What's the difference between Siemens 200 series models?

S7-200 series is outstanding in the following aspects:

1) extremely high reliability. ?

2) Very rich instruction set. ?

3) easy to master. ?

4) convenient operation. ?

5) Rich built-in integration functions. ?

6) Real-time characteristics. ?

7) Strong communication skills. ?

8) Rich extension modules. ?

Edit the scope of application of this paragraph

S7-200 series gives full play to its powerful functions in distributed automation system. The application range can range from simple control instead of relay to more complex automatic control. The application field is very wide, covering all industrial and civil fields related to automatic detection and control, including various machine tools, machinery, power facilities, civil facilities, environmental protection equipment and so on. Such as: stamping machine tools, grinding machines, printing machinery, rubber chemical machinery, central air conditioning, elevator control, motion systems. ?

S7-200 series PLC can provide 8 kinds of CPU and 4 different basic models for your use. ?

Edit the CPU unit design of this paragraph.

Integrated 24V load power supply: it can directly connect sensors and transmitters (actuators). CPU22 1, 222 has 180mA output, and CPU224, CPU224XP and CPU226 output 280,400ma respectively. Can be used as load power supply. ?

Different device types. ?

CPU22 1~226 has two types of CPUs with different power supply voltages and control voltages. ?

Local digital input/output point. ?

CPU22 1 has 6 input points and 4 output points, CPU222 has 8 input points and 6 output points, CPU224 has 14 input points and 10 output points, and CPU224XP has 14 input points and 10 output points. ?

Analog input/output point of this machine. ?

CPU224XP has two input points and 1 output points. ?

Interrupt input. ?

It is allowed to respond to the rising edge of the process signal at an extremely fast speed. ?

High speed counter. ?

CPU22 1/222?

Four high-speed counters (30KHz) are programmable and have reset inputs. Two independent inputs can count up and down at the same time, and two A/B phase incremental encoders with a phase difference of 90 can be connected. ?

CPU224/224XP/226 .?

The functions of six high-speed counters (30KHz) are the same as those of CPU22 1/222. ?

CPU222/224/224XP/226 .?

It can be easily extended by digital and analog expansion modules. Simulator (optional) can be used to simulate the input signal of this machine to debug the user program. ?

Edit the analog potentiometer.

CPU22 1/222 1。 ?

224/224 XP/2262 CPU。 ?

Cpu221/222/224/224xp/226 is also available. ?

Pulse output

Two channels of high-frequency pulse output (maximum 20KHz) are used to control the stepper motor or servo motor to realize the positioning task. ?

real-time clock

For example, time stamp the information, record the running time of the machine or time control the process. ?

EEPROM memory module (optional)?

It can be used as a quick tool to modify and copy programs (without programmers), and can also be used to assist software archiving. ?

Battery module

Used for long-term data backup. User data (such as flag bit status, data block, timer, counter) can be stored for about 5 days through the internal supercapacitor. The storage time of the battery module can be extended to 200 days (10 year life). The battery module is inserted into the card slot of the memory module. ?

Programming: CPU 221/222/224/224 XP/226.

STEP7-Micro/WIN32V3. 1 Programming software can program all CPU 221/222/224/224xp/226 functions. At the same time, you can also use the software package step 7-micro/win16v2.1,but only support programming the same functions as S7-21x. ?

STEP7-Micro/DOS cannot program CPU 221/222/224/224xp/226. If you use PG/PC serial port programming, you need to use PC/PPI line. ?

If you use STEP7-Micro/WIN32V3. 1 programming software, you can also use SIMATICCP55 1 1 or CP56 1 1 programming. In this case, the communication rate can be as high as 187.5kbit/s/s?

With PC/PPI cable and free port communication function, S7-200CPU can be connected to many devices compatible with RS-232 standard. ?

There are two different types of PC/PPI cables:

For isolated PC/PPI cable with RS-232 port, set baud rate and other configuration items with 5 DIP switches (see the figure below). ?

For non-isolated PC/PPI cable with RS-232 port, the baud rate is set by four DIP switches. For the technical specifications of non-isolated PC/PPI cable, please refer to S7-200 PLC system manual. ?

When data is transmitted from RS-232 to RS-485, PC/PPI cable is in transmission mode. When data is transmitted from RS-485 to RS-232, PC/PPI cable is in receiving mode. When a character is detected in the transmission line of RS-232, the cable immediately switches from the receiving mode to the transmitting mode. When the idle time of RS-232 transmission line exceeds the cable switching time, the cable switches to the receiving mode again. This time is related to the baud rate selection set by the DIP switch on the cable. ?

Edit the advantages of each model in this paragraph.

CPU22 1?

This machine integrates 6 inputs /4 outputs *** 10 digital I/O points. No I/O expansion capability. 6 kilobytes of program and data storage space. Four independent 30kHz high-speed counters and two independent 20kHz high-speed pulse outputs. 1 RS485 communication/programming port with PPI communication protocol, MPI communication protocol and free communication capability. It is very suitable for microcontrollers with few points. ?

CPU222?

This machine integrates 8 inputs /6 outputs *** 14 digital I/O points. Two extension modules can be connected. 6 kilobytes of program and data storage space. Four independent 30kHz high-speed counters and two independent 20kHz high-speed pulse outputs. 1 RS485 communication/programming port with PPI communication protocol, MPI communication protocol and free communication capability. It is very suitable for microcontrollers with few points. ?

CPU224?

This machine integrates 14 input/10 output ***24 digital I/O points. Seven expansion modules can be connected, which can be extended to 168 digital I/O points or 35 analog I/O points at most. 13kbyte program and data storage space. 6 independent 30kHz high-speed counters, 2 independent 20kHz high-speed pulse output, with PID controller. 1 RS485 communication/programming port with PPI communication protocol, MPI communication protocol and free communication capability. The I/O terminal board can be easily disassembled as a whole. It is a controller with strong control ability. ?

CPU224XP?

The machine integrates 14 input/10 output * * 24 digital I/O points, 2 input/1 output * * 3 analog I/O points, which can be connected with 7 expansion modules, and the maximum expansion value can reach 168 digital I/O points or 38. 20K byte program and data storage space, 6 independent high-speed counters (100KHz), 2 high-speed pulse outputs (100KHz) and 2 RS485 communication/programming ports, with PPI communication protocol, MPI communication protocol and free-form communication capability. This machine has also added many functions, such as built-in analog I/O, position control characteristics, self-tuning PID function, linear ramp pulse command, diagnostic LED, data recording and formula function. It is a new CPU with analog I/O and powerful control ability.

CPU226 integrates 24 inputs/16 outputs ***40 digital I/O points. 7 expansion modules can be connected, which can be expanded to 248 digital I/O points or 35 analog I/O points at most. 13kbyte program and data storage space. 6 independent 30kHz high-speed counters, 2 independent 20kHz high-speed pulse output, with PID controller. Two RS485 communication/programming ports with PPI communication protocol, MPI communication protocol and free-form communication capability. The I/O terminal board can be easily disassembled as a whole. Used in more demanding control systems, it has more input/output points, stronger module expansion ability, faster running speed and stronger internal integration special functions. It can completely adapt to some complex small and medium-sized control systems. SIMATICS7-300 is a small modular PLC system. A wide range of functional modules can well meet and adapt to automatic control tasks, and various single modules can also be widely combined and expanded. Because of its simple and practical decentralized structure and multi-interface network capability, S7-300 is very flexible in application. Its characteristics are as follows:

Humanized and concise fanless design?

When the control task increases, it can be expanded freely; ?

Because of its extensive integration function, it is very powerful;