I left out the part in CAPS on my first post. Sorry. If I understand you correctly, it would seem that using Latch or Set relays would provide a solution. When the input goes true, use a one-shot to make a Latch relay go true. When the input goes false with the first latch relay on, Set a...
If I understand you correctly, it would seem that using Latch or Set relays would provide a solution. When the input goes true, use a one-shot to make a Latch relay go true. When the input goes false with the first latch relay on, Set a second latch relay on. With either latch relay on, turn...
I am not certain that the Seimens PLC has this feature, but Allen-Bradley PLC's have a "box" called SCP (I am pretty confident that Seimens does have a similar feature as most PLC manufacturers try to duplicate competitor's features).This box allows you to enter the range of input values (in...
Well, the analog I/O are obviously: Analog input>speed setting from the operator. Analog output would be used for some sort of speed display or feedback in a regulatory functioning circuit. The digitals are probably Drive Enable and Drive Run (VFD inputs) and the outputs would appear to be...
Recently, a request was forwarded to me for the following:
a customer has a twelve station warning system. The customer would like an audible sound, unique to each station. Each unique sound to be a SONG. When switch one is turned on, song 1 plays, switch 2..song 2, etc.. Oh yeah, this song...
I am an end user to integrators and an integrator for customers inside my facility. In my projects, I will ask the customer how they would describe the possible positions of a device, for use on a display. After all, it is only a label on the HMI. Normally, HMI's are used by operators so the...
I had the same issue, but the PC was assigning COM 1-4 automatically. I didn't know of a way to "reserve" those com port designations, so I ended up swapping the laptop for one with a serial port. As well as now having an unused USB to serial converter. Ain't this a FUN field to work in?
Any of these measures will require you to have one of two conditions satisfied. All of your heavy load equipment will have to be routed through contacts controlled by your power monitoring PLC or all of the PLC's that control those loads must be networked. For a small facility, that would be...
I am a 15 year "veteran" of PLC programming. I started with the Texas Instruments brand of PLC's (before SIEMENS bought them). I have extensive experience with AB SLC's and PLC 5's.
Recently, I accepted a position of Electronic Systems Analyst for a refrigerator manufacturing company. I am...
