motor control - PLC Programming & Automation

Timing a Motor Start: TON, RTO and What Survives a Power Cycle

Two timer tags open in one Studio 5000 watch window, a TON at 8342 ms of a 15000 ms preset and an RTO holding 2884019 ms of an hour

Pick between TON, TOF and RTO, find out what retentive actually covers on each platform, and stop losing an afternoon to a timer that never times out.

PowerFlex 525 F004 UnderVoltage: Brownouts, Bus Volts and What to Check

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Trace of a 200 HP compressor starting across the line on the same transformer: the 480 V line sags to 390 V for 1.2 seconds, the idle drives' DC bus follows it down and holds near 550 V while the loaded drives' bus falls from 648 V into the drive's low voltage band and faults F004 at 0.4 seconds

Several drives faulting F004 in the same second is a supply problem. How to work out the bus volts, log the sag safely, and read the trace it gives you.

PowerFlex 525 F013 Ground Fault: Finding It Without Guessing

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Insulation resistance of the washdown pump measured twice on the same leads: 0.4 megohm at 06:00 cold and damp before the first start, 60 megohm at 08:00 after two hours of running, against the 5 megohm IEEE 43 floor, with a panel listing what each combination of readings points at

F013 is current leaving the motor circuit for earth. A megger routine that separates motor, cable and junction box, with the readings that decide it.

PLC Motor Control VFD Setup: DOL, PowerFlex 525, G120

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Ladder rung: Start in parallel with the Run_Cmd seal-in contact, in series with a normally closed Stop and a Drive_Ready contact, driving the Run_Cmd output

Choose DOL or a drive, wire the stop so it works without the PLC, set the drive parameters and tags, then read the fault codes when it trips.

Siemens PLC Example 4 separate buttons and motors

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plc programming Siemens TIA Portal Screenshot plc

Siemens PLC Programming with Example Drive motors via siemens plc We will drive motors with four separate buttons, each motor has a different run command, and stop command. And we will add one rule for all motors that motors can run for more than 30 minutes, If any motor has been on for 30 minutes, … Read more

RSLogix PLC Programming Motor Start/Stop program

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Motor Start/Stop One Button Example We will examine how to start and stop an engine with a single button. Of course, while doing this, we plan to do this with minimum staff. In order to be suitable for the electrical circuit, instead of Latch and Unlatch (Set – Reset) commands the contacts that sealed it … Read more

Siemens PLC Timer Example

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Siemens PLC Programming Timer Instruction Example The motor will start 15 seconds after the start button is pressed, it will stop after 15 seconds after starting, then it will run again after 15 seconds. The engine will continue to run until you press the Stop button.

Siemens PLC Drive Motor Start Stop

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Siemens PLC Programming Drive Motor Regarding the previous article (Siemens Tia Portal). [irp posts=”3465″ name=”Siemens TIA (Totally Integrated Automation) Portal”] Let’s take an example and show step by step. In order to drive a DC Motor 30 seconds by a button (START and STOP), the following ladder diagram can be used. We choose the first … Read more

Star-Delta Motor Starting Mathematical Expansion

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Motor Starting Ways Asynchronous motors draw up to 3-4 times their nominal current at the time of the first start. Although these values do not have much effect on the electrical installation in small motors, they can cause some negative situations in large powerful motors. When a large powerful asynchronous motor draws 3-4 times the … Read more

Motor Start/Stop via Timer

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When the start button is pressed, the engine will start immediately and stop after 10 seconds. It will run again 10 seconds after it stops. (Two time relays will be used.)