TCP & UDP Port 502 Information
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Port 502 common errors:There is no standard way for a node to find a data object_s description. There is no way for a field device to report by exception because Modbus is a master/slave protocol. The master node has to regularly scan each field device to look for alterations in the data. This requires bandwidth and network time in applications where bandwidth may be expensive. To learn more about errors in your system run a free registry scan.
Services or applications using this port:Modbus Port
Malicious services / applications:N/A
Port 502 details:
Protocol: TCP & UDP
IAMA status: Official
Traffic: inbound, outbound
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Technical description for port 502:
Port 502 is a serial communications protocol also functioning as a programmable logic controller. It has become a de facto standard communications protocol in the information technology industry. Port 502 is now the most popular and most accessible way of networking industrial electronic devices. The port permits the communication between devices connected to the same network. For instance, a system that can measure humidity and temperature can be programmed to communicate the results to a computer. Port 502 is commonly used as a supervisory computer with a remote terminal unit (RTU) to supervisory control and data acquisition (SCADA) systems.
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