Spirit flow-x, Справочник по функциям

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Flow-X─ Function Reference
Flow-X IO Functions - fxRTDInput
Function outputs Remark EU SW tag Alarm Fallback
Status Status output
0: Normal
1: Input argument out of range
2: Under range failure
3: Over range failure
4: Open circuit
5: Short circuit STS
FIOOR
(*)
(*)
(*)
(*)
Value Temperature in degrees Celsius °C VAL 0
(*) Note that no alarm is generated for this status output value. This is to avoid an unnecessary alarm in
case the input is not used
fxRTDInput
Reads the PT100 input as a ‘raw’ Ohm number. Use fxPT100Table to convert to degrees Celsius.
Function inputs Remark EU Default
Name Optional tag name, tag description and tag
group
Channel number 1..2
Function outputs Remark EU SW tag Alarm Fallback
Status Status output
0: Normal
1: Input argument out of range
2: Under range failure
3: Over range failure
4: Open circuit
5: Short circuit STS
FIOOR
(*)
(*)
(*)
(*)
Value Ohm 0
fxPT100Table
This function converts a resistance value (Ohm) into a temperature value (°C) according to the Pt-100
conversion tables. A Pt-100 sensor is a Platinum Resistance Thermometer (PRT) element with a
resistance of 100 Ω at 0°C. 'Pt' is the symbol for platinum.
Resistance thermometers as such are also referred to as Resistance Temperature Detectors (RTD).
The resistance changes linearly with temperature. For Pt-100 elements the linearity coefficient is 0.385
Ohm/°C for European elements and 0.392 Ohm/°C for American elements
For each sample the temperature value is obtained from the measured Ohms by means of the standard
RTD quadratic equation.
The input signal is considered to be faulty when the input circuitry has an open or a short circuit or
when the measured value is outside its range (as defined in table below).
Function inputs Remark EU Default
Name Optional tag name, tag description and tag
group
Ohm Measured temperature in Ohms Ohm
Input Type 1: European, 0.00385 Ω/ Ω /°C
As per DIN 43760, BS1905,IEC751
Range - 200..+850 °C
2: American, 0.00392 Ω/ Ω /°C
Range - 100..+457 °C
1
Function outputs Remark EU SW tag Alarm Fallback
Value °C 0