GE PACSystems RX7i

Chapter 4. Ladder Diagram (LD) Programming
170 PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual GFK-2950C
4.8.17 Size Of
Counts the number of bits used by the variable assigned to input
IN and writes the number of bits to output Q.
Mnemonics:
SIZE_OF
Operands
Parameter
Description
Allowed Operands
Optional
IN
The variable whose size in bits is
calculated.
Variable of any data type except BYTE
arrays in non-discrete memory and
double-segment structures.
No
Q
The number of bits used by the variable
assigned to input IN.
DINT or DWORD variable.
ST also supports INT and WORD variables.
No
Example
The single-segment structure named Var assigned to
input IN contains eight BOOL elements (8 × 1 = 8 bits)
and twelve WORD elements (12 × 16 = 192 bits).
SIZE_OF outputs the value 8 + 192 = 200 to the
variable R00001 assigned to output Q.