CSE-Semaphore TWinSoft Manual - ioSelect

10.7. Mathematical Block
A mathematical Block allows to carry out analog output operations like addition, subtraction,
multiplication, division, bit manipulation, indirect addressing...
To insert a Math block, in the edit mode of Ladder Programming, click the icon of the LD
Toolbar.
Introduction
There are 8 categories of mathematical functions available (to use in math blocks):
• Assignment functions.
• Arithmetic operations.
• Comparisons.
• Bit manipulations.
• Boolean operations.
• Conversion (PID, BCD, etc.), and indirect addressing.
• Text and miscellaneous functions.
• Floating point.
In the functions, the Arguments to replace by Tags (or constant) are represented as follows:
- A, B, C, and D: Analog Tags.
- Ptr: Pointer in indirect addressing; analog Tag.
- BOOL, Bit: Digital Tag.
- Tot1, Tot2: Analog double word.
- Flt: Floating point
The equality operations are always executed from the right to the left. In other words, we have:
result = operation
or: output = input (means the value of Input variable is copied in the Output
variable).
16 bit analog numbers on are always worked out as signed values in TBox, even if they have
been defined as 'Unsigned' Tags.
If used in 'Indirect addressing' functions, an analog variable of the pointer is considered as
'Unsigned', even if it appears 'Signed'.
In edit mode, to insert a 'Math function' between 2 functions in a Math block, place the
cursor at the position you want to insert the function, and press the key 'Insert' of keyboard.
Assignments
A = B 'A' contains a copy of the value of 'B'
A = -B 'A' contains the invert value of 'B'
A = Low(B) 'A' contains a copy of the 8 lowest bits of 'B'
A = High(B) 'A' contains a copy of the 8 highest bits of 'B'
A = Abs (B) 'A' contains a copy of the absolute value of 'B'
A = Swap(B) 'A' contains the inversion of the 8 highest bits and the 8 lowest bits of 'B'
inc (A) increase the value of Tag 'A' by 1 bit
dec (A) decrease the value of Tag 'A' by 1 bit
TWinSoft: 8.32 – Getting Started 36