Siemens SIMATIC S7-200 - S7-200 Quick Reference Information; Special Memory Bits

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S7-200 Programmable Controller System Manual
A5E00066097-02
S7-200 Quick Reference Information
This appendix contains information about the following:
• Special Memory Bits
• Descriptions of Interrupt Events
• Summary of S7-200 CPU Memory Ranges and Features
• High-Speed Counters HSC0, HSC1, HSC2, HSC3, HSC4, HSC5
• S7-200 Instructions
Table G-1 Special Memory Bits
Special Memory Bits
SM0.0 Always On SM1.0 Result of operation = 0
SM0.1 First Scan SM1.1 Overflow or illegal value
SM0.2 Retentive data lost SM1.2 Negative result
SM0.3 Power up SM1.3 Division by 0
SM0.4 30 s off / 30 s on SM1.4 Table full
SM0.5 0.5 s off / 0.5 s on SM1.5 Table empty
SM0.6 Off 1 scan / on 1 scan SM1.6 BCD to binary conversion error
SM0.7 Switch in RUN position SM1.7 ASCII to hex conversion error
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