AB Rockwell 1746-ib16 full series accessories

AB Rockwell 1746-ib16 full series accessories

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which store multiple-byte values in memory 1746-ib16 with the most significant byte at the lowest byte address. This byte-ordering scheme became known as “Big Endian” ordering. On the other hand, Intel’s 80X86 microprocessors, store multiple-byte values in memory with the least significant byte in the lowest byte address, earning the name “Little Endian” ordering. The VMIVME1746-ib16 bus interface uses an Intel based or equivalent bridge chip, which uses Little Endian byte ordering. Byte arrangement and the byte relationship between data in the processor and transferred data in memory are shown in Figure 1-2.Note that in 1746-ib16 Little Endian devices, the Memory’s least significant byte is stored in the lowest byte address after a multiple-byte write (such as the Lword transfer illustrated), while the Reflective Memory’s most significant byte is stored in the highest byte address after such transfers. Conversely, the processor considers data retrieved from the lowest byte address to be the least significant byte after a 1746-ib16 multiple-byte read. Data retrieved from the highest byte address is considered to be the most significant byte. Contrast the behavior of the Little Endian Pentium in Figure 1-2 with the same Lword transfer using a Big Endian processor like the Motorola 68040 in Figure 1-3 on page1746-ib16. Note that the Big Endian 68040 handles the same Lword transfer in a completely different manner than the Little Endian Pentium microprocessor. During a multiple-byte transfer like the Lword transfer illustrated

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Focus on DCS, PLC, robot control system and large servo system.

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