ABB | Control processor module | HC800
CPU module is mainly composed of a microprocessor (CPU chip) and memory. In the PLC control system the plant CPU module is equivalent to the human brain, which constantly collects input signals, executes user programs and refreshes the output of the system; the memory is used to store programs and data.
Input (1nput) modules and output (Output) modules are referred to as I/O modules, they are the eyes, ears, hands and feet of the system and are the bridge between external field devices and the CPU module.
Input modules are used to receive and collect input signals. Switching input modules are used to receive switching input signals from push buttons; selector switches, digital dip switches, limit switches, proximity switches, photoelectric switches, pressure relays, etc.; analogue input modules are used to receive continuously changing analogue current and voltage signals from potentiometers, speed generators and various transmitters.
The switching output module is used to control output devices such as contactors, solenoid valves, solenoids, indicators, digital display devices and alarm devices, while the analogue output module is used to control actuating devices such as regulating valves and frequency converters.
The working voltage of the CPU module is generally 5V, while the input/output signal voltage of the PLC is generally higher, such as 24V DC and 220V AC. the spike voltage and interference noise introduced from outside may damage the components in the CPU module, or make the PLC not work properly. In the I / O module, with photocouplers, phototransistors, small relays and other devices to isolate the internal circuit of the PLC and the external I / O circuit, I / O module in addition to the transfer of signals, there is a level conversion and isolation role.
HC800
1、Highly reliable system design
Firstly, the communication module should be able to support multiple connection methods (e.g. point-to-point, wired and wireless). Secondly, it should have good anti-interference capability. Finally, it should be able to adapt to harsh environments. Therefore, the selection of communication modules must be tested in a targeted manner. For example, load tests, reliability tests, system failures, etc. are carried out on the system and the data is backed up and processed or updated in real time.
2. Well-established protocol stack
General communication modules are developed according to the protocols provided by the manufacturer, so that they cannot meet the evolving needs of the communication field. So a good communication module should be able to support more types of protocols, such as: Serial data transmission protocols: TCP/IP, UDP, etc. Wireless data transfer protocols: GSM, GPRS, 3G, etc.
3. Rich interface types
For example, the microcontroller can be connected to the serial port of external devices, and the communication module can also be connected to the serial port of external devices, and the communication module can also be connected to the I/O interface of external devices, which provides a lot of convenience for users. In addition, the diversity and compatibility of interface types should be taken into account. For example, the interface of a microcontroller can correspond to the interface type of the communication module, while it can also be used on other devices. This also means that the communication module can be either a universal microcontroller, programmable chip, etc.; a universal peripheral board; or a universal sensor, etc.
PPD512 A10-454000
PM891K01 3BSE053241R1
PM866AK02
PFTL201C 10KN 3BSE007913R10
5SHY4045L0004
5SHY4045L0006
PPD103-B03-10-150000
5SHY3545L0010/3BHB013088R0001
5SHX2645L0002
5SHX2645L0004
DSDP140B 57160001-ACX
KUC755AE106
3HAC029818-001/10 DSQC663
KUC755AE117
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