# PLC (Programmable Logic Controllers) **URL:** https://forumautomation.com/c/plc-programmable-logic-controllers/6.md?page=7 [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) **Page:** 8 --- ## [Interface RS-232 scale value to PLC](https://forumautomation.com/t/interface-rs-232-scale-value-to-plc/11483)
**Author:** [@zenex](https://forumautomation.com/u/zenex)\ **Replies:** 0\ **Last updated:** [September 20, 2023, 9:16am UTC](https://forumautomation.com/t/interface-rs-232-scale-value-to-plc/11483 "2023-09-20T09:16:58Z")
Good morning all I would like to interface a weighing scale display value to a PLC in order to control a conveyor belt. The scale has an RS-232 output. PLC: Delta AS332-T or Delta T70P Weighing Scale: Micro A12E My fi… --- ## [What are the advantages of using a PLC compared to other control systems?](https://forumautomation.com/t/what-are-the-advantages-of-using-a-plc-compared-to-other-control-systems/12645)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 1, 2024, 4:54pm UTC](https://forumautomation.com/t/what-are-the-advantages-of-using-a-plc-compared-to-other-control-systems/12645 "2024-10-01T16:54:36Z")
Programmable Logic Controllers (PLCs) provide various advantages over older control systems like relay-based and distributed control systems (DCS). Here are the main advantages of using PLCs: 1). Flexibility 2). Re… --- ## [Triomotion CSC-DAC-MX](https://forumautomation.com/t/triomotion-csc-dac-mx/7824)
**Author:** [@northwind](https://forumautomation.com/u/northwind)\ **Replies:** 0\ **Last updated:** [January 31, 2020, 1:44pm UTC](https://forumautomation.com/t/triomotion-csc-dac-mx/7824 "2020-01-31T13:44:28Z")
Hello, Everyone :slight\_smile: I am an electronics engineer. I am repairing the TRIOMOTION CSC-DAC-MX module. Does anyone have access to this module and programmer? I need a 27C1024 memory source. There is an interpreter… --- ## [Programmables logic controller](https://forumautomation.com/t/programmables-logic-controller/6367)
**Author:** [@pateldarp50](https://forumautomation.com/u/pateldarp50)\ **Replies:** 0\ **Last updated:** [May 10, 2019, 8:57pm UTC](https://forumautomation.com/t/programmables-logic-controller/6367 "2019-05-10T20:57:11Z")
Why octal label system over decimal label in plc labeling? --- ## [Shift Register Ladder Diagram](https://forumautomation.com/t/shift-register-ladder-diagram/12884)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [December 6, 2024, 2:30am UTC](https://forumautomation.com/t/shift-register-ladder-diagram/12884 "2024-12-06T02:30:57Z")
Reset (Rung 1) Contact: Reset button (RB) Coil: Shift Register Reset (SRR) Load (Rung 2) Contact: Load button (LB) Coil: Shift Register Load (SRL) Shift (Rung 3) Contact: Shift button (SB) Coil: Shif… --- ## [Remove password from S7-200](https://forumautomation.com/t/remove-password-from-s7-200/7146)
**Author:** [@akbar\_torkashwand](https://forumautomation.com/u/akbar_torkashwand)\ **Replies:** 0\ **Last updated:** [September 18, 2019, 11:09am UTC](https://forumautomation.com/t/remove-password-from-s7-200/7146 "2019-09-18T11:09:10Z")
I want to upload program from S7-200 PLC simense .But it has password.how can I find password? --- ## [Problems related to innovance PLC](https://forumautomation.com/t/problems-related-to-innovance-plc/9477)
**Author:** [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\ **Replies:** 1\ **Last updated:** [June 7, 2021, 10:06am UTC](https://forumautomation.com/t/problems-related-to-innovance-plc/9477 "2021-06-07T10:06:19Z")
Innovance PLC is not taking power, what could be the possible problem? --- ## [PLC Communication Protocols](https://forumautomation.com/t/plc-communication-protocols/13261)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 20, 2025, 1:27pm UTC](https://forumautomation.com/t/plc-communication-protocols/13261 "2025-05-20T13:27:45Z")
\[color=#f80404\] PLC Communication Protocols \[/color\] In today’s smart manufacturing conditions, communication protocols are essential for enabling smooth interaction between PLCs, HMIs, Sensors, & Control systems. The… --- ## [What is the main cause of PLC failure?](https://forumautomation.com/t/what-is-the-main-cause-of-plc-failure/13407)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [July 30, 2025, 2:32pm UTC](https://forumautomation.com/t/what-is-the-main-cause-of-plc-failure/13407 "2025-07-30T14:32:15Z")
Top Causes of PLC Failures 1). Electrical Noise (EMI/RFI) 2). Power Supply Problems 3). Overheating 4). Improper Wiring (or) Loose Connections 5). Moisture, Dust & Corrosion 6). Software Bugs 7). Electrostatic Disc… --- ## [What is the purpose of data structures in programming for PLC modules like input/output module, counter module, etc.?](https://forumautomation.com/t/what-is-the-purpose-of-data-structures-in-programming-for-plc-modules-like-input-output-module-counter-module-etc/11893)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 0\ **Last updated:** [March 22, 2024, 9:11am UTC](https://forumautomation.com/t/what-is-the-purpose-of-data-structures-in-programming-for-plc-modules-like-input-output-module-counter-module-etc/11893 "2024-03-22T09:11:41Z")
