In most cases, PLC control systems require parameter adjustments during operation. One of the most common tasks is modifying the timer’s set value. To make this process easier for operators, several effective methods are available: 1. Using a Human-Machine Interface (HMI) Operators can use touchscreens, text displays, or industrial computers as HMIs to adjust timer parameters easily. While this method is user-friendly, it may involve higher costs depending on the system configuration. 2. Utilizing Built-in Analog Potentiometers Many small PLCs come with built-in analog potentiometers for setting parameters. For example, in Mitsubishi FX1N and FX1S PLCs, the external adjustment registers D8030 and D8031 correspond to the positions of these potentiometers. Similarly, the S7-200 series uses SMB28 and SMB29, while the CP1H model uses register A642 for its analog potentiometer settings. 3. Using an Analog Setting Function Expansion Board The FX2N-8AV-BD expansion board for the FX series includes eight potentiometers. Each can be read via the VRRD command, allowing users to set values for timers and counters directly through the application program. 4. Adding an LCD Option Board By adding an LCD option board like the CP1W-DAM01, operators can monitor and modify internal timer values more efficiently. This also helps visualize error statuses and improve overall system transparency. 5. Using External Contacts to Control Timer Settings An alternative approach involves using external contacts to control up/down counters within the PLC program. When a button is pressed, the counter increments or decrements based on the rising edge. The timer’s set value is then determined by the counter’s current value, adjusted according to the timer’s base time and the number of button presses. These methods provide flexibility and efficiency when managing timer settings in a PLC system, ensuring smooth and accurate operation in real-world applications. Bidirectional DC Power Supplies
The BPS series of bidirectional programmable power supplies are high-precision, low-ripple and fast response speed bidirectional DC Power Supplies with an all-digital signal control loop designed by iDealTek-Electronics based on IGBT high-frequency switching technology and bidirectional AC/DC topology architecture.
Different from the traditional DC power supply which only has constant voltage and constant current working modes, this series of programmable bidirectional AC DC power supplies have both power supply and load characteristics. It has multiple working modes of constant voltage, constant current, constant resistance and constant power, and can realize dual quadrant operation to allow the energy of the measured object to be fed back to the power supply. And Bidirectional AC-DC Power Supplies have built-in function generator, can freely generate arbitrary waveforms.
Bidirectional DC Power Supplies, Bidirectional Power Supplies, Bidirectional AC-DC Power Supplies, Bidirectional AC DC Power Supplies, Bidirectional Programmable Power Supplies Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com
This Bidirectional DC Power Supplies are featured for high reliability, efficient setting function and complete protections, also supporting the requirement of parallel connection of multiple-units to achieve output power rating expansion, making this bidirectional power supply the best choice for the cutting-edge application industry for automated testing, automotive production line manufacturing testing, photovoltaic plate aging testing and various DC power supplies.
This series of bidirectional DC power supplies adopt active power factor correction technology, which is specially designed for typical 380V and 480V AC two-phase or three-phase alternating current with the rated output power ranging 5KW / 10KW / 15KW, the maximum output voltage ranges from 80V to 2000V under different rated powers, and the bidirectional power can be flexibly adjusted. It can output a higher voltage at a lower current or a higher current at a low voltage while maintaining within the maximum rated power range.