Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 1103)

L-force | PLC Designer
Programming Reference
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DMS 4.1 EN 03/2011 TD29 1101
Concerning the notation regard that for bit addresses the IEC addressing mode is
always word oriented, that means that the place before the dot corresponds to the
number of the word, the place behind names the number of the bit.
Abb. 542 Comparison of byte and word oriented addressing for the address sizes D,W, B and X:
n = number of the byte
Overlap of memory ranges in case of byte addressing mode, example:
D0 contains B0 - B3, W0 contains B0 and B1, W1 contains B1 and B2, W2 contains B2
and B3 -> In order to get around the overlap W1 resp. D1, D2, D3 must not be used for
addressing!
Note: Boolean values will be allocated bytewise, if no explicit single-bit address is
specified. Example: A change in the value of varbool1 AT %QW0 affects the range
from QX0.0 to QX0.7.
Note: Online Change might change the contents on addresses. Please notice this
when using pointers on addresses.