10 Floating point

CHKFLT/Single precision real number check command

CHKFLT(P)
Check whether the data specified in (s) is a real number and store the result in the start soft component specified in (d)
PLC Editor2 version that supports this command: 2.3.1 and above
-[CHKFLT (s) (d)]
Content, range and data type

Device used

Features

Check the data stored in (s) and determine whether it is a standard number, non-numeric, infinite, or non-standard number, corresponding to the states of (d), (d+1), (d+2), and (d+3).

Descriptions

Numbers expressed as floating point numbers

The following types of floating-point numbers are available

Standard figures
Standard numbers represent real numbers. The sign bit 0 for positive numbers and 1 for negative numbers.

Exponent (e) will be represented from 1 to 254, and the actual exponent will be less than 127, i.e. -126 to 127.

The mantissa (f) is expressed from 0 to 2²³-1, in the actual mantissa, the bit 2²³ is 1 and the binary decimal point follows it immediately.
Standard figures are shown as below:

For example:
sign: -

Index: 128-127=1

mantissa:

value:
Non-standard figures
A non-standard figure represents a real number with a very small absolute value. The sign bit is 0 for a positive number and 1 for a negative number.

The exponent (e) is 0 and the actual exponent is -126.

The mantissa (f) is represented from 0 to 2²³-1, in the actual mantissa, bit 2²³ is 0, and the binary decimal point immediately follows it.

Non-standard figure are shown as below:

For example:
sign：-

Index：-126

mantissa：

Value:
Zero
+0.0 and -0.0 values can be represented by setting signs, 0 for positive numbers and 1 for negative numbers. Both the exponent and the mantissa are 0. +0.0 and -0.0 are both equal to 0.0.
Infinity
+∞ and -∞ values can be represented by setting signs, 0 for positive numbers and 1 for negative numbers. The exponent is 255 (2⁸-1) and the mantissa is 0.
NaN
NaN (not a number) is generated when calculations such as 0.0/0.0, ∞/∞, or ∞-∞ result in a value other than a number or infinity. The exponent is 255 (28-1), and the mantissa is non-zero.

Error code

Example

M0 is ON, if D0 is a standard number (in the range of single-precision real numbers), then M100 is ON.

M2 is ON, if D4 is a non-numeric value (NAN), then M109 is ON.

M9 set ON, if infinity in D18, then M138 set ON.

M10 is set to ON, and if D20 is a non-standard number, M143 is set to ON.

DACOS/Single precision real number COS-1 operation

DACOS(P)

After calculating the COS ^-1 (arc cosine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DACOS (s) (d)]

Content, range and data type

Device used

Features

After calculating the COS ^-1 (arc cosine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

The COS value specified in (s) can be set within the range of -1.0 to 1.0.

The angle (calculation result) stored in (d) stores the value from 0 to π in radians.

Related device are as follows:

Error code

Example

Calculate the arc cosine value of 0.4 and the result is 1.159279.

DASIN/Single precision real number SIN^-1 operation

DASIN(P)

After calculating the SIN -1 (arc sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DASIN (s) (d)]

Content, range and data type

Device used

Features

• After calculating the SIN-1 (arc sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

The SIN^-1 value specified in (s) can be set within the range of -1.0 to 1.0.

The angle (calculation result) stored in (d) is stored in the unit of radians (-π/2) to (π/2).

• The related devices are as follows.

Error code

Example

Calculate the arc sine of 0.4 and the result is 0.4115168.

DATAN/Single precision real number TAN^-1 operation

DATAN(P)

After calculating the TAN -1 (arctangent) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DATAN (s) (d)]

Content, range and data type

Device use

Features

Calculate the TAN -1 ((arctangent) value of the angle specified in (s), and store the calculation result in the device number specified in (d).

The angle (calculation result) stored in (d) is stored in the unit of radians (-π/2) to (π/2).

• The related devices are as follows.

Error code

Example

Calculate the arctangent value of 4.6 and the result is 1.356736

DCOS/Single precision real number COS operation

DCOS (P)

After calculating the COS (cosine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DCOS (s) (d)]

Content, range and data type

Device used

Features

After calculating the COS (cosine) value of the angle specified in (s), store the calculation result in the device number specified in (d).

For the angle specified in (s), set it in radians (angle×π÷180).

• The related devices are as follows.

Error code

Example

Calculate the cosine value of 1.3 and the result is 2.674989E-1

DCOSH/Single precision real number COSH operation

DCOSH(P)

After calculating the DCOSH (hyperbolic cosine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DCOSH (s) (d)]

Content, range and data type

Device used

Features

• After calculating the DCOSH (hyperbolic cosine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

This instruction is to take the COSH value of a binary floating point number. The calculation formula is cosh value=(e s +e -s )/2.

• The related devices are as follows.

Error code

Example

Calculate the hyperbolic cosine value of 2.5, and the result is 6.132289

DSIN/Single precision real number SIN operation

DSIN(P)

After calculating the SIN (sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DSIN (s) (d)]

Content, range and data type

Device used

Features

After calculating the SIN (sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

For the angle specified in (s), set it in radians (angle×π÷180).

• The related devices are as follows.

Error code

Example

Calculate the sine of 1.4 and the result is 0.9854497

DSINH/Single precision real number SINH operation

DSINH(P)

After calculating the SINH (hyperbolic sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DSINH (s) (d)]

Content, range and data type

Device used

Features

After calculating the SINH (hyperbolic sine) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

The instruction is to take the SINH value from a binary floating point number. The calculation formula is sinh value = (e s -e -s )/2.

The related devices are shown below.

Error code

Example

Calculate the hyperbolic sine value of 3.2 and the result is 12.24588

DTAN/Single precision real number TAN operation

DTAN(P)

After calculating the TAN (tangent) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DTAN (s) (d)]

Content, range and data type

Device used

Features

After calculating the TAN (tangent) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

For the angle specified in (s), set it in radians (angle×π÷180).

The related devices are shown below.

Error code

Example

Calculate the tangent of 1.4 and the result is 5.797883

DATANH/Single precision real number TANH operation

DTANH(P)

After calculating the DTANH (hyperbolic tangent) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

-[DTANH (s) (d)]

Content, range and data type

Device used

Features

After calculating the DTANH (hyperbolic tangent) value of the angle specified in (s), the calculation result is stored in the device number specified in (d).

The instruction is to take the TANH value of a binary floating point number. The calculation formula is tanh value=(e ^s -e ^-s )/(e ^s +e ^-s ).

The related devices are shown below.

Error code

Example

Calculate the hyperbolic tangent of 2.5, and the result is 0.9866143

DDEG/Single precision real number radian → angle conversion

DDEG(P)

Convert the size unit of the angle from the radian unit specified in (s) to the degree unit (DEG. unit), and store it in the device number specified in (d).

-[DDEG (s) (d)]

Content, range and data type

Device used

Features

The angle size unit is converted from the radian unit specified in (s) to the degree unit (DEG. unit), and then stored in the device number specified in (d).

The conversion from degree unit to radian unit is performed as follows.

Radian unit = degree unit * 180/π

• The related devices are as follows.

Error code

Example

The result is 194.8057

DRAD/Single precision real number conversion angle → radian conversion

DRAD(P)

The angle size unit is converted from the degree unit (DEG. unit) specified in (s) to the radian unit and stored in the device number specified in (d).

-[DRAD (s) (d)]

Content, range and data type

Device used

Features

The angle size unit is converted from the degree unit (DEG. unit) specified in (s) to the radian unit and stored in the device number specified in (d).

Degree unit → radian unit

The conversion is performed as follows.

Radian unit = degree unit*π/180

• The related devices are as follows.

Error code

Example

The result is 1.047197

DEADD/Single precision real number addition operation

DEADD(P)

Add the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result in the device specified in (d).

-[DEADD (s1 ) (s2) (d)]

Content, range and data type

Device used

Features

Add the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result of the addition in the device specified in (d).

When constants (K, H) to (s1), (s2) are specified, the value is automatically converted to a binary floating point data.

• The related devices are as follows.

Error code

Example

The result is 1.2 + 63.2 = 64.4

DESUB/Single precision real number subtraction operation

DESUB(P)

Subtract the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result in the device specified in (d).

-[DESUB (s1) (s2) (d)]

Content, range and data type

Device used

Features

• Subtract the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the subtraction result in the device specified in (d).

When constants (K, H) to (s1), (s2) are specified, the value is automatically converted to a binary floating point data.

• The related devices are as follows.

Error code

Example

The calculation result is 1.2-63.2 = -62

DEMUL/Single precision real number multiplication operation

DEMUL(P)

Multiply the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result in the device specified in (d).

-[DEMUL (s1) (s2) (d)]

Content, range and data type

Device used

Features

Multiply the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the multiplication result in the device specified in (d).

When constants (K, H) to (s1), (s2) are specified, the value is automatically converted to a binary floating point data.

• The related devices are as follows.

