Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 449

■Output conversion
This function block performs output conversion processing.
Converted output (MVN_HT, MVN_CL)
NMAX_HT
(NMAX_CL)
NMIN_HT
(NMIN_CL)
(-10(%)) 0(%)
Converted output (MVN_HT) = {(NMAX_HT - NMIN_HT) ×
Converted output (MVN_CL) = {(NMAX_CL - NMIN_CL) ×
NMAX_HT: Heating output conversion high limit value
NMIN_HT: Heating output conversion low limit value
MVREV_HT: Heating output after processing of MV reverse for internal operation (%)
MVN_HT: Heating output conversion output value,
NMAX_CL: Cooling output conversion high limit value
NMIN_CL: Cooling output conversion low limit value
MVREV_CL: Cooling output after processing of MV reverse for internal operation (%)
MVN_CL: Cooling output conversion output value
■Tracking processing
The following table shows whether tracking processing to the input variable CASIN_T is performed or not.
Condition
Tracking Flag (TRK)
1
0
■Auto tuning result reflection function
This function block reflects the auto tuning result in the primary loop to tag data of this tag FB.
The following shows the procedure to calculate PID parameters for heating and cooling with auto tuning in the primary loop.
1.
Set the control mode of this tag to the CAS mode.
2.
Set the target to reflect results of auto tuning (PRM_SEL) to Heating (1).
3.
Perform auto tuning for heating in the primary loop. When auto tuning in the primary loop is completed successfully, the
result of the auto tuning is reflected to the PID parameter for heating of this tag FB.
4.
Set the target to reflect results of auto tuning (PRM_SEL) to Cooling (2).
5.
Perform auto tuning for cooling in the primary loop. When auto tuning in the primary loop is completed successfully, the
result of the auto tuning is reflected to the PID parameter for cooling of this tag FB.
Condition
SVPTN_B0 = FALSE and SVPTN_B1 = FALSE
PRM_SEL: Target to reflect results of auto tuning
For details on the auto tuning, refer to the following.
Page 594 Auto tuning
100(%) 110(%)
MVREV_HT
} + NMIN_HT
100
MVREV_CL
} + NMIN_CL
100
Setting Value (SV) Used
(SVPTN_B0)
FALSE
TRUE
FALSE or TRUE
PRM_SEL = 0
PRM_SEL = 1
PRM_SEL = 2
PRM_SEL = 3
Manipulated variable
(MVREV_HT, MVREV_CL)
Result
The input variable CASIN_T is tracked.
The input variable CASIN_T is not tracked.
Tag data that stores the result of auto tuning
Not stored.
PID parameters for heating (P_HT, I_HT, D_HT)
PID parameters for cooling (P_CL, I_CL, D_CL)
PID parameters for heating and cooling (P_HT, I_HT, D_HT, P_CL, I_CL,
D_CL)
12.40 Heating and Cooling Output (M+M_HTCL_T_)
12
12 LOOP TAG
447