What is the purpose of data structures in programming for PLC modules like input/output module, counter module, etc.? When it comes to the programming of programmable logic controllers (PLCs), data structures are an … --- ## [ETAP Unit replacement](https://forumautomation.com/t/etap-unit-replacement/8573)
**Author:** [@Ron\_Van\_Rensburg](https://forumautomation.com/u/Ron_Van_Rensburg)\ **Replies:** 0\ **Last updated:** [August 31, 2020, 10:10am UTC](https://forumautomation.com/t/etap-unit-replacement/8573 "2020-08-31T10:10:03Z")
Guys, can I replace an ETAP Module while the system is running? We have a port down and this needs addressing. Thanks --- ## [How does a PLC-Based Traffic Signal Control System Work?](https://forumautomation.com/t/how-does-a-plc-based-traffic-signal-control-system-work/13603)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 3, 2025, 4:11pm UTC](https://forumautomation.com/t/how-does-a-plc-based-traffic-signal-control-system-work/13603 "2025-10-03T16:11:11Z")
A PLC-based traffic signal control system automates traffic lights using a programmable logic controller (PLC). 1). Power Supply Section 110V AC Supply: The system starts with a standard 110V AC input. Circuit Breaker… --- ## [Issue with Conveyor Bit and One Shot in RSLogix Emulate](https://forumautomation.com/t/issue-with-conveyor-bit-and-one-shot-in-rslogix-emulate/12219)
**Author:** [@automation\_engineer6](https://forumautomation.com/u/automation_engineer6)\ **Replies:** 1\ **Last updated:** [July 1, 2024, 12:59pm UTC](https://forumautomation.com/t/issue-with-conveyor-bit-and-one-shot-in-rslogix-emulate/12219 "2024-07-01T12:59:15Z")
Issue with Conveyor Bit and One Shot in RSLogix Emulate I’m encountering an issue with my control logic in RSLogix Emulate, and I’m hoping to get some insights. Here’s the situation: When my proximity bit is energize… --- ## [How to reduce PLC cycle time?](https://forumautomation.com/t/how-to-reduce-plc-cycle-time/13398)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [August 2, 2025, 6:19am UTC](https://forumautomation.com/t/how-to-reduce-plc-cycle-time/13398 "2025-08-02T06:19:15Z")
How to reduce PLC cycle time? --- ## [PLCnext Technology](https://forumautomation.com/t/plcnext-technology/12117)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 31, 2024, 6:10pm UTC](https://forumautomation.com/t/plcnext-technology/12117 "2024-05-31T18:10:03Z")
Phoenix Contact developed PLCnext , an industrial controller platform that integrates PLC, motion control, & software technologies into a single system. Here are some important information of PLCnext: Hardware Archi… --- ## [Temperature measurement](https://forumautomation.com/t/temperature-measurement/9409)
**Author:** [@shauta](https://forumautomation.com/u/shauta)\ **Replies:** 0\ **Last updated:** [May 18, 2021, 9:55am UTC](https://forumautomation.com/t/temperature-measurement/9409 "2021-05-18T09:55:13Z")
Hello, I want to measure temperature in s7-400 and I need PDF where I read how to write measurement blocks in simatic manager. --- ## [Issue with Communication between Siemens PLC and HMI via Profinet](https://forumautomation.com/t/issue-with-communication-between-siemens-plc-and-hmi-via-profinet/12640)
**Author:** [@danieldelex](https://forumautomation.com/u/danieldelex)\ **Replies:** 0\ **Last updated:** [October 1, 2024, 4:02am UTC](https://forumautomation.com/t/issue-with-communication-between-siemens-plc-and-hmi-via-profinet/12640 "2024-10-01T04:02:23Z")
Hello I’m working on a project involving a Siemens S7-1200 PLC and a Siemens HMI. I’m trying to establish communication between the two using Profinet; but I’m facing issues where the HMI fails to receive data from the… --- ## [ISA-100 Wireless in PLC Systems](https://forumautomation.com/t/isa-100-wireless-in-plc-systems/12000)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [April 24, 2024, 1:27pm UTC](https://forumautomation.com/t/isa-100-wireless-in-plc-systems/12000 "2024-04-24T13:27:38Z")
Introduction ISA-100 Wireless is a wireless communication protocol that is widely employed in industrial automation & control systems, especially Programmable Logic Controllers (PLCs). It provides a solution for wire… --- ## [How do you optimize PLC code?](https://forumautomation.com/t/how-do-you-optimize-plc-code/13397)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [August 2, 2025, 6:21am UTC](https://forumautomation.com/t/how-do-you-optimize-plc-code/13397 "2025-08-02T06:21:47Z")
How do you optimize PLC code? --- ## [What is the difference between ControlLogix L8 and L9?](https://forumautomation.com/t/what-is-the-difference-between-controllogix-l8-and-l9/14023)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [April 24, 2026, 2:16pm UTC](https://forumautomation.com/t/what-is-the-difference-between-controllogix-l8-and-l9/14023 "2026-04-24T14:16:40Z")