Error code

Example

The calculated result: 1.2*63.2 = 75.84

DEDIV/Single precision real number division operation

DEDIV(P)

Divide the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result in the device specified in (d).

-[DEDIV (s1) (s2) (d)]

Content, range and data type

Device used

Features

Divide the binary floating point data specified in (s1) and the binary floating point data specified in (s2), and store the result of the division in the device specified in (d).

When constants (K, H) to (s1), (s2) are specified, the value is automatically converted to a binary floating point data.

• The related devices are as follows.

Error code

Example

Get the calculation result: 63.2 / 1.2 = 52.66666667

DEMOD/Single precision real number remainder operation

DEMOD(P)

Perform division operation on the single-precision real number specified in (s1) and the single-precision real number specified in (s2), and store the remainder operation result in the device specified in (d).
PLC Editor2 version that supports this instruction: 2.3.1 and above

-[DEMOD  (s1)  (s2)  (d)]

Content, range and data type

Device used

Features

Perform division operation on the single-precision real number specified in (s1) and the single-precision real number specified in (s2), and store the remainder operation result in the device specified in (d).

Error code

Example

M21 is set to ON, resulting in the calculation: 10 % 3 = 1.000000E+00

DEMOV/Single precision real data transmission

DEMOV(P)

Transfer the binary floating point data data stored in the device specified in (s) to the device specified in (d).

-[DEMOV (s) (d)]

Content, range and data type

Device used

Features

Transfer the binary floating point data data stored in the device specified in (s) to the device specified in (d).

Error code

Example

Assign 3.265 to R10

DEBCD/Binary floating point → decimal floating point conversion

DEBCD(P)

After converting the binary floating point specified in (s) into a decimal floating point, it is stored in the device specified in (d).

-[DEBCD (s) (d)]

Content, range and data type

Device used

Features

After converting the binary floating point specified in (s) into a decimal floating point, it is stored in the device specified in (d).

Error code

Example

Get the result: 5600 ×10 -5

DEBIN/Decimal floating point → binary floating point conversion

DEBIN(P)

Convert the decimal floating point specified in (s) to binary floating point and store it in the device specified in (d).

-[DEBIN (s) (d)]

Content, range and data type

Device used

Features

Convert the decimal floating point specified in (s) to binary floating point and store it in the device specified in (d).

• The related devices are as follows.

Error code

Example

The result after conversion:

DENEG/Single precision real number sign inversion

DENEG(P)

After inverting the sign of the single precision real number of the device specified in (d), it is stored in the device specified in (d).

-[DEBEG (d)]

Content, range and data type

Device used

Features

The sign of the binary floating point data of the device specified in (d) is inverted and stored in the device specified in (d).

Used when inverting positive and negative signs.

Error code

Example

It becomes -1.43 after conversion

DECMP/Single precision real number comparison

DECMP(P)

Compare two data (binary floating point data), and output their large, small, and consistent results to the bit device (3 points).

-[DECMP (s1) (s2) (d)]

Content, range and data type

Device used

Features

Compare the comparison value (s1) and the comparison source (s2) as a floating point comparison. According to the result of small, consistent, and large, one of (d), (d)+1, (d)+2 turns ON.

(1): Even if the command input is turned OFF and the DECMP command is not executed, (d) to (d)+2 will keep the state before X0 is turned OFF.

When the constant (K, H) to the device specified in (s1), (s2) is specified, the value BIN→binary floating point data conversion is processed automatically

✎Note: The device specified in (d) occupies 3 points [(d), (d)+1, (d)+2]. Please be careful not to overlap with devices used for other purposes.

Error code

Example

Since the floating point number in R30 is greater than the floating point number in D30, M12 turns ON.

DEZCP/Binary floating point bandwidth comparison

DEZCP(P)

Compare the comparison range and data (binary floating point) of high and low 2 points, and output the result of its large, small, and bandwidth to the bit device (3 points).

-[DEZCP (s1) (s2) (s3) (d)]

Content, range and data type

Device used

Features

Compare the comparison value (s1), (s2) and the comparison source (s3) as a floating point comparison, according to its small, range, and large result, one of (d), (d)+1, (d)+2 The bit turns ON.

(1): Even if the instruction input is turned OFF and DEZCP instruction is not executed, (d) to (d)+2 will keep the state before X0 is turned OFF.

When the constant (K, H) to the device specified in (s1), (s2), (s3) is specified, the value is automatically converted from BIN to binary floating point for processing.

