User`s manual

9 - 38 9 - 38
MELSEC-Q
9 CONTROL OPERATION INSTRUCTIONS
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.
E2
RL
100
SV
n
RH
RL
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'.
(SV
n
RL
100
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 SVn'
(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 Operation expression
Forward operation (PN
1) DV
E1
SV
n'
Reverse operation (PN 0) DV SV
n'
E1
(b) The output gain (K) is calculated under the following condition.
Condition Operation expression
When |DV| GW K GG
When |DV| GW
1
(1
K
|DV|
GG) GW