Automationdirect.com DirectLOGIC DL205 Series User Manual page 479

Chapter 5: Intelligent Box (IBox) Instructions
Math - Real (MATHR) (IB-541)
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Math - Real Format lets you enter complex
mathematical expressions like you would in
Visual Basic, Excel, or C++ to do complex
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calculations, nesting parentheses up to 4
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levels deep. In addition to + - * /, you can do
250-1
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Bit-wise And (&) Or (|) and Xor (^). The
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DL260 also supports several Real functions -
Arc Cosine (ACOSR), Arc Sine (ASINR),
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DS5 Used Arc Tangent (ATANR), Cosine (COSR),
N/A
HPP Convert Radians to Degrees (DEGR), Invert
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Bits (INV), Convert Degrees to Radians
(RADR), HEX to Seven Segment Display
(SEG), Sine (SINR), Square Root (SQRTR),
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and Tangent (TANR).
Example: ((V2000 + V2002) / (V2004 - R2.5)) * SINR(RADR(V3000 / R10.0))
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Every V-memory reference MUST be able to fit into a double-word Real formatted value.
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MATHR Parameters
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• Result (DWORD): specifies the location where the Real result of the mathematical expression will
be placed (result must fit into a double-word Real formatted location)
• Expression: specifies the mathematical expression to be executed and the result is stored in specified
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Result (DWORD) location. Each V-memory location used in the expression must be in Real
format.
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DWORD Result . . . . . . . . . . . . . . . . . . . . . . . . V
Expression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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MATHR Example
In the following example, the MATHR instruction is used to calculate the math expression
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which multiplies the REAL (floating point) value in V1200 by 10.5 then divides by 2.7 and
loads the resulting 32-bit value in V2000 and V2001 when C100 turns on.
A
B
C
D
5–262
DL205 User Manual, 4th Edition, Rev. B
Parameter DL205 Range
See DL205 V-memory map - Data Words
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