Understanding TCP/IP

Every device on the plant floor speaks TCP/IP. This book teaches it where you work, byte by byte and fault by fault, fully illustrated in engineering schematics.

Learn the ports of the plant (Modbus TCP on 502, EtherNet/IP on 44818 and 2222, OPC UA on 4840, MQTT on 1883 and 8883, DHCP and DNS), subnetting you can do in your head, a diagnostic ladder that walks from your own stack to the gateway to the device, and how to read the handshake: a refused connection means the device is alive but not listening, and a timeout means the path is eating packets.

Sixteen chapters, 79 schematic plates, a quick-reference appendix, a glossary, and an index. The network is legible. Go read the wire.