What is the difference between ControlLogix L8 and L9? --- ## [What is the limit of counter in PLC?](https://forumautomation.com/t/what-is-the-limit-of-counter-in-plc/12807)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 11:45am UTC](https://forumautomation.com/t/what-is-the-limit-of-counter-in-plc/12807 "2024-11-11T11:45:32Z")
It is common practice for the program to display the current (or) “accumulated” value for us when it is operating on the PLC. This allows us to view the current count value. Counting ranges that are typically support… --- ## [How can PLC Ladder Logic automate a Three-Phase AC Motor?](https://forumautomation.com/t/how-can-plc-ladder-logic-automate-a-three-phase-ac-motor/13571)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [September 25, 2025, 12:33pm UTC](https://forumautomation.com/t/how-can-plc-ladder-logic-automate-a-three-phase-ac-motor/13571 "2025-09-25T12:33:23Z")
\[color=#ff0000\] How can PLC Ladder Logic automate a Three-Phase AC Motor?\[/color\] The following example shows a basic \[url= Explain Law of Conservation of Charge\]\[color=#1E00A3\] PLC \[/color\]\[/url\] program for controllin… --- ## [What is scaling block in PLC?](https://forumautomation.com/t/what-is-scaling-block-in-plc/13834)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [January 17, 2026, 4:40am UTC](https://forumautomation.com/t/what-is-scaling-block-in-plc/13834 "2026-01-17T04:40:02Z")
What is scaling block in PLC? --- ## [How to handle an Obsolete PLC without loss of Uptime?](https://forumautomation.com/t/how-to-handle-an-obsolete-plc-without-loss-of-uptime/13160)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [April 14, 2025, 2:02pm UTC](https://forumautomation.com/t/how-to-handle-an-obsolete-plc-without-loss-of-uptime/13160 "2025-04-14T14:02:18Z")
How to handle an Obsolete PLC without loss of Uptime? An obsolete PLC does not have to cause downtime. In industries such as elevators, escalators, & building automation, old controllers are common. Short-Term Soluti… --- ## [Empty bocks whilte trying to update a programme from s7-200](https://forumautomation.com/t/empty-bocks-whilte-trying-to-update-a-programme-from-s7-200/11201)
**Author:** [@Takfarinas](https://forumautomation.com/u/Takfarinas)\ **Replies:** 0\ **Last updated:** [May 30, 2023, 8:42pm UTC](https://forumautomation.com/t/empty-bocks-whilte-trying-to-update-a-programme-from-s7-200/11201 "2023-05-30T20:42:02Z")
Hi everyone, I encountered an issue while trying to upload a program from a PLC S7-216 in order to convert it to S7-1200. Two blocks (SBR) appear to be empty, and a red message indicates that they are invalid. I’m wonde… --- ## [PLC Pulse Stretcher](https://forumautomation.com/t/plc-pulse-stretcher/11943)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [April 8, 2024, 6:30pm UTC](https://forumautomation.com/t/plc-pulse-stretcher/11943 "2024-04-08T18:30:08Z")
The scan refers to the process of reading inputs, executing the program, & updating the outputs. A processor can read an input if it is not faster than the scan time. Some PLCs give software instructions that allow you… --- ## [PLC Quick Reference Guide: Simplifying Industrial Automation Logic](https://forumautomation.com/t/plc-quick-reference-guide-simplifying-industrial-automation-logic/13945)
**Author:** [@TSRS](https://forumautomation.com/u/TSRS)\ **Replies:** 1\ **Last updated:** [April 21, 2026, 9:56am UTC](https://forumautomation.com/t/plc-quick-reference-guide-simplifying-industrial-automation-logic/13945 "2026-04-21T09:56:01Z")
PLC Programming across Platforms: Different Brands, Same Core Logic If you have worked as a PLC programmer, you have likely come across multiple platforms such as Siemens , Allen-Bradley, Schneider, Mitsubish… --- ## [What are the different types of automation in PLC?](https://forumautomation.com/t/what-are-the-different-types-of-automation-in-plc/13851)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [January 30, 2026, 5:45pm UTC](https://forumautomation.com/t/what-are-the-different-types-of-automation-in-plc/13851 "2026-01-30T17:45:26Z")
What are the different types of automation in PLC? --- ## [What are the digital outputs of PLC?](https://forumautomation.com/t/what-are-the-digital-outputs-of-plc/13573)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [October 11, 2025, 5:35am UTC](https://forumautomation.com/t/what-are-the-digital-outputs-of-plc/13573 "2025-10-11T05:35:02Z")
What are the digital outputs of PLC? --- ## [How PLCs read Analog Values?](https://forumautomation.com/t/how-plcs-read-analog-values/13273)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 23, 2025, 12:03pm UTC](https://forumautomation.com/t/how-plcs-read-analog-values/13273 "2025-05-23T12:03:55Z")
In industrial automation, PLCs serve as essential for monitoring and controlling processