Siemens SIMATIC TI505 Especificaciones descargar pdf (Pagina 5)

Simatic/TI 505 Serial Driver Help

Memory types that allow bit within Word (for example, V) can be referenced as a Boolean. The addressing

notation for doing this is as follows:

where <bit> represents the bit number within the Word or DWord, depending on the memory type. 0/1-Based

Bit Addressing provides two ways of addressing a bit within the given Word or DWord: 0-Based and 1-Based. 0-

Based addressing simply means the "first bit" begins at 0. With 1-Based, the first bit begins at 1. The bit order

for the Word or DWord is irrelevant with this option. In other words, it doesn't matter whether the first bit is the

Most Significant Bit or the Least Significant Bit.

Note: In this driver, the first bit will either be bit 0 or bit 1 depending on this 0/1-Based Bit Addressing setting.

0-Based (Default Setting)

Data Type Bit Range

Word Bits 0 – 15

DWord Bits 0 – 31

1-Based

Data Type Bit Range

Word Bits 1 – 16

DWord Bits 1 – 32

Note: 0/1-Based Bit Addressing does not apply to non-bit addresses such as Word addresses in V memory.

These addresses are always 1-Based and are not configurable.

Bit Order for V, K, STW

This option is used to select the order in which bits will be presented to V, K, and STW memory types when bit-

accessed.

Note: For the following example, the 1st through 16th bit signifies either 0-15 bits or 1-16 bits depending on if

the driver is set at 0-Based Bit Addressing or 1-Based.

DWord follows the same bit order logic as Words except instead of 16 bits, there are 32 bits.

Bit 0 Is MSB of Word

MSB LSB

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Bit 1 Is LSB (Default Setting) of Word

MSB LSB

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

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Siemens SIMATIC TI505 Especificaciones Pagina 5