Complete Plant Design with PLC, HMI, and Field Devices.

Map each motor to its drive method using nameplate data and process needs, choosing star-delta for fixed-speed motors and VFD for speed-controlled ones across the ammonia process.

Install five pressure transmitters to monitor and control pressure at key points—compressed air, the converter, steam release, and the oxidation and absorption towers—feeding the PLC and the HMI.

Learn seven level monitoring points using radar and DP level transmitters to control ammonia tanks, boilers, water storage, and product tanks, ensuring proper production rate and safety.

Classify plant loads into continuous, standby, and intermittent to size a transformer, summing motors, transmitters, utilities, air compressors, turbine, and fire hydrant system.

Explore the vector group of transformers, detailing primary delta and secondary star with neutral, 30-degree phase shift per din 11, and implications for parallel operation and design.

Select transformer vector groups by application, neutral needs, and harmonics. Use dyn11 for distribution with neutral; use d11 for balanced industrial loads; use dyn for unbalanced loads with single-phase lines.

Examine transformer cooling types, comparing oil cooled and dry type units, and learn the four categories ONAN, ONAF, OFAF, OFWF, with a 1 MVA medium transformer chosen for ONAN.

Size the main supply cables based on continuous and emergency loads. Use 870 kW for the main cable, 600 kW for the plant, and 400 kW for utilities.

Size the main plant cable with an IEC calculator, accounting for 870 kW load including fire hydrant, derating, and parallel 300 mm² circuits for a 3-phase 400 V system.

Size main plant cable for a 600 kW active load (75/25 split) using three 240 mm² circuits with neutral and 400 mm² earth at 400 V and 2.15% voltage drop.

Explore how a transmitter converts RTD and thermocouple signals to 4 to 20 mA or 0 to 10 V for PLC analog inputs, or use PLC cards to save costs.

Compare eight-channel rtd and thermocouple cards with ai cards, estimate Pakistani rupees, and choose direct plc sensor connections with spare io over transmitters.

Size switchgear for the S7 1516 PLC, accounting for 2.4 A inrush and 0.85 A. Use a 2 A C-curve MCB to tolerate startup, with optional fuse for secondary protection.

Explore common PLC communication protocols, including RS-232, RS-485, Modbus (RTU and TCP), TCP/IP, Ethernet/IP, Profibus, and Profinet, and their use with PLC and HMI for real-time data exchange.

Install flange-type rtd or thermocouple sensors on high-pressure lines to withstand pressure and prevent leaks. Avoid thread-type sensors in such lines, notably at tier 02.1 and tier 07.1.

Pressure transmitters measure pressure with a pressure transducer, converting it to a 4 to 20 mA or 0 to 10 V signal for real-time PLC monitoring and HMI display.

Select a high-temperature pressure transmitter with diaphragm seal and capillary tubing to monitor the converter (0–12 bar after 20% margin), using 4–20 mA hard communication, mounted remotely.

Select radar level transmitters over ultrasonic for accurate ammonia tank level measurement, addressing high pressure, low temperature storage, foam, and data reconciliation for process and supply chain.

Explore radar level transmitters that use electromagnetic waves and time-of-flight to measure tank level non-contact. Compare normal radar and guided wave radar, noting range, accuracy, and disadvantages.

Select a dp level transmitter using online applicator, input gauge pressure and tank head, choose 316l membrane, 4–20 ma output, and silicone oil fill for 400 mbar to 2 bar.

Learn how to measure boiler drum level with a differential pressure transmitter to keep water level safe, prevent water carryover into steam piping, and prevent tube rupture.

Learn how boiler drum level acts as a safety-critical measurement, using a differential pressure transmitter to indicate low or empty water with 20 mA, and high level with 4 mA.

Understand flowmeter straight run requirements, defining upstream and downstream, and how pipe diameter times factors (5x upstream, 3x downstream) determine required straight runs for accurate, laminar flow.

Compute Reynolds number from rho, v, d, and mu to classify flow as laminar, transition, or turbulent; lower flow rates yield laminar flow, higher rates yield turbulence.

Size the orifice plate and DP transmitter by considering viscosity, velocity, min/max/nominal flow, Reynolds number, laminar versus turbulent flow, vena contracta, and beta ratio for accurate pressure drop.

Learn how beta ratio, the bore diameter over the orifice outer diameter, governs pressure drop when sizing an orifice, with ideal values around 0.5 to 0.65.

Size the orifice for vapor ammonia flow to converter 2 using a dp transmitter and Bernoulli-based calculations, guided by the free Daniel Orifice Flow Calculator.

Install an electromagnetic flow meter to measure condensate water flow to the economizer; range 0–400 m3/h, 4 in schedule 40 pipe, 4–20 mA output, and account for water conductivity.

Install the flow meter in the sensor’s indicated direction to avoid inaccurate readings; provide a straight upstream of 5d (20 in) and downstream of 3d (12 in).

Compensated thermal magnetic tripping breakers provide overload and short circuit protection. A compensating bimetallic strip maintains a fixed trip set point across -5°C to 40°C.

Demonstrates a holding circuit that latches a motor on via a start push button and stops it with a normally closed stop push button.

Explore variable frequency drives (VFDs) and learn basics to sizing, selection, parameter setting, controlling, and wiring for motors of varying kilowatt ratings, with practical sizing on one example.

Explore how a VFD converts a three phase ac input to dc and back to ac with pwm to set output frequency, e.g., 20 Hz, for motor speed control.

Use the ABB drive and motor selector online. For an 11 kW, 400 V motor in chemical oil and gas industry, ABB ACS 880 is recommended for variable speed control.

Examine VFD hardware, including input and motor terminals, the control panel, and how local versus remote operation via PLC or HMI governs start, stop, and parameter setup.

demonstrates basic parameter settings on an acs 580 vfd for a three-phase asynchronous motor, entering nameplate data: 440 v, 50 hz, 85 a, 2975 rpm, phase order u w v.

Configure io parameter settings on the ACS 580 VFD, assign DI1 for start/stop and DI2 for direction, and use AI1 AI2 for remote reference and feedback.

Learn how control valves regulate fluid flow in a line, from manual to electric motorized, pneumatic, and hydraulic valves controlled remotely by a PLC in automated plants.

Develop a basic PLC program that uses the start push button at I 0.0 to energize contactor coil at Q 0.0, then compile, download, and simulate with PLC sim 15.1.

Explore the TP timer, the sleep timer, that activates output Q0.0 for a programmed period using a 20s DT value, and note its independence from input changes.

Explain how a Siemens S7-1500 reads 4–20 mA from a flow meter transmitter, scales it with Nomex and scale blocks, and converts it to an integer 0–27648 for display.

Learn how a plc reads a 4 to 20 milliamp signal, normalizes it to 0-1 with Nomex, and scales it to engineering units for the HMI.

Configure a nitric acid plant PLC and HMI by selecting an S7-1500 CPU, adding digital and analog input and output cards, and wiring RTD and thermocouple channels.

Design an auto/manual control using the HMI and PLC by implementing auto and manual select push buttons, holding circuits, and NC/reset logic to latch or reset selections.

Simulate a motor control program in a PLC environment by loading blocks and configuring feedback. Test manual and auto modes, observe tripping alarms, and interpret HMI indicators during motor simulation.

Program a sequential plant start where, after a 10-second delay set by the operator via the hmi, the water circulation motor turns on using timer-driven auto sequence with no contact.

Simulate analog alarms in a PLC by wiring blocks for motors, tripping alarms, control valves, and analog signals, then monitor with the HMI and adjust the set point.

Programmed 13 alarms for motor and valve trips and low air pressure, and implemented an auto stop sequence that powers off motors immediately then closes valves after 10 seconds.

Demonstrates uploading and running a modular PLC program, switching auto and manual modes, simulating motor operation with I0.0 and I0.1 feedback, and tracking motor running hours with an HMI.

Design manual and auto start/stop sequences for motors and control valves in an HMI, using pop-up screens and visibility to show motor status.

Display transmitter values on the hmi by reading scaled final plc values with a numerical block, showing level, temperature, flow, and pressure.

Explain how to set and adjust the transmitter’s LRV and URV values through the HMI, including scaling 4–20 mA signals, operator input, retention of values, and password-protected access for field substitutions.

Replace old alarm bits with the new alarm data block across motors, controls, and networks using cross reference, covering digital and analog alarms.

Design the alarm page in the PLC/HMI project, configure the alarm view with pending and acknowledged states, and set columns and sorting so the most recent alarm appears first.

Explore how the plant runs through the PLC and HMI, verify valve and motor status, respond to faults, alarms, and reset logic, and observe safe startup and shutdown sequences.

Master the line and neutral concept to complete circuits. Use the same neutral from one supply for all 24 V DC control elements; mixing neutrals prevents PLC inputs from activating.

Learn digital input wiring basics for PLC systems, covering wiring with 24-volt DC, sinking mode, X0 and X12, and using normally open and normally closed push buttons.

Explore wiring Siemens PLC digital outputs to 220 v ac field devices using a 24 v dc run relay and 20 v ac feedback relays to drive the contactor.

Connect the Siemens plc output cards to relay coils, supplying 24 volt dc with proper neutrals and two 20 volt ac commons to energize contactors.

Explore how a Siemens plc turns on a motor through digital input and output wiring, using a 24-volt dc relay and a 220-volt ac feedback relay, with hmi alarm.

Learn how to start and stop a VFD using a PLC digital output and an external 24-volt relay, converting external supply to the VFD's internal 24-volt control.

Learn to wire four transmitters to a four-channel PLC analog input card by tying all negatives to the power supply, fusing positives, and using jumpers for field wiring termination.