Know-how protection in TIA Portal: working with a block you cannot open
A know-how protected OEM block will not open. What TIA Portal still lets you do with it, why the compile error sits in your call, and how to clear it.
firmware
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.
PLC Hardware Components and the Software That Uses Them
What is in a PLC rack and how the software sees it: power supply budget, CPU memory, I/O cards, tasks and routines, and tags against S7 addresses.
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.
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.
PLC Controller Firmware Upgrade
A controller firmware upgrade with ControlFLASH, step by step, plus the revision each 1756-L6x and L7x needs to match the project version.
Allen-Bradley PLC I/O Faults Causes/Solutions
Allen Bradley fault codes for I/O connections, 16#0001 upward, what each string means and which end of the connection you should be looking at.
ControlLogix PLC Major Fault Codes Causes and Solutions
A ControlLogix fault codes list by type and code, with the cause behind each major fault and the recovery method that clears it.
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