Please set the size relationship of the comparison data as [(s1)+1,(s1)]≤[(s2)+1,(s2)]. In the case of [(s1)+1,(s1)]>[(s2)+1,(s2)], it is regarded as the value of [(s2)+1,(s2)] and [(s1)+1, (s1)] Same for comparison.

Error code

Example

Since 2.45 is greater than 1.456 and 2.45 is less than 2356, M41 is set to ON

DESQR/Single precision real square root

DESQR(P)

After the square root of the value specified in (s) is calculated, the calculation result is stored in the device specified in (d).

-[DESQR (s) (d)]

Content, range and data type

Device used

Features

• After the square root of the value specified in (s) is calculated, the calculation result is stored in the device number specified in (d).

The value specified in (s) can only be set to a positive number. (Cannot perform operations with negative numbers.)

• The related devices are as follows.

Error code

Example

Get the result: D0 is a floating point number 2

DESTR/Single precision real number → string conversion

DESTR(P)

Convert the binary floating point data data stored in the device specified in (s1) into a character string according to the display specification stored after the device number specified in (s2), and store it in the device number specified in (d) or later .

-[DESTR (s1) (s2) (d)]

Content, range and data type

Device used

Features

Convert the binary floating point data data stored in the device specified in (s1) into a character string according to the display specification stored after the device number specified in (s2), and store it in the device number specified in (d) after. You can also directly specify the real number to (s1).

• The converted data differs according to the display specification specified in (s2).

The range in the above table will change the value range according to the conversion form and other information used

Decimal form

If 0 is specified in (s2), it will be in decimal form.

Corresponding digit range in decimal form:

1.Example: The total number of digits is 8, the number of decimal places is 3, and when -1.235 is specified, (d) will be stored in the following way.

When displaying character strings, display character strings in normal order from left to right for convenience.

Converted string

The corresponding ASCII code is:

The first one is the sign bit. In the sign, when binary floating point data data is positive, 20H (blank) is stored, and when it is negative, 2DH(-) is stored.

If the actual number of digits is less than all digits during conversion, 20H (blank) will be added between the sign and the first number

If the decimal part of the binary floating point data data cannot be accommodated in the decimal part, the lower decimal part will be rounded off.

2. Example: The total number of digits is 8, the number of decimal places is 2, and when -1.234 is specified, (d) will be stored in the following way.

The converted string:

The corresponding ASCII code is:

In the above example: the low byte of D20 stores the negative sign 2DH(-). Then due to insufficient number of digits, the high byte of D20 and D21 are both 20H (blank). Finally, D22 to D23 store numeric characters 1.23

Exponential form

When 1 is specified in (s2), it will be in exponential format.

The corresponding digit range in exponential form:

For example 3, all digits are 12, decimal place is 4, and 1234.5 is specified, (d) and later will be stored as follows.

The converted string:

The corresponding ASCII code is:

In the sign of the integer part, when the binary floating point data data is positive, 20H (blank) is stored, and when it is negative, 2DH(-) is stored.

The integer part is fixed to 1 digit. 20H (blank) is stored between the integer part and the Sign.

If the decimal part of the binary floating point data data cannot be accommodated in the decimal part, the lower decimal part will be rounded off.

When the number of decimal places is set to other than 0, 2EH(.) is automatically stored in the number of specified decimal places+1 digit. When the decimal place is 0, 2EH(.) is not stored.

In the sign of the exponent, 2BH(+) is stored when the exponent is positive, and 2DH(-) is stored when it is negative.

The exponent is fixed to 2 digits. When the exponent part is a 1-digit number, 30H(0) is stored between the signs of the exponent part.

00H is automatically stored at the end of the converted character string.

Example 4: All digits are 12, decimal places are 3, and -16346 is specified, (d) will be stored in the following way.

The converted string:

The corresponding ASCII code is:

As in the above example:

The low byte of D20 stores the negative sign 2DH(-).

Then due to insufficient number of digits, the high byte of D20 and the low bit of D21 are both 20H (blank).

16346 becomes the string 1.635E+04, in which the last digit "6" of 16346 is rounded.

The exponent part is 34H(4) with only one bit, then add 30H(0) between the Signs 2DH(-) and 34H(4).

Finally D26 automatically stores 00H

Example 5: All digits are 12, and the number of decimal places is 0. If -16346 is specified, (d) will be stored as follows.

The converted string:

The corresponding ASCII code is:

This example mainly shows that if the decimal place is set to 0, the decimal point 2EH(.) will be automatically omitted.

Error code

DEVAL/String → single precision real number conversion

DEVAL(P)

The character string stored in the device number specified in (s) and later is converted to a binary floating point data, and then stored in the device specified in (d).

