Mitsubishi Electric MELSEC iQ-R Series - Page 1253

11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
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11
■SV setting processing (1)
The following processing is performed depending on the control mode (MODE) setting.
■Tracking processing (2)
• The set value (SV) is inversely transformed from the engineering value and SV
n
' is calculated (refer to the following
expression).
• Tracking processing is performed when all of the following conditions are satisfied.
• 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.
• The output gain (K) is calculated under the following conditions.
Control mode (MODE) setting Processing details
CAS, CCB, CSV • 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.
• If the set value (E2) is not specified, "tracking processing (2)" is performed without
performing engineering value transformation processing.
MAN, AUT, CMV, CMB, CAB, LCM, LCA, LCC "Tracking processing (2)" is performed.
• 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
'
Condition Operational expression
Direct action (PN = 1) DV = E1 - SV
n
'
Reserve action (PN = 0) DV = SV
n
' - E1
Condition Operational expression
|DV|  GW K = GG
|DV| > GW
SV
n
= ×E2+RL
100
RH-RL
SV
n
'=
×(SV
n
-RL)
RH-RL
100
K=1-
|DV|
(1-GG)×GW