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Download Siemens HB 131. 10 B Technical data
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Which Operands are available to the User Program? 1.4 Which Operands are available to the User Program? 1 The CPU 928B provides the following operand areas for programming: • process image and I/Os • flags (F flags and S flags) • timers/counters • data blocks Process image of the inputs and outputs PII/PIQ Characteristics The user program can access the following data types in the process image extremely quickly: - single bits, - bytes, - words, - double words Size 128 bytes each for inputs and outputs I/O area (P area) Characteristics The user program can access the I/O modules directly via the S5 bus. The following data types are possible: - bytes, - words. Size 256 bytes each for inputs and outputs Extended I/O area (O area) Characteristics The user program can access the I/O modules directly via the S5 bus. The following data types are possible: - bytes, - words. Size 256 bytes each for inputs and outputs CPU 928B Programming Guide C79000-D8576-C898-01 1 - 13
