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Siemens TCP/IP Ethernet Driver Help

This parameter specifies the number of the rack in which the CPU of interest resides. For information on how to

read/write the rack number using an internal tag, refer to Internal Tags.

CPU Slot

This parameter specifies the number of the slot in which the CPU of interest resides. For information on how to

read/write the slot number using an internal tag, refer to Internal Tags.

Addressing Options

This dialog is used to set the byte order for 16-bit and 32-bit values. Options include Big Endian (S7 Default)

or Little Endian.

Note:

Big Endian uses bytes ordered from highest to lowest. Little Endian uses bytes ordered from lowest to highest.

The bit order is never changed with either of these methods.

Big Endian

DWord 1

Word 1 Word 3

7 6 5 4 3 2 1 0 1-

9 8

Byte 1 Byte 2 Byte 3 Byte 4

7 6 5 4 3 2 -

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Bits

1. The bit range for DWord 1 is 31-0.

2. The bit range for Word 1 and Word 3 is 15-0.

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Siemens IP-Module Especificaciones Pagina 9