Specifications

Introducing the S7-200 Micro PLC
1-3
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Table 1-1 Summary of the S7-200 CPUs
Feature CPU 221 CPU 222 CPU 224
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
Memory
Program 2048 words 2048 words 4096 words
User data 1024 words 1024 words 2560 words
Memory type EEPROM EEPROM EEPROM
Memory cartridge EEPROM EEPROM EEPROM
Data backup (super capacitor) 50 hours typical 50 hours typical 190 hours typical
Local I/O
Local I/O 6 In/4 Out 8 In/6 Out 14 In/10 Out
Number of expansion modules none 2 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)
Digital I/O physical size 10 62 128
Analog I/O image size none 16 In/16 Out 16 In/16 Out
Analog I/O physical size none 12 In/10 Out 12 In/10 Out
Instructions
Boolean execution speed 0.37 µs/instruction 0.37 µs/instruction 0.37 µs/instruction
Internal relays 256 256 256
Counters/Timers 256/256 256/256 256/256
Sequential control relays 256 256 256
For/Next loops Yes Yes Yes
Integer math (+ - * /) Yes Yes Yes
Real math (+ - * /) Yes Yes Yes
Enhanced Features
Built-in high-speed counter 4 (20 KHz) 4 (20 KHz) 6 (20 KHz)
Analog adjustments 1 1 2
Pulse outputs 2 (20 KHz, DC only) 2 (20 KHz, DC only) 2 (20 KHz, DC only)
Communication interrupts 1 transmit/2 receive 1 transmit/2 receive 1 transmit/2 receive
Timed interrupts 2 (1 ms to 255 ms) 2 (1 ms to 255 ms) 2 (1 ms to 255 ms)
Hardware input interrupts 4 4 4
Real-time clock Yes (cartridge) Yes (cartridge) Yes (built-in)
Password protection Yes Yes Yes
Communications
Number of communication ports: 1 (RS-485) 1 (RS-485) 1 (RS-485)
Protocols supported Port 0: PPI, MPI slave,
Freeport
PPI, MPI slave,
Freeport
PPI, MPI slave,
Freeport
PROFIBUS peer-to-peer (NETR/NETW) (NETR/NETW) (NETR/NETW)