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Shenzhen Coolmay Technology Co., Ltd. is a high-tech enterprise dedicated to the field of industrial automation control. Established with a focus on innovation and quality, Coolmay develops comprehensive automation solutions including Programmable Logic Controllers (PLCs), Human-Machine Interfaces (HMIs), and their signature integrated HMI/PLC all-in-one machines. These devices utilize advanced processors and support various communication protocols like Modbus and Mitsubishi programming standards, making them versatile for diverse industrial applications.

In addition to operational controllers, Coolmay produces industrial power supply modules, weighing modules, and wireless gateways. Their products are designed for reliability in harsh environments, utilizing optocoupler isolation and robust anti-interference measures to serve manufacturing and smart factory integrations worldwide.

• What communication protocols do Coolmay PLCs support?

  Coolmay PLCs and HMI/PLC all-in-one units typically support Modbus RTU/ASCII, Mitsubishi programming port protocols, and Free port protocols via RS232 and RS485 interfaces.

• How do I wire the inputs on a Coolmay PLC?

  Coolmay PLC inputs generally employ biphasic optocouplers, allowing for either NPN or PNP connections. For NPN, connect the S/S terminal to 24V; for PNP, connect the S/S terminal to 0V. Always ensure all inputs on a common block use the same method.

• Where can I download programming software for Coolmay devices?

  Programming software, drivers, and technical documentation such as the 'Coolmay EX3S Series Programming Manual' can be found on the official Coolmay website (en.coolmay.com).

• Does the Coolmay HMI/PLC support high-speed counting?

  Yes, many Coolmay all-in-one models support high-speed counting. For example, the EX3S series supports single-phase counting up to 6 channels or AB phase counting, typically up to 100KHz.

• What should I do if the PLC program is password protected?

  Coolmay PLCs allow encryption to prohibit program reading (commonly using passwords like 12345678). If a device is password-protected, the program cannot be read or uploaded without the original password set by the integrator.