Siemens SIMATIC S7 System Manual page 705

Technical data
Expansion modules ex-
pansion
Signal board expansion
High- Total
speed
Single phase
counters
A/B phase
Pulse outputs
2
Pulse catch inputs
Cyclic interrupts
Edge interrupts
Memory card
Real time clock accuracy
Real time clock retention
time
You can configure areas of V memory, M memory, C memory (current values), and portions of T memory (current val-
1
ues) on retentive, up to the specified maximum amount.
The specified maximum pulse frequency is possible only for CPU models with transistor outputs. Pulse output operation
2
is not recommended for CPU models with relay outputs.
Table A- 40 Performance
Type of instruction
Boolean
Move Word
Real math
Table A- 41 User program elements supported
Element
POUs Type/quantity
Nesting depth
Accumulators Quantity
Timers Type/quantity
Counters Quantity
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
CPU ST40 DC/DC/DC
6 max.
1 max.
6
4 at 200 kHz
2 at 30 kHz
2 at 100 kHz
2 at 20 kHz
3 at 100 kHz
14
2 at 1 ms resolution
4 rising and 4 falling (6
and 6 with optional signal
board)
microSDHC Card (optional)
120 seconds/month
7 days typ./6 days min.
at 25 °C
Execution speed
150 ns instruction
1.2 μs/instruction
3.6 μs/instruction
Description
Main program: 1
Subroutines: 128 (0 to 127)
Interrupt routines: 128 (0 to 127)
From main program: 8 subroutine levels
From interrupt routine: 4 subroutine levels
4
Non-retentive (TON, TOF): 192
Retentive (TONR): 64
256
CPU SR40 AC/DC/Relay
6 max.
1 max.
6
4 at 200 kHz
2 at 30 kHz
2 at 100 kHz
2 at 20 kHz
3 at 100 kHz
14
2 at 1 ms resolution
4 rising and 4 falling (6
and 6 with optional signal
board)
microSDHC Card (optional)
120 seconds/month
7 days typ./6 days min.
at 25 °C
Technical specifications
A.2 S7-200 SMART CPUs
CPU CR40s AC/DC/Relay
Not available
Not available
4
4 at 100 kHz
2 at 50 kHz
Not available
Not available
2 at 1 ms resolution
4 rising and 4 falling
Not available
Not available
Not available
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