Configuration of Modbus in Lookout. ModbusSlave: The ModbusSlave object acts as a slave to equipment such as PLCs, distributed control systems (DCSs), or other devices that can act as a Modbus master. The ModbusSlave object enables Lookout to respond to unsolicited messages generated by other devices on a Modbus protocol network. Hi, I am doing masters in electrical engineering and writing a discovery tool to discover connected Modbus slave devices behind TCP/IP gateway. From what I read, for discovering a slave device behind TCP/IP gateway, I need to send a request to each slave ID and then listen for the response thereby concluding a device exists only if I get a response from any slave ID. As for 1-byte slave addressing, the number of slave addresses to check is 247 and hence is taking too long time. Is there any way by which I can discover which slave IDs have a Modbus device apart from querying each address(since Modbus slave devices don't need to respond to broadcast message at slave ID 0) Thanks, Aditya. You have clicked on the '?' Button for search help. To search the site, enter your search terms in the box labeled 'search the site' and hit Enter. Some tips for better search results. • Precede each search term with a '+', as follows: • +Modbus +TCP Otherwise, any post with either term will match. • Use double quotes around phrases, as follows: • +'Allen Bradley' +ethernetOtherwise, posts containing these words in separate locations will match. • To exclude a word, precede it with a '-', as follows: • +Modbus -Plus This will return only posts containing 'Modbus' but NOT containing 'Plus'. Tv wifi receiver. • Note that common words (and, that, etc.) and words shorter than 2 characters are automatically excluded from searches. Select the categories for which you would like to see messages displayed. Applications Application Questions and Problems Automation Business The Business of Automation and Control Communications Communications systems and equipment. Engineering Engineering and workplace issues. HMI Human-Machine Interface and SCADA. Information Information resources, documentation. Languages Programming languages. Motion Control Motion control, servos, steppers, etc. Networking Local and wide area networking in factory automation. Open Control Open interfaces, software and hardware PCs in Automation Computers in manufacturing; also hardware discussion. PLCs PLCs and related questions. Power Generation Power generation equipment control. Process Control Continuous process industries, DCS questions. Sensors Sensor technologies. Software in Automation Software, including programming, OS issues, etc.
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