-[DEVAL (s) (d)]

Content, range and data type

Device used

Features

The character string stored in the device number specified in (s) and later is converted to a binary floating point data, and then stored in the device specified in (d).

Whether the specified string is in decimal form or exponential form, it can be converted to a binary floating point data.

Up to 24 characters can be set for the string. 20H (blank) and 30H (0) in the character string are also counted as 1 character.

Decimal form

When the character string specified in (s) is in decimal format, the following is the case.

In the character string specified in (s), for the character string to be converted to a binary floating point data, the 6 digits after the sign, decimal point, and exponent are valid, and the 7th digit and later will be discarded during conversion.

When the sign is specified as 2BH(+) or omitted in the decimal point format, it will be converted as a positive value. In addition, when the sign is specified as 2DH(-), it will be converted as a negative value.

If there are 20H (blank) or 30H (0) in the character string specified in (s) other than the first 0, 20H and 30H will be ignored during conversion.

In the case of exponential form

When the character string specified in (s) is in exponential form, it is executed as follows.

Among the character strings specified in (s), for the character string to be converted to a binary floating point data, the 6 digits after the sign, decimal point, and exponent are valid, and the 7th digit and later will be discarded during conversion.

If the sign of the exponent part is specified as 2BH(+) or omitted in the exponential form, it will be converted as a positive value. When the sign of the exponent is specified as 2DH(-), it will be converted as a negative value.

If there is 20H (blank) or 30H (0) in the character string specified in (s) other than the first 0, 20H and 30H will be ignored during conversion.

In the exponential character string, if 30H (0) is stored between "E" and the value, 30H will be ignored during conversion.

The related devices are shown below.

Error code

Example

The stored character string of D0 is: 5.2467E+12

The resulting floating point number is: 5.2467E+12

DEXP/Single precision real number exponential operation

DEXP(P)

After performing the exponential calculation of the value specified in (s), the calculation result is stored in the device specified in (d).

-[DEXP (s) (d)]

Content, range and data type

Device used

Features

After performing the exponential calculation of the value specified in (s), the calculation result is stored in the device number specified in (d).

In exponential calculation, the base (e) is calculated as "2.71828".

The related devices are shown below.

Error code

Example

Calculate the result:

INT/Single precision real number → signed BIN 16-bit data

INT(P)

Convert the specified single precision real number into signed BIN 16-bit data.

-[INT (s) (d)]

Content, range and data type

Device used

Features

• Convert the single precision real number specified in (s) into signed BIN 16-bit data and store it in the device specified in (d).

• The converted data will be rounded to the first digit below the decimal point of the single precision real number specified in (s).

• When setting the input value with the engineering tool, rounding errors may occur.

• The related devices are as follows.

Error code

Get the conversion result:

And the borrow means turn ON

DINT/Single precision real number→ signed BIN 32-bit data

DINT(P)

Convert the specified single precision real number into signed BIN 32-bit data.

-[DINT (s) (d)]

Content, range and data type

Device used

Features

• Convert the binary floating point data specified in (s) into signed BIN 32-bit data and store it in the device specified in (d).

• The converted data will be rounded to the first digit below the decimal point of the binary floating point data specified in (s).

• When setting the input value with the engineering tool, rounding errors may occur.

• The related devices are as follows.

Error code

Example

Get the conversion result:

And the borrow means turn ON

DLOG10/Single precision real number common logarithmic operation

DLOG10(P)

Calculate the common logarithm (base 10 logarithm) of the value specified in (s), and store the result of the operation in the device specified in (d).

-[DLOG10 (s) (d)]

Content, range and data type

Device used

Features

Calculate the common logarithm (base 10 logarithm) of the value specified in (s), and store the result of the calculation in the device number specified in (d).

The value specified in (s) can only be set to a positive number. (Cannot perform operations with negative numbers.)

• The related devices are as follows.

Error code

Example

Get calculation results

DLOGE/Single precision real number natural logarithm operation

DLOGE(P)

After calculating the logarithm when the natural logarithm e of the value specified in (s) is the base, store the calculation result in the device specified in (d).

-[DLOGE (s) (d)]

Content, range and data type

Device used

Features

• After calculating the logarithm when the natural logarithm e of the value specified in (s) is the base, store the result of the calculation in the device number specified in (d).

• The value specified in (s) can only be set to a positive number. (Cannot perform operations with negative numbers.)

• The related devices are as follows.

Error code

Example

The result is as below: