Questions tagged [plc]
Programmable Logic Controller
279
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How may I manually construct CAN message for CANopen?
I understand CANopen uses CAN, the difference is usage and message type. I have basic CAN capable device and I want to control industrial motor controller, which uses CANopen.
I have its EDS file, but ...
- 1,039
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3
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84
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Convert 0-10V signal to 0-20mA (PLC)
I am designing at the time a process in which we will use a PLC to control some valves and mass flow controllers. The PLC we have has an input module for 0-20 mA. One of our sensors (flow measurement) ...
- 5
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XTR111 4-20mA/0-10V before mux stage
I am currently designing a PLC-like module based on a STM32 microcontroller. I want to have up to 8 analog outputs generating 0-10V or 4-20mA signal. I am heavily relying on this design by TI: https://...
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PLC delta DVP28SV controls maximum how many servo axes
I want to use PLC DELTA DVP28SV11T to control 6 servo motors but I can only control 4 motors. When using the 10khz output pulse at Y10 and Y13 to control the 5th servo motor, it cannot run. How should ...
- 1
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PLC is 2 - 5 VDC and relay works only at 16 - 24 VDC?
I got a panel where the PLC output has 2 - 5 VDC and the relay connected to it says 24 VDC, it will not work below 16 VDC. What's the deal here, aren't PLCs usually 5 VDC? Was the PLC supposed to be ...
- 11
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36
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Transmission of the signal from the Hall sensor to the PLC
I would need help with my application for counting impulses sent from a Hall sensor. Below is the description of the application.
In the project, I have a 2-pin Hall sensor powered by +13VDC. ...
- 13
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26
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Arrangement of isolated variable DC input
I design isolated DC input for industrial applications that can possibly work from 12 to 24 V.
I add a 5.1 V Zener for over-voltage protection, a capacitor for filtering, and TVS for surge production.
...
- 343
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76
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How does online code editing work in a PLC?
Some PLCs, such as Allen Bradley CompactLogix, allow "online" changes to be made to the running program on the PLC. These changes are (almost) instantly applied and don't require the PLC to ...
- 2,696
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Data availability on a HART device network configured for multi-drop mode
We have 2 flow meters on an equipment installation that are HART-capable. As they are installed today, configuring these devices in multi-drop mode would be much easier than running additional wire ...
- 73
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34
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Control cabinet rules
I am building an electrical enclosure box equipped with a smart relay (PLC) and containing a 60W 24VDC power supply which is supplied from 230V AC. The PLC controlles a small 15W DC motor and ...
- 15
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137
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Twisted pair wiring 4-20 mA sensor
I have a pressure sensor with 24 V, GND and 4-20 mA signal output pins. It will communicate with a PLC. I will only use 3m of wire max. for each pin. The installation will be on the rooftop maybe a ...
- 15
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Difference between interlock and permissive
There seems to be somewhat differing and sometimes overlapping definitions of these terms. Below are definitions found in The Automation, Systems, and Instrumentation Dictionary, Fourth Edition by ISA....
- 121
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DIN rail terminal block resistor
Is there a reliable solution for placing my own through hole resistor into a DIN rail mountable terminal block? Or is there any off the shelf solution the use a resistor to convert my 4-20mA current ...
- 15
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3
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202
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4-20mA analog output into a digital input?
I'm measuring the 0-10V pressure output of a pressure sensor with a LOGO! smart relay (PLC). I would like to make sure that the pressure sensor is working even when I'm measuring nearly zero values ...
- 15
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How do I take a 24 volt DC 10-30 kHz PWM signal from a Click Plus PLC and convert it to a 5 volt DC PWM signal to control a pump?
I am working on a small dose spraying system for a farming application. I have a Click Plus PLC, part number C2-01CPU-2, and it has one IO card so far, a C2-14D2. I want the PLC to control a Kamoer ...
