Mitsubishi MELSEC-Q series Programming Manual page 97

Set Data
Processing contents
(1) SV setting processing
Either of the following processings is performed depending on the operation mode (MODE) setting.
(a) When the operation mode (MODE) is any of CAS, CCB and CSV
1) When the set value (E2) is specified, engineering value conversion is performed with the following expression
and then "(2) Tracking processing" is performed.
RH RL
SV
n
100
2) When the set value (E2) is not specified, "(2) Tracking processing" is performed without the engineering value
conversion being performed.
(b) When the operation mode (MODE) is any of MAN, AUT, CMV, CMB, CAB, LCM, LCA and LCC, "(2) Tracking
processing" is performed.
(2) Tracking processing
(a) The set value (SV) is converted reversely from the engineering value with the following operation expression to
calculate SVn'.
100
SV ' (SV
n
RH RL
(b) When all of the following conditions hold, tracking processing is performed.
1) The tracking bit (TRK) of the operation constant is 1.
2) The set value (E2) is used.
3) The operation mode (MODE) is any of MAN, AUT, CMV, CMB, CAB, LCM, LCA and LCC.
E2=SV '
n
(c) When the set value (E2) is the manipulated value (MV) of the upper loop, the tracking flag (TRKF) of the alarm
detection inhibition (INH) in the upper loop turns to 1.
(3) Gain (Kp) operation processing
(a) The deviation (DV) is calculated under the following condition.
Condition
Forward operation(PN=1)
Reverse operation(PN=0)
(b) The output gain (K) is calculated under the following condition.
Condition
When |DV|  GW
When |DV| > GW
E2 RL
RL)
n
Operation expression
DV=E1 - SV '
n
DV=SV ' - E1
n
Operation expression
K=GG
(1 GG) GW
K 1
|DV|
S.PID
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