1. Introduction Modbus communication is a widely used communication protocol, commonly applied in variable frequency drives, smart instruments, and other intelligent devices. This article uses the S7-200SMART series PLC as the Modbus master and the Siemens V20 variable frequency drive and Omron E5EZ intelligent temperature controller as slaves to share how to use a custom … Read more
1. Siemens LOGO and S7-200 are ultra-compact PLCs suitable for single-machine control or small system control, applicable in various industries and scenarios for automatic detection, monitoring, and control. S7-300 is a modular small PLC system that can directly control equipment and monitor multiple lower-level programmable controllers. It is also suitable for medium or large control … Read more
PLC instructions are machine instructions used by programmable logic controllers (PLC). They are a series of low-level instructions used to control the PLC’s internal operations, logic operations, timing, counting, jumping, and other functions. Comprehensive PLC Instruction Manual 1. LD (Load): Energize contact 2. LDN (Load Not): De-energize contact 3. A (And): Used for series connection … Read more
1. Siemens RECRUIT LOGO and S7-200 are ultra-compact PLCs suitable for single machine control or small system control, applicable in various industries and situations for automatic detection, monitoring, and control. S7-300 is a modular small PLC system that can be used for direct control of devices and can monitor multiple lower-level programmable controllers. It is … Read more
1. Omron PLC Programming Software The Omron PLC programming software integrates CX-Programmer V9.5, providing comprehensive software support for Omron PLC programming, fully compatible with 32/64-bit WIN8 systems, and available in multiple languages, including Simplified Chinese. It can be used for configuring networks, programmable terminals, servo systems, electronic temperature control, and more. It is suitable for … Read more