CPU module

Eachcpu module on the host are integrated 24V DC power supply, can be directly used to connect sensors and actuators. Use EEPROM memory to store programs and configuration information. User data can be super-capacitor storage host for several days, the optional battery module enables data storage time was extended to 200 days. You can use ordinary input terminals capture faster than the plc cpu scan cycle pulse signal, use interrupt inputs, allow at breakneck speed on the rising edge of the signal response. Speed of 30 kHz high-speed counter may be programmed, and having a reset input terminal, a plurality of separate inputs, can be simultaneously used and down counting, can be connected to a corresponding number of degrees of phase difference A 90 / B-phase incremental encoder . 2-way up to 20kHz frequency pulse output can be used to drive a stepper motor and servo motors to achieve accurate positioning tasks. You can use the potentiometer on the module to change its corresponding value in the special register, you can instantly change the program to run some of the parameters, such as setpoint timer / counter, the amount of process control parameters. Real-time clock can be used to fill the time stamp information, recording time, or on a machine running time process control.

PLC CPU Module

We are one of leading programmable logic controller (plc programmable controller) distributors from China.  PLC CPU Modules have different grades against different functions. & processing capacities to meet applications of various industrial control fields. PLC CPU Modules provide "RUN/STOP" switch to switch the CPU operation mode. It is integrated with switching value I/O and photoelectric isolation. It has RS232/RS485 communication interface for user to download and debug program, communicate with other devices. It has extension interface for high-speed data transmission between cpu modules and PLC extension modules. It is provided with power-off protection, high-speed I/O processing, analog potentiometer, password protection and real-time clock. With Watchdog function, it can be automatically reset and restarted under break-down.

The role of the CPU

CPU module is the control center of the cpu module module. It functions in accordance with the procedures given PLC system receives and stores from the programmer type of user programs and data; check the power supply, memory, I / O and watchdog timer status, and can diagnose the user program syntax error. I / O module is the interface between plc modules and site control interface input channels. Power module plays an important role in the overall system. If you do not have a good, reliable power system is not working properly, so the manufacturers of the PLC power supply design and manufacturing very seriously. Programming plays a role in the design and commissioning of the plc. Now a lot of free online plc programming software available.

The role of the CPU

CPU module is the control center of the cpu module plc. It functions in accordance with the procedures given PLC system receives and stores from the programmer type of user programs and data; check the power supply, memory, I / O and watchdog timer status, and can diagnose the user program syntax error. I / O module is the interface between plc IO module and site control interface input channels. Power module plays an important role in the overall system. If you do not have a good, reliable power system is not working properly, so the manufacturers of the PLC power supply design and manufacturing very seriously. Programming plays a role in the design and commissioning of the plc. Now a lot of free online plc programming software available.

what Consist CPU?

Command control logic to complete the instruction fetch, instruction and execution analysis instruction. Timing control logic to provide necessary control signals for each instruction in chronological order. General clock timing signal is the most basic, is the time base of the entire machine, called the machine speeds. The time required to execute an instruction called an instruction cycle, different instruction cycles may be different. Is generally easy to control, according to the nature of the operation and control of the different nature of the instruction, the instruction cycle will be divided into several stages, each stage is a CPU cycle. Early cpu modules memory with little difference in speed, so the plc cpu cycles and memory access cycle is generally the same, and later, with the development of CPU speed has now a lot faster than memory, CPU cycles so often defined as memory access a fraction of the cycle.

Bus control logic circuit is a plurality of features and services for information passage. Generally divided on the CPU in terms of the internal bus and CPU external bus outreach, the external bus is sometimes also called the system bus, the front side bus (FSB) and so on.

An interrupt is a computer due to an abnormal event, or some event occurs randomly require immediate treatment, cause the CPU to suspend execution of the program now, switch to another service program to deal with this incident, processed and then return to the original program process. Interrupts generated by the internal machine, we call it a trap (internal interrupt), caused by an external device interrupts called external interrupts.

CPU constitution

Sequence and data, PLC is an integral unit.
In the user view, unnecessarily detailed analysis of the internal circuit of the CPU, but each part is working mechanism should be enough to understand. The controller CPU CPU work, by its reading instruction, interpretation and execution of instructions instruction. However, the pace of work is controlled by the oscillation signal. Operator for digital or logic operations, working under the command of the controller. Intermediate result registers involved in computing, and storage operations, it also means a unitary controller deer Bru ao lt;? Br> CPU speed and memory capacity are important parameters for the PLC, which determines the operating speed of the PLC, IO number and software capacity etc., thus limiting the control scale.

CPU constitution

CPU is the core of the plc cpu, functions as the nerve center, each PLC have at least one plc modules, which functions according to the program given to the PLC system to receive and store user programs and data, by way of scanning the input collected by the field device sent state or data, and stored in the specified register, while the diagnostic power and internal circuit PLC working condition and programming syntax errors. After entering the run, one by one to read the instructions from the user program memory, then the task was analyzed by Directive generate appropriate control signals to command associated control circuitry