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  • Expressions

    Expresiile sunt folosite în Smart Rules „Ecuație” și „Formula”. Funcțiile suplimentare pot fi utilizate pe dispozitivele Modbus pentru a citi / scrie valori din / către registrele Modbus.

    Expresii matematice

    +, -, *, /

    (20.5 + 9.5) / 2    (15)

    Expresii logice

    AND, OR, !, =, !=, >, <

    (!IsRaining OR (Wind>30))
    MultiValueSwitchState != 2 (Not equal to 2)

    Funcții

    IF

    IF(logical_expression, value_if_true, value_if_false)

    Returnează o valoare dacă o expresie logică este „ADEVĂRATĂ” și alta dacă este „FALS”.

    LINEAR

    Returnează valoarea ajustată liniar - interpolare liniară.

    LINEAR(input, value1_input, value1_output, value2_input, value2_output)

    Example 1: LINEAR(250,  0,0,  50,500)   (Result is 25°C)
    
    Example 2: LINEAR(Co2,  400,0,  1200,1)
              (If value from Co2 sensor is 400ppm, output for air recovery will be 0%. 
               If Co2 is 1200, output will be 100%. And if e.g. Co2=800, output will be 50%)

    LINEAR (BOUNDS)

    An extension of the LINEAR function. It linearly interpolates an input value. If the input value is outside the defined range output value will be one of the extrema (minimum or maximum).

    LINEAR(input, value1_input, value1_output, value2_input, value2_output, BOUNDS)

    Examples:

    • LINEAR(110, 100, 0, 0, 1, BOUNDS) → 0.0

    • LINEAR(110, 0, 0, 100, 1, BOUNDS) → 1.0

    LINEAR (STRICT)

    An extension of the LINEAR function. It linearly interpolates an input value. The input value must be within the defined range. If the input value is outside the defined range output value will be NaN (not a number) value.

    LINEAR(input, value1_input, value1_output, value2_input, value2_output, STRICT)

    Examples:

    • LINEAR(110, 100, 0, 0, 1, STRICT) → NaN

    • LINEAR(110, 0, 0, 100, 1, STRICT) → NaN

    SWITCH

    SWITCH(expression, case1, value1, [case2, ...], [value2, ...], default_value)

    Testează o expresie împotriva unei liste de cazuri și returnează valoarea corespunzătoare a primului caz de potrivire, cu o valoare implicită dacă nu se mai întâlnește nimic.

    Example


    Configuration

    ReadState ... SWITCH(MODBUSR(H, 168, UInt16),   0, 0,   0x02, 1,   0x04, 2,   0x08, 3,   0x10, 4,   0x40, 5, 0x800, 6,   0)
    WriteState ... MODBUSWNE(H, 168, UInt16, SWITCH(Mu,   0, 0,   1, 0x02,   2, 0x04,   3, 0x08,   4, 0x10,  5, 0x40,   6, 0x800,  0)

    Result

    MIN

    MIN(value1, value2)

    Returnează cea mai mică dintre cele două valori.

    MAX

    MAX(value1, value)

    Returnează cea mai mare dintre cele două valori.

    ROUND

    ROUND(value1)    

    Returnează valoarea rotunjită.

    Example 1: ROUND(2.01) (Result is 2)

    Example 2: ROUND(2.49) (Result is 2)

    Example 3: ROUND(2.5) (Result is 3)

    Example 4: ROUND(2.99) (Result is 3)

    Core 2018.1.9623

    DEWPOINT

    DEWPOINT(temperature, relativeHumidity)
    

    Returnează temperatura punctului de rouă, având în vedere temperatura actuală și umiditatea relativă. Punctul de rouă este calculat conform acestei ecuații: http: //bmcnoldy.rsmas.miami.edu/Humidity.html.

    Example 1: DEWPOINT(20, 50) (Result is ~9.26)

    Example 2: DEWPOINT(0, 100) (Result is 0)

    Core 2018.1.9623

    POWER

    Core 2021.1

    The POWER function calculates a given number, raised to a supplied power.

    POWER(number, power)

    Examples:

    • POWER(2,3) … 2^3 = 8

    • POWER(10, -3) … 0,001

    • POWER(25, 0) … 1

    MOD

    Core 2021.1

    The MOD function returns the remainder of a division between two supplied numbers.

    MOD(number, divisor)

    Arguments:

    • number - The number to be divided.

    • divisor - The value that the number argument is divided by.

    Examples:

    • MOD(6, 4)  … 2

    • MOD(6, 2.5) … 1

    CEIL

    Core 2021.1

    The CEIL function rounds a supplied number away from zero, to the nearest multiple of a given number.

    CEIL(number, significance)

    Arguments:

    • number   - The number that is to be rounded.

    • significance (optional) - The multiple of significance that the supplied number should be rounded to. If the significance is not specified, then it is equal to 1.
      (This should generally have the same arithmetic sign (positive or negative) as the supplied number argument)

    Examples:

    • CEIL(22.25,0.1) … 22.3

    • CEIL(22.25,1) … 23

    • CEIL(22.25) … 23

    • CEIL(-22.25,-1) … -23

    • CEIL(-22.25,1) … -22

    • CEIL(-22.25) … -22

    • CEIL(-22.25,-5) … -25

    FLOOR

    Core 2021.1

    The FLOOR function rounds a supplied number towards zero to the nearest multiple of a specified significance.

    FLOOR(number, significance)

    Arguments:

    • number - The number that is to be rounded.

