Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1261

■SV setting processing (1)
The following processing is performed depending on the control mode (MODE) setting.
Control mode (MODE)
CAS, CCB, CSV
MAN, AUT, CMV, CMB, CAB, LCM, LCA, LCC
■Tracking processing (2)
• The set value (SV) is inversely transformed from the engineering value and SV
expression).
100
SV '= ×(SV -RL)
n n
RH-RL
• Tracking processing is performed when all of the following conditions are satisfied.
• The tracking bit (TRK) is set to 1.
• The set value (E2) is used.
• The control mode (MODE) is set to any of the following: MAN, AUT, CMV, CMB, CAB, LCM, LCA, or LCC.
E2 = SV '
n
• If the set value (E2) is the upper loop MV, the TRKF of the disable alarm detection (INH) of the upper loop is set to 1.
■Gain (Kp) operation processing (3)
• The deviation (DV) is calculated under the following conditions.
Condition
Direct action (PN = 1)
Reserve action (PN = 0)
• The output gain (K) is calculated under the following conditions.
Condition
|DV|  GW
|DV| > GW
■SPI operation (4)
The SPI operation is performed with the following operational expression.
Item
During operating time (ST)
During hold time (sample cycle
(STHT) - operating time (ST))
K : Kgain (P),T : integral constant (I),BT: execution cycle(T)
P I
Processing details
• If the set value (E2) is specified, engineering value transformation processing (refer to the
following expression) is performed, and then "tracking processing (2)" is performed.
RH-RL
SV =
n
100
• If the set value (E2) is not specified, "tracking processing (2)" is performed without
performing engineering value transformation processing.
"Tracking processing (2)" is performed.
Operational expression
DV = E1 - SV '
n
DV = SV ' - E1
n
Operational expression
K = GG
(1-GG)×GW
K=1-
|DV|
Operational expression
BT
BW=K ×{(DV -DV )+ ×DV }
P n n-1 n
T
I
BW = 0 (Note that the loop tag past value memory is not set.)
×E2+RL
' is calculated (refer to the following
n
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
11
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