S7-200 memory: bits to REALs
Click bits and read them as VB, VW, VD and REAL, big-endian.
VB0= 0 (16#00)
VB1= 0 (16#00)
VB2= 18 (16#12)
VB3= 52 (16#34)
VW0 = 0 (16#0000)VW2 = 4660 (16#1234)VD0 = 4660 (16#00001234) · REAL 6.530051e-42
The same four bytes read four ways. VW0 is VB0 (high byte) followed by VB1 (low byte): the S7-200 stores numbers big-endian. VW1 would overlap VW0 and VW2, so use even addresses for words and multiples of 4 for double words. A REAL uses the same 32 bits as VD0 in IEEE 754 format.