Control Functions of Simo Motor's SZX Series DC Speed Regulation Cabinet
It is a fully open distributed I/O system constructed with PROFIBUS, featuring fast control response, high coordination synchronization and control precision, and strong anti-interference ability. Special technological programs can be compiled according to different processes, which can fully meet the process requirements and on-site control functions. It has strong expansion performance, and any points that are considered to need control, monitoring, and protection can be easily introduced.
The control functions of Simo Motor's SZX series DC speed regulation cabinet are divided into internal control and external control. Internal control refers to local control, that is, controlling a single on-site device on the control cabinet, which is convenient for single-unit debugging and maintenance. This function can also be completed through communication. External control refers to centralized control. Siemens medium and large PLCs are the core of the system control. The control, operation, and monitoring are completed through the PLC and external expansion modules and are carried out on the operation console and the central control computer. This function is mainly completed through PROFIBUS communication.
Display Functions of Simo Motor's SZX Series DC Speed Regulation Cabinet
2.1 Control Cabinet Group:
It displays the basic parameters and status of each unit: armature voltage, armature current, excitation current, rotational speed, and basic status indication.
2.2 The DC speed regulation device itself has a powerful display ability through the PMU on the front panel of the device.
It can display the current operating status of the equipment: RUN/READY/FAULT.
It has a fully digital display of various functions, process parameter values, or percentages of the set values, with high display accuracy. This includes: voltage, current, rotational speed, incoming line frequency, trigger angle, received data, etc. Through external definition and connection, it can also display motor temperature rise, temperature, various input and output statuses, etc.
The diagnosis is fully computerized, automatically displaying the fault (alarm) code, and automatically locking the first fault (alarm), which is convenient for finding the cause of the fault.
2.3 The operation console can centrally display various statuses and parameters as needed.
The most important indicators in the system. It is accurate and convenient, allowing the operator to grasp the operating status of the equipment in a timely manner. Depending on the specific process, it is generally the rotational speed, voltage, current, flow rate, pressure, etc., which can be displayed digitally or analogically.
Basic operation status indication. Indicators for the allowable start of each unit, closing indication, opening indication, fault indication, etc.
Monitoring of the adjustment mode, functional parameters, and status of auxiliary equipment.
2.4 Central Control Computer:
The industrial process control software WINCC is installed in the computer, with rich functions and a powerful configuration screen function. All values are guaranteed to be highly accurate and precise through accurate detection and calculation. A dedicated uninterruptible power supply (UPS) is equipped. Even if the power grid is powered off or the switch trips due to a fault, various fault display records and operating parameters will not be lost, facilitating maintenance personnel to analyze and troubleshoot.
It dynamically displays all the quantities that need to be monitored, with a digital display and high accuracy.
It can professionally set and modify process parameters (online available) and real-timely monitor the actual values fed back and compare them with each other. In principle, the parameters have been set and are not allowed to be modified. Authorization can be used to restrict to prevent random or incorrect operations.
It real-timely monitors the parameters with reference value, draws analog curves, and archives them. The data sampling is accurate, the cycle is short, the accuracy is high, and the archiving time is adjustable.
It professionally configures fault information, real-timely monitors, and archives it. Each item includes the time and date of the fault occurrence, duration, message text (fault description), error point, help text, message type, etc.
Fault Protection Functions of Simo Motor's SZX Series DC Speed Regulation Cabinet
Overvoltage, undervoltage, protection against too high or too low power frequency.
Overcurrent, overload, short-circuit protection.
Excitation circuit fault protection: under-excitation, phase voltage, fuse fault, etc.
Armature power supply phase power fault protection.
Electronic board power supply fault protection.
Motor over-temperature protection.
Tachometric feedback device fault protection.
Communication timeout protection, bus fault protection.
Usage Conditions of Simo Motor's SZX Series DC Speed Regulation Cabinet
4.1 Three-phase AC Power Supply Voltage:
There must be a three-phase AC power supply that is suitable for the voltage level and current capacity of the speed regulation device (or motor).
Power frequency: 45～65HZ. The direction of rotation has nothing to do with the power supply phase sequence, and there is no need to adjust it when changing the frequency.
4.2 Environmental Conditions:
Natural ventilation conditions:
Natural ventilation device: When the temperature is > +45℃, the capacity is used linearly decreased.
Fan forced cooling device: When the temperature is > +35℃, the capacity is used linearly decreased. For every 1℃ increase, the rated value is reduced by 1%.
Maximum ambient working temperature: +55℃.
Humidity < 80%.
Altitude: The rated sea level is 500 meters. For every 200 meters above 500 meters, the rated value is reduced by 1%.
