Technical Specifications
A-7
C7-635 Control System
A5E00155581-04
A.3 Technical Specifications for CPU
Memory
User memory
• Integrated 64 KB
• Expandable No
Loading memory Plug-in (MMC)
Backup Ensured with MMC (maintenance-free)
Processing Times
• Bit operation Minimum 0.1 μs
• Word instructions Minimum 0.2 μs
• Fixed-point arithmetic Minimum 2 μs
• Floating-point maths Minimum 6 μs
Timers/Counters and their Retentivity
S7 counters 256
• Retentivity Adjustable
• Default From C 0 to C 7
• Counting range 0 to 999
IEC Counters Yes
• Type SFB
• Number Unlimited (limited only by user memory)
S7 timers 256
• Retentivity Adjustable
• Default No retentivity
• Timing range 10 ms to 9,990 s
IEC timers Yes
• Type SFB
• Number Unlimited (limited only by user memory)
Siemens Controls
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