Specifications

Data Type Structure Section 5-4

d) Floating Point Number

The data are interpreted in the Siemens ﬂoating point format.

e) Binary Variables with a Length of 1, 2 or 4 Bytes

Data with a length of 2 bytes are interpreted in the PLC-conformal byte order for

words.

Data with a length of 4 bytes are interpreted in the PLC-conformal byte order for

long words.

5.4.1 Data Types

Direct accessing of the following data types is possible:

E input bits (bit access)

A output bits (bit access)

M ﬂag bits (bit access)

EB input bytes (byte access)

AB output bytes (byte access)

MB ﬂag bytes (byte access)

EW input word (word access)

AW output word (word access)

MW ﬂag word (word access)

ED input double word (double word access)

AD output double word (double word access)

MD ﬂag double word (double word access)

DW data word (word access)

DL data word, left-hand (high) (word access)

DR data word, right-hand (low) (word access)

DD data double word (double word access)

T timer (word access)

Z counter (word access)

The size of each data area is governed by the CPU of the PLC.