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.
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.
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
PLC FIFO Instructure Usage (FFL)
In this topic, we will see how the FFL (Fifo Load) command works and we will examine the Fifo command. The FIFO command is a command used in arrays. As the name suggests, it works with First In First Out logic. Also because arrays are used as local databases in PLC. With the FIFO command, … Read more
Create Controller Fault Routine
Check for a Specific Fault In this article, we will learn how to clear fault on Allen Bradley PLCs. Which is the continuation of our previous article. We will examine the automatic cleaning of the fault types that we have determined specifically, and error notifications at prescan time. You can find our previous article at … Read more
PLC Controller Fault Routine
If there are software or hardware errors in the PLC, you may not want to catch the error or stop your whole system due to the error. In these cases, you can use a fault routine to clear the fault and allow some part of your system to continue running. Failure routine runs the routines … Read more
RSLogix Emulate 500 Usage
RSLogix 500 emulator program is a software simulator for SLC500 plcs. You can load your plc programs to the emulator and run and simulate without the need for real plc. Where can I download the RSLogix 500 program? The RSLogix program can be downloaded from the Product Download page on the Rockwell site. . You … Read more
FactoryTalk Activation Manager Helper service is not running
If you get an error saying FactoryTalk Activation Helper service is not running when you try to start manager. You can fix the error with the following actions. FactoryTalk Activation Manager Error Details The FactoryTalk Activation Helper service is not running, and an attempt to automatically start it was unsuccessful. This service is an essential … Read more
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