In July 2017, Pico Technology released the Modbus ASCII and Modbus RTU decoding software to further enhance the PicoScope oscilloscope's analytical capabilities. PicoScope is the only oscilloscope on the market that can decode and analyze Modbus (RS-232 / RS-485) signals, making it an ideal tool for industrial PLC commissioning - from installation, commissioning to maintenance and repair operations.

PicoScope is an ultra-versatile USB-based PC oscilloscope that combines six test and measurement instruments in one, including real-time oscilloscopes, protocol analyzers, logic analyzers, spectrum analyzers, function generators, and arbitrary waveform generators. These capabilities make PicoScope particularly suitable for serial bus signal integrity measurements. The Modbus decoding tool is suitable for all PicoScope models, from low-cost 2000 series to high-end 6000 series oscilloscopes. For non-reference earth signals such as RS-485, Biker's recently released PicoScope 4444 series supports up to four true differential differential probes without the need for external connections that are often required for industrial applications. The PicoScope comes standard with a series of automated measurement parameters and measurements based on screen rulers.

PicoScope is the only oscilloscope currently on the market for protocol analysis for Modbus, and Modbus is a serial communication protocol for programmable logic controllers (PLCs). Under the Modbus organization management, this simple and robust protocol is widely used to connect industrial electronics. PicoScope supports master and slave devices, standard and user-defined baud rates, and one or two ID bytes. PicoScope's deep storage benefits make it possible to capture hundreds of thousands of Modbus messages. Each of the saved information contains start / end time information, device IDs, function codes, transmission data, and CRC information and data validity checks. The collected information tables can be analyzed directly on PicoScope or exported in CSV format for off-line analysis. The associated file facilitates quick analysis by cross-referencing hexadecimal values, such as from ID to plain text. Click on the decoded frame information can be quickly associated with the corresponding analog waveform, which makes the bus error becomes easier.

Modbus bus decoding and analysis software comes standard with the latest PicoScope beta 6.13 version, currently supports a total of 18 kinds of serial protocols. The software is completely free, whether it is PicoScope's old customers or new customers, can be downloaded from the following website omoelec.com.

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