepped
manipulated value preset flag.
(a) If the stepped manipulated value preset flag is 0, the following processing is performed and
the S. AT1 is terminated.
1) The AT1 stepped manipulated value (AT1STEPMV) is added to the manipulated value
(MV).
T1 MV AT1STEPMV