    • significance (optional) -The multiple of significance that the supplied number is to be rounded to. If the significance is not specified, then it is equal to 1.
      (This should generally have the same arithmetic sign (positive or negative) as the supplied number argument)

    Examples:

    • FLOOR(22.25,0.1)… 22.2

    • FLOOR(22.25,1) … 22

    • FLOOR(22.25) … 22

    • FLOOR(-22.25,-1) … -22

    • FLOOR(-22.25,1) … -23

    • FLOOR(-22.25) … -23

    • FLOOR(-22.25,-5) … -20

    RAND

    Core 2021.1

    The Rand function generates a random real number between 0 and 1.

    RAND()

    Examples:

    • RAND()

    RANDINT

    Core 2021.1

    The RANDINT function generates a random integer between two supplied integers.

    RANDINT(bottom, top)

    Examples:

    • RANDINT(1,5)

    • RANDINT(-2,2)

    SIGN

    Core 2021.1

    The SIGN function returns the arithmetic sign (+1, -1 or 0) of a supplied number. I.e. if the number is positive, the SIGN function returns +1, if the number is negative, the function returns -1 and if the number is 0 (zero), the function returns 0.

    SIGN(number)

    Examples:

    • SIGN(100) … 1

    • SIGN(0) … 0

    • SIGN(-100) … -1

    SQRT

    Core 2021.1

    The SQRT function calculates the positive square root of a supplied number.

    SQRT(number)

    Examples:

    • SQRT(25) … 5

    LOG

    Core 2021.1

    The LOG function calculates the logarithm of a given number, to a supplied base.

    LOG(number, base)

    Arguments:

    • number - The positive real number that you want to calculate the logarithm of.

    • base (optional) - An optional argument that specifies the base to which the logarithm should be calculated.
      If the argument is not specified, then the base argument uses the default value 10.

    Examples:

    • LOG(4,0.5) … -2

    • LOG(100) … 2

    LN

    Core 2021.1

    The LN function calculates the natural logarithm of a given number.

    LN(number)

    where the number argument is the positive real number that you want to calculate the natural logarithm of.

    Examples:

    • LN(100) … 4,60517

    Operații bit

    GETBIT

    Returns a value of a bit in the specified position.

    GETBIT(number, bit_position)

    Arguments:

    • number - number to extract value of specific bit from

    • bit_position - position of bit, starting with 0, from right

    Examples:

    • GETBIT(2, 0) → first bit of number 2 (0b0010) is 0

    • GETBIT(4,2) → third bit of number 4 (0b0100) is 1

    GETBITS

    Returns value of specified number of bits in the specified position.

    GETBITS(number, start_bit, number_of_bits)

    Examples:

    • GETBITS(216, 3, 2) → number 216 = 0b1101 1000; value of 4th bit from the right is 1, 5th bit is 1, therefore result is 0b0011 = 3

    • GETBITS(0xFF, 0, 4) → number 0xFF = 255 = 0b1111 1111; value of first 4 bits from right is 0b1111 = 0xF = 15

    GETBYTE

    Returns a value of a byte in the specified number.

    GETBYTE(number, byte_position)

    Arguments:

    • number - number to extract value of specific byte from

    • byte_position - position of byte, starting from 0, from right

    Examples:

    • GETBYTE(256, 0) → 0001 0000 0000 → 0

    • GETBYTE(256, 1) → 0001 0000 0000 → 1

    • GETBYTE(259, 0) → 0001 0000 0011 → 3

    SETBYTE

    Assigns a new value to the specified byte in the provided number and returns a new number.

    SETBYTE( number, byte_position, new_value)

    Examples:

    • SETBYTE(1, 0, 0) → 0

    • SETBYTE(256, 0, 255) → 511

    • SETBYTE(256, 1, 1) → 256

    • SETBYTE(259, 1, 2) → 515

    SETBIT

    Assigns a new value to the specified bit in the provided number and returns a new number.

    SETBIT(number, bit_position, new_value)

    Arguments:

    • number - number to be modified

    • bit_position - position of bit, starting with 0, from right

    • new_value - 0 or 1 - value that is going to be set to specified bit

    Examples:

    • SETBIT(1, 1, 1) → 3

    • SETBIT(3, 1, 1) → 3

    • SETBIT(4, 2, 0) → 4

    • SETBIT(12, 1, 0) → 14

    SETBITS

    Assigns a new value to the specified bits in the provided number and returns a new number.

    SETBITS(number, start_bit, number_of_bits, new_value)

    Examples:

    • SETBITS(192, 4, 2, 3) → 240

    • SETBITS(192, 5, 2, 3) → 224

    <<   (LEFT BIT SHIFT)

    8 << 2   (32)

    Excel: BITLSHIFT(number, shift_amount)

    >> (RIGHT BIT SHIFT)

    32 >> 2   (8)

    Excel: BITRSHIFT(number, shift_amount)

    & (BITWISE AND)

    3 & 1   (1)

    Excel: BITAND(number1, number2)

    | (BITWISE OR)

    2 | 1 (3)

    Excel: BITOR(number1, number2)

    Numere hexazecimale

    Expresiile pot interpreta, de asemenea, numere hexazecimale. Prefixul 0x este necesar, iar restul nu este sensibil la majuscule.

    0x0A (10)

    0xA0A0   (41120)
    0xa0a0   (41120)

    Modbus

    Urmați acest link pentru a găsi mai multe informații despre configurația Modbus.