Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 448

Condition
ML_CL  Result of variation rate limiter processing for
cooling  MH_CL
MH_CL: Output high limit for cooling, ML_CL: Output low limit for cooling
■Tight shut/full open
This tight shut/full open function is used to completely open or close a control valve.
The processing result is reduced to the output value for tight shut when MV_HT or MV_CL is 0% or less, and the result is
increased to the output value for full open when a MV_HT or MV_CL is 100% or more.
• When FOTS_HT_EN or FOTS_CL_EN is TRUE
Processing result
MVF0_HT(MVF0_CL)
100%
0%
MVTS_HT(MVTS_CL)
MVTS_HT: Heating output value for tight shut (%)
MVTS_CL: Cooling output value for tight shut (%)
MVFO_HT: Heating output value for full open (%)
MVFO_CL: Cooling output value for full open (%)
■MV reverse
This function block performs inversion processing (100 - MV) to a manipulated value.
• MV reverse for heating
Condition
MVREV_HT_EN = TRUE
MVREV_HT_EN = FALSE
MVREV_HT: Heating output after processing of MV reverse for internal operation (%), MV_HT: Heating manipulated variable (%)
• MV reverse for cooling
Condition
MVREV_CL_EN = TRUE
MVREV_CL_EN = FALSE
MVREV_CL: Cooling output after processing of MV reverse for internal operation (%), MV_CL: Cooling manipulated variable (%)
12 LOOP TAG
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12.40 Heating and Cooling Output (M+M_HTCL_T_)
High/low limiter processing
result
Variation rate limiter processing
value for cooling
MV_HT(MV_CL)
0% 100%
Alarm (ALM)
Output low limit alarm
(MLA_CL)
FALSE (Reset)
Processing result
MVREV_HT = 100 - MV_HT
MVREV_HT = MV_HT
Processing result
MVREV_CL = 100 - MV_CL
MVREV_CL = MV_CL
Output high limit alarm
(MHA_CL)
FALSE (Reset)