K1 is a 110 V AC contactor on a saw, its coil is switched by a solid-state relay, the SSR is driven from output pair 0 of a 1791ES-IB8XOBV4, and every 600 ms the contactor makes a small tick you can hear from the door of the panel. The scope on O0+ shows why: the … Read more
A 1769-IQ16 takes 8 ms to see an input. Here is the counter module that will not, the quadrature arithmetic, and where the pulses actually get lost.
PNP sensor wiring is decided on the input card’s spec sheet, and almost nobody reads that row. Under Voltage category, a 1756-IB16 says 12/24V DC sink and a 1756-IV16 says 12/24V DC source — same form factor, same 16 points, same 5V off-state threshold, and only one of them will ever see a PNP sensor … Read more
The station is an IM 155-6 PN with an ET 200SP F-DI 8x24VDC HF in slot 3, the CPU is a 1515F-2 PN on TIA Portal V17, and the hardware compiles clean with a warning that says the F-module has no valid PROFIsafe address yet. The guard door on channel 2 is wired as two … Read more
A CPU 1515F-2 PN on TIA Portal V17, an ET 200SP station with an F-DI 8x24VDC HF, and channel 2 on it is a guard door. The buffer showed “Channel 2: Short-circuit” last week and the channel passivated; the electrician found a chafed wire in the door loom and repaired it, the buffer now says … Read more
Maximum PROFIBUS segment length at every DP baud rate on type A cable, with repeater rules, termination values and the meter checks that find the fault.
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.
TIA Portal refuses the load because the CPU firmware is lower than the configured version. Read the real numbers, then pick the fix.
If you want to be a good PLC programmer, you will search and you need have start immediately work, how you will work and how you will do, you will learn in this article. How do I become a plc automation programmer? You can use emulator programs to learn PLC or look at sample plc … Read more
Communication Modules Communication modules provide data exchange between PLCs and input-output units or between other personal computers. These modules can be operated by direct connection (point to point) or over a network. In a one-to-one connection, the connected processor includes a dual interface. While one computer port is accessed by the programming device, communication is … Read more
PLC Programming Example Design the circuit that adds up to 2 sensors (input), presses the F1 button, subtracts when the F2 button is pressed, divides when the F3 button is pressed, multiplies when the F4 button is pressed, and gives the output to the output. Let’s do the PLC simulation. I1.5 Start I0.0 1st … Read more
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