Related Manuals for Siemens CPU 416
Summarization of Contents
Abbreviations and Mnemonics
Abbreviations and Mnemonics, continued
Definitions and examples of abbreviations and mnemonics used in the manual.
Registers
ACCU1 to ACCU4 (32 Bits)
Accumulators for processing bytes, words, or double words. Result in ACCU1.
Address Registers AR1 and AR2 (32 Bits)
Contain area-internal or area-crossing pointers for indirect addressing.
Status Word (16 Bits)
Bits evaluated or set by instructions, 16 bits long.
Examples of Addressing
Immediate Addressing
Loading constants or addresses directly into ACCU1.
Direct Addressing
Using direct memory addresses for input/output operations.
Indirect Addressing of Timers/Counters
Addressing timers/counters using indirect methods.
Area-Internal Memory-Indirect Addressing
Addressing via pointers stored in local data memory.
Examples of Addressing, continued
Area-Internal Register-Indirect Addressing
Addressing using pointers within address registers.
Area-Crossing Register-Indirect Addressing
Addressing across register areas using area identifiers.
Addressing Via Parameters
Addressing using parameters passed to blocks.
Execution Times with Indirect Addressing
Calculating the Execution Time
Formula for calculating total execution time from two parts.
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