PLC Energy Management: Metering, Demand and Shedding
Wire a power meter into Logix or S7, totalize kWh in Structured Text, hold the demand peak with priority load shedding, and check if a VFD retrofit pays.
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PLC Industry 4.0: OPC UA, MQTT and Real Data Models
What an Industry 4.0 project really changes on the PLC: the OPC UA server, a UDT to JSON data model, MQTT at the edge, retrofits and security.
PLC Batch Control with ISA-88 Phases in Studio 5000
Build PLC batch control the ISA-88 way: procedure and phase breakdown, the phase state model, recipe parameters in a UDT, hold and restart logic.
PLC Motion Control: Kinetix 5700 and Logix MAM Moves
PLC motion control step by step: motion group setup, coarse update period, axis scaling, MSO and MAM moves, homing, gearing and position error faults.
Redundant PLC Systems: ControlLogix Pairs and S7-1500R/H
What a 1756-RM2 pair buys you, the design restrictions nobody mentions until commissioning, real switchover times, and when redundancy is the wrong answer.
Remote PLC Monitoring and Control Without Open Ports
Remote access to a PLC that security will sign off: outbound VPN routers, read-only web HMI, an access rights table, a permissive rung and an audit trail.
PLC Renewable Energy: Inverters, Pitch and Curtailment
SunSpec Modbus inverter limits, tracker stow, wind turbine pitch and yaw, a battery SoC window with BMS handshake, and curtailment setpoints over DNP3.
PLC Power Generation: Permissives, Sync and Load Shed
Where the PLC stops and the relay starts, a generator start permissive rung, the synchronising handshake, load shed stages and switchgear interlocks.
Sequential Function Chart PLC Programming, Step by Step
Build a working SFC in Studio 5000: steps, transitions, action qualifiers, the SFC Execution settings that decide what happens on a restart, and S7-GRAPH.
Machine Learning PLC Integration: Where the Model Runs and What the Controller Owns
The PLC does not run the model. What to publish, how the score returns as an advisory tag with a watchdog, and a pump anomaly detector on CompactLogix.
PLC Troubleshooting: A Method That Finds Real Faults
A repeatable PLC troubleshooting order: module LEDs, controller major faults, I/O connection status, forces, cross-reference, trends and Ethernet checks.
Fuzzy Logic PLC Control: Rule Tables, Inference in ST and a Dryer Example
Where fuzzy control beats PID, how to hand-code memberships, a 3×3 rule table and weighted-average defuzzification in Logix ST, with a dryer example.
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