User`s manual

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MELSEC-Q
13 AUTO TUNING
(b) Maximum slope value
Depending on the slope (T2), the following processing is performed and the S. AT1
instruction is terminated.
1) If reverse operation is performed (PN
0) and AT1 stepped manipulated value
(AT1STEPMV)
0 or forward operation is performed (PN 1) and AT1 stepped
manipulated value (AT1STEPMV)
0
Condition Processing
Maximum slope value slope
(T2)
• Maximum slope value
slope (T2)
• Maximum slope-time counter
counter from auto tuning start
• Maximum slope-time PV
input value (E1)
• After maximum slope time-out count value is reset and count is
restarted.
Maximum slope value
Slope(T2)
Maximum slope value remains unchanged from the last value.
2) If forward operation is performed (PN 1) and AT1 stepped manipulated value
(AT1STEPMV)
0 or reverse operation is performed (PN 0) and AT1 stepped
manipulated value (AT1STEPMV)
0
Condition Processing
Maximum slope value
Slope(T2)
• Maximum slope value
slope (T2)
• Maximum slope-time counter
counter from auto tuning start
• Maximum slope-time PV
input value (E1)
• After maximum slope time-out count value is reset and count is
restarted.
Maximum slope value
Slope(T2)
Maximum slope value remains unchanged from the last value.
(10) Identification processing
Using the maximum slope value, the following processing is performed.
(a) Response speed
1) The response speed for calculation (R') and response speed (R) are calculated with the
following expression.
R'
AT1ST
Maximum slope value(%)
,
R
100
|R'|
(/s)
2) If R 0, the following processing is performed and the S. AT1 instruction is terminated.
The identification alarm (BB8) is turned to 1.
The auto tuning completed (BB16) is turned to 1.
When the stepped manipulated value preset flag is 1, the following processing is
performed.
MV MV AT1STEPMV