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> Programmable Controllers > BRX PLCs (Stackable Micro Brick)

In Depth

Do-more^® Designer Software: Powerful, Intuitive math

$Do-more Math Instruction$

The Spreadsheet style MATH instruction allows mixing of data types* and it accepts formulas and variables. The MATH instruction also allows nesting with parentheses to 8 levels, plus:

Ten 'Real' Functions, including Natural Log, Log, e, PI, Square Root, and conversions
All the standard Trig Functions
Eight Statistical Functions, including Average, Min & Max, RANDINT and RANDREAL (to generate random values), Standard Deviation functions and more
Thirteen Conditional functions, including six CountIF, six SumIF, and If/Else expressions with a full complement of binary operators

If that's not enough, how about absolute value, time, memory, and indirect addressing? You even get access to system-level bits such as $IndexError, $OutOfRange, $Overflow, etc. And with the in-line math feature you can incorporate your math equations inside compare instructions for even more code flexibility!

* Note about data types: integer and real types are really all you need but Do-more does include a few BCD and octal conversion instructions for legacy data types.

Do-more Math Instruction (below) used to evaluate the volume of liquid in a vertical cylindrical tank:

Here is a list of ALL the operators and functions that can be used in the Math Instruction (from the Help file):

Binary Operators	Description	Example
+	Add	D0 + D1
-	Subtract	D0 - D1
*	Multiply	D0 * D1
/	Divide	D0 / D1
%	Modulus/Remainder	D0 % D1
**	Raise to a Power	D0 ** D1
<	Less Than	D0 < D1
<=	Less Than or Equal To	D0 <= D1
==	Equal To	D0 == D1
!=	Not Equal To	D0 != D1
>=	Greater Than or Equal To	D0 >= D1
>	Greater Than	D0 > D1
&&	Logical AND	X0 && X1
\|\|	Logical OR	X0 \|\| X1
&	Bit-wise AND	D0 & 0x7FFF
\|	Bit-wise OR	D0 \| 0xFFFF
^	Bit-wise XOR	D0 ^ D1
<<	Shift Left	D0 << 1
>>	Shift Right	D0 >> 1
>>>	Unsigned Shift Right	D0 >>> 1

Unary Operators	Description	Example
-	Negate	-D0
~	Bit-wise Invert	~D0
!	Logical Not	!X0

Common Functions	Description	Example
ABS	Absolute Value	ABS(D0)
MAX	Maximum Between Two Expressions	MAX(D0 * D1, V2)
MIN	Minimum Between Two Expressions	MIN(D0 * D1, V2)

REAL Functions	Description	Example
E	Euler's Constant e	E()
FRAC	Fractional Portion of a Real Number	FRAC(R0)
LN	Natural Log	LN(R0)
LOG	Log Base 10	LOG(R0)
PI	Returns the value of PI (3.14159)	PI()
ROUND	Round Real to Nearest Whole Number	ROUND(R0)
SQRT	Square Root	SQRT(R0)
TOINT	Convert to Integer	TOINT(SQRT(R0))
TOREAL	Convert to Real	TOREAL(D0 + D1)
TRUNC	Truncate Real to a Whole Number	TRUNC(R0)

Trigonometric Functions	Description	Example
ACOS	Arccosine in Radians	ACOS(R0)
ASIN	Arcsine in Radians	ASIN(R0)
ATAN	Arctangent in Radians	ATAN(D0)
COS	Cosine of Radian Angle	COS(R0)
DEG	Convert Radians to Degrees	DEG(R0)
RAD	Convert Degrees to Radians	RAD(R0)
SIN	Sine of Radian Angle	SIN(R0)
TAN	Tangent of Radian Angle	TAN(R0)

Statistical Functions	Description	Example
AVGR	Average of a Range of Values	AVGR(D0,10)
MAXR	Maximum Value Across a Range of Values	MAXR(D0,10)
MINR	Minimum Values Across a Range of Values	MINR(D0, 10)
RANDINT	Get Random Integer in Range 0 ... 2147483647	RANDINT()
RANDREAL	Get Random Real in Range 0.0 ... 1.0	RANDREAL()
STDEVPR	Population Standard Deviation of a Range	STDEVPR(R20, 8)
STDEVR	Sample Standard Deviation of a Range	STDEVR(R20, 8)
SUMR	Sum of a Range of Values	SUMR(D0,10)

Conditional Functions	Description	Example
COUNTIFEQ	Count If Equal to Expression	COUNTIFEQ(42, D0, 10)
COUNTIFNE	Count If Not Equal to Expression	COUNTIFNE(42, D0, 10)
COUNTIFGE	Count If Greater Than or Equal to Expression	COUNTIFGE(42, D0, 10)
COUNTIFGT	Count If Greater Than Expression	COUNTIFGT(42, D0, 10)
COUNTIFLE	Count If Less Than or Equal to Expression	COUNTIFLE(42, D0, 10)
COUNTIFLT	Count If Less Than Expression	COUNTIFLT(42, D0, 10)
IF	If / Else Expression	IF(C7, D0, D1)
SUMIFEQ	Sum if Equal to Expression	SUMIFEQ(42, D0, 10)
SUMIFNE	Sum if Not Equal to Expression	SUMIFNE(42, D0, 10)
SUMIFGE	Sum If Greater Than or Equal to Expression	SUMIFGE(42, D0, 10)
SUMIFGT	Sum if Greater Than Expression	SUMIFGT(42, D0, 10)
SUMIFLE	Sum if Less Than or Equal to Expression	SUMIFLE(42, D0, 10)
SUMIFLT	Sum if Less Than Expression	SUMIFLT(42, D0, 10)

Time Functions	Description	Example
NOW	Get Date/Time Stamp as a 32-bit Integer (1970 Epoch)	NOW()
TICKms	Get Millisecond System Timer Value	TICKms()
TICKus	Get Microsecond System Timer Value	TICKus()

Memory Functions	Description	Example
REF	Read Value Indirectly	REF(D0, V0)
[ ]	Array Index Expression	D[ (V10 * 16) + V11 ]

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Do-more^® Designer Software: Powerful, Intuitive math