PowerFlex 525 F004 UnderVoltage: Brownouts, Bus Volts and What to Check
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.
PLC & HMI
Every PLC and HMI tutorial on plctr.com: project setup, ladder and structured text, communication, troubleshooting and commissioning, written from the plant floor.
Two Motors on One VFD: When It Works and When It Does Not
P033 [Motor OL Current] on a PowerFlex 525 holds exactly one number. Land two 3 HP motors on T1, T2 and T3 and that number is now watching the pair as though they were one 6 HP machine, which leaves neither motor protected. That single parameter is the whole argument. Two standard induction motors will … Read more
PowerFlex 525 F013 Ground Fault: Finding It Without Guessing
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.
Download without reinitialization in TIA Portal: keeping values after an interface change
Add one Static to an FB and every setpoint in the instance DB goes to zero. How the memory reserve prevents it, how to size it, and how to recover.
TIA Portal HSP missing: getting a new device into the hardware catalog
The CPU says V4.6 and the hardware catalog stops at V4.5. What a hardware support package does, how to install one offline, and when you need a newer TIA.
S7-1200 firmware mismatch: why the download stops and how to fix it
TIA Portal refuses the load because the CPU firmware is lower than the configured version. Read the real numbers, then pick the fix.
How to Create a Project in Studio 5000 (Step by Step, v33)
Create a new Studio 5000 Logix Designer project the right way: pick the controller, match the firmware revision, add I/O, write the first rung, download and go online.
Studio 5000 Watch Window: Monitor Tags While Online
Build watch lists in the Studio 5000 Watch window, monitor and write tag values online, and know when the sample rate hides what you are chasing.
ControlLogix Ladder Troubleshooting, Rung by Rung
A rung by rung ControlLogix ladder troubleshooting method: read the highlighting, use cross reference and search, find double coils, read the fault record.
Allen-Bradley Faults and Solutions: Read the Type and Code
The controller is in Program mode, the OK indicator is flashing red, and the Major Faults tab in Studio 5000 reads Type 4, Code 20. Two numbers, and they are the whole diagnosis. An instruction reached for an array element that does not exist. Nothing is wrong with the hardware. Type tells you which part … Read more
PLC Programming Example
We can use the “FOR DO” command structure to find the sought value in an array. In the example below, I will explain how to run the “FOR DO” command in the STL language that I have prepared for you and understand the index number of a number in the array or whether this number … Read more
PLC AVE (Average) Instruction Example
We all know what the mean command means and what it does mathematically. The average command is generally used to average a series of variables. In general, we assign the data to an array every second so that it is not affected by instantaneous changes at the decision-making point according to variable values such as … Read more
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