Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 85

Processing details
■Temperature/pressure correction processing
This function block executes temperature/pressure correction (or either of temperature correction or pressure correction) to
the differential pressure (%) value input from the input variable IN and outputs the result from the output variable OUT_.
Temperature/pressure correction selection
Temperature correction Pressure correction
(T_) (P_)
TRUE TRUE
FALSE TRUE
TRUE FALSE
T_: Temperature correction selection
P_: Pressure correction selection
IN: Differential pressure input (%)
PVTEMP: Measured temperature (engineering value)
PVPRES: Measured pressure (engineering value)
TEMP: Design temperature T' (engineering value)
PRES: Design pressure P' (engineering value)
B1_: Bias temperature (engineering value)
B2_: Bias pressure (engineering value)
OUT_: Output (%)
Always input engineering values to the measured temperature (PVTEMP) and the measured pressure
(PVPRES).
Operation error
Error code Description
(SD0)
3400H An invalid operation (such as division by zero) is performed.
3402H Input data (IN, PVTEMP, PVPRES) or operation constant (TEMP, B1_, PRES, B2_) is a subnormal number or NaN (not a number).
3403H An overflow has occurred.
A1 A2
TEMP+B1_ PVPRES+B2_
PVTEMP+B1_ PRES+B2_
1.0
PVPRES+B2_
PRES+B2_
1.0
TEMP+B1_
PVTEMP+B1_
5.6 Temperature/Pressure Correction (M+P_TPC)
Output (OUT_)
OUT_ = IN  A1  A2
5 CORRECTION OPERATION
5
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