Modbus polling and timeout budget: calculate the slow path
Estimate serial transaction time, include silent intervals and device response, and prevent offline devices from consuming the entire polling cycle.
IT/OT convergence
Merging of IT and OT systems and organizations.
The merging of information technology and operational technology networks, data, and organizations — shared infrastructure, unified identity, and combined analytics. Creates efficiency and expands the attack surface, which is why segmentation and joint governance come with it.
See also: OT · Zones and conduits
Use the concept: Subnet calculator · Modbus RTU CRC & frame helper · Modbus register decoder & byte-order check
In depth
Single-pair Ethernet and APL: two wires to the field instrument
How Single-Pair Ethernet and Ethernet-APL bring power and 10 Mbit/s Ethernet to hazardous-area field devices — and what changes in process design.
SCADA architecture: a design guide from field to control room
Design SCADA systems that scale — field layer, communications, servers, redundancy, and alarming — without painting the project into a corner.