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Questions tagged [plc]

Programmable Logic Controller

0 votes
1 answer
79 views

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 ...
Ri Di's user avatar
  • 1,039
0 votes
3 answers
91 views

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) ...
lexax127's user avatar
0 votes
0 answers
31 views

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://...
Sobekurxo's user avatar
0 votes
0 answers
22 views

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 ...
Minh Lý's user avatar
0 votes
1 answer
32 views

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 ...
llVIU's user avatar
  • 11
1 vote
1 answer
38 views

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. ...
gregory_000's user avatar
1 vote
0 answers
26 views

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. ...
Hamid s k's user avatar
  • 343
3 votes
0 answers
76 views

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 ...
Ryan Griggs's user avatar
  • 2,696
1 vote
0 answers
14 views

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 ...
Big Owls's user avatar
0 votes
0 answers
35 views

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 ...
Gurul_01's user avatar
1 vote
2 answers
148 views

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 ...
Gurul_01's user avatar
2 votes
2 answers
1k views

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....
ivvi's user avatar
  • 121
0 votes
3 answers
123 views

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 ...
Gurul_01's user avatar
0 votes
3 answers
215 views

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 ...
Gurul_01's user avatar
0 votes
2 answers
102 views

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 ...
Ryan Vine's user avatar
1 vote
1 answer
72 views

Runtime display for last 24 hours

I'm working on a BRX PLC connected to a C-More HMI. I'm using Do-More Designer to write ladder code. I'm looking for ladder logic that will give me the runtime of a circulating pump in the last 24 ...
Geo's user avatar
  • 45
2 votes
4 answers
189 views

Interfacing Delta PLC and Arduino (Logic Signals)

I am trying to connect a Delta PLC (DVP-10SX) to an Arduino UNO. What I'm trying to achieve here is to be able to exchange Logic signals between both the PLC which has a logic level of 0-24V and ...
ENG_MOH's user avatar
  • 21
0 votes
4 answers
115 views

Connecting every other DIN terminal to each other

I am building a custom panel. My output DIN terminals are supposed to be in this order: Power, Ground, Power, Ground, Power, Ground.... I cannot find a proper way (jumpers or bars) to connect them. ...
aeroengineer's user avatar
1 vote
2 answers
37 views

Does it make sense to look into the voltage and current of the power supply for my PLC controller?

The power supply of the PLC controller I am working with (X20PS9600 to be precise) has internal readings into software for the current and voltage it is delivering. I am not sure about the purpose of ...
h22's user avatar
  • 858
0 votes
3 answers
290 views

Reading 4-20 mA industrial pressure sensor

I am trying to read an industrial pressure sensor (datasheet) with range 0-10 bar and output 4-20 mA, with an Arduino Opta RS485, powered from an external 12 VDC source. Leaving the sensor in the air,...
p_a321's user avatar
  • 113
1 vote
2 answers
75 views

How to Drive a 50uA Panel Meter with a PLC Running 24v Inverted PWM Signal

Full disclosure, I am not an engineer of any kind. Just an electronics enthusiast. I have a Barth 850 micro PLC that needs to operate at 24v, and has one PWM output. I also have a 50uA panel meter ...
Joe Schmo's user avatar
0 votes
0 answers
49 views

Using both safety PLC and safety relay

I am in the process of designing a robotic cell. This contains a safety door and several e-stops. I want to use the safety PLC from siemens S7-1200F. I need to have two roller tracks with 8 24V motors ...
user357063's user avatar
0 votes
3 answers
190 views

Using the PLC output to mimic a NPN sensor as the input to a device

I got a device which has a connection to a NPN proximity sensor, it'll do something when the sensor is being trigged. Now I remove the sensor, using a PLC(24vdc) to do the job of sending the signal to ...
castiel's user avatar
  • 101
2 votes
1 answer
120 views

3 wire and 4 wire wiring configuration in PLC [closed]

I need some clarification on 3 and 4 wire connection. In the 2/3/4 wire system, Is the PLC must to provide power to the transmitter or transmitter is powered by the external supply.? Please clarify ...
Chitharanjan's user avatar
1 vote
1 answer
95 views

How does deceleration work on a servo drive?

I'm confused by the fact that PLCopen MC-blocks used to control servo drives from a PLC have separate acceleration and deceleration parameter. For instance, MC_MoveAbsolute. I don't understand what ...
relatively_random's user avatar
1 vote
1 answer
53 views

How to drive 0-85mA proportional solenoid valve with WAGO PLC 4-20mA or 0-10V?

I am looking to use an SMC PVQ valve. I need to drive it using a WAGO PLC. Common modules for the WAGO PLC are 4-20mA and 0-10V. How can I do it using these or any other module/method? Very little ...
Anthony's user avatar
  • 113
0 votes
0 answers
37 views

Driving multiple VFD controllers using collected data

I have a LoRaWAN sensor network that I setup which collects temperature data from multiple compost stacks and stores it in a database on the local network. I need to convert that data into an output ...
pheeper's user avatar
  • 101
0 votes
2 answers
111 views

If you autotune a PID while the controller is live what is the worst that can happen?

I am new to using PID in studio5000. I want to autotune a heater with a CV that stays at 100, never reaching the SP but just under it. I think that might help the controller finally reach the SP. What ...
Cyange's user avatar
  • 1
0 votes
0 answers
71 views

DC motor set to 0.25 RPM pulling -5 Amps at nearly 20% torque - Why the heck is it doing this?

Drive controlling the motor: PowerFlex DC Drive, 460 VAC, 3 PH, 27 Amps, 15 HP/11 kW, Regen, IP20, NEMA/UL Type Open, No HIM (Blank Plate), User Manual, No Communication Module, A Frame Motor in ...
Cyange's user avatar
  • 1
0 votes
1 answer
69 views

How can I identify this component on a PLC board that has gone bad?

How can I identify this component on a PLC board that has gone bad? Surface mount, unidirectional, G is the designator, 060 (090?) It measures as an open circuit with a multimeter on a bad board and ...
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