Introducing the S7-200 Micro PLC
1-3
S7-200 Programmable Controller System Manual
A5E00066097-02
Table 1-1 Summary of the S7-200 CPU
Feature CPU 221 CPU 222 CPU 224 CPU 226
Physical Size of Unit
90 mm x 80 mm x
62 mm
90 mm x 80 mm x
62 mm
120.5 mm x
80 mm x 62 mm
190 mm x
80 mm x 62 mm
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Memory
Program 2048 words
2048 words
4096 words
4096 words
User data 1024 words
1024 words
2560 words
2560 words
User program storage EEPROM EEPROM EEPROM EEPROM
Data backup
(super capacitor)
50 hours typical
50 hours typical
190 hours typical
190 hours typical
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Local I/O
Local I/O 6 In/4 Out
8 In/6 Out
14 In/10 Out
24 In/16 Out
Number of expansion modules none
2 modules
7 modules
7 modules
Total I/O
Digital I/O image size 256
(128 In/128 Out)
256
(128 In/128 Out)
256
(128 In/128 Out)
256
(128 In/128 Out)
Analog I/O image size none 16 In/16 Out 32 In/32 Out 32 In/32 Out
Actual I/O count that can be realized with each CPU may be limited by image register size, module count, 5V power, and
the physical number of I/O points on each product. See Section 1.3.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Instructions
ÁÁÁÁÁÁÁ
Boolean execution speed at 33
MHz
0.37µs/
instruction
ÁÁÁÁ
0.37 µs/
instruction
ÁÁÁ
0.37 µs/
instruction
ÁÁÁÁ
0.37 µs/
instruction
I/O Image Register 128 I and 128 Q 128 I and 128 Q 128 I and 128 Q 128 I and 128 Q
Internal relays 256 256 256 256
Counters/Timers 256/256
256/256
256/256
256/256
Word In / Word Out None 16/16 32/32 32/32
Sequential control relays 256 256 256 256
For/Next loops Yes
Yes
Yes
Yes
Integer math (+ - * /) Yes
Yes
Yes
Yes
Real math (+ - * /) Yes
Yes
Yes
Yes
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Enhanced Features
Built-in high-speed counter 4 H/W (20 KHz)
4 H/W (20 KHz)
6 H/W (20 KHz)
6 H/W (20 KHz)
Analog adjustments 1
1
2
2
ÁÁÁÁÁÁÁ
Pulse outputs 2 (20 KHz,
DC only)
ÁÁÁÁ
2 (20 KHz,
DC only)
ÁÁÁ
2 (20 KHz,
DC only)
ÁÁÁÁ
2 (20 KHz,
DC only)
Communication interrupts 1 transmit/
2 receive
1 transmit/
2 receive
1 transmit/
2 receive
2 transmit/
4 receive
ÁÁÁÁÁÁÁ
Timed interrupts 2
(1 ms to 255 ms)
ÁÁÁÁ
2
(1 ms to 255 ms)
ÁÁÁ
2
(1 ms to 255 ms)
ÁÁÁÁ
2
(1 ms to 255 ms)
Hardware input interrupts 4, input filter
4, input filter
4, input filter
4, input filter
Real-time clock Yes (cartridge)
Yes (cartridge)
Yes (built-in)
Yes (built-in)
Password protection Yes Yes Yes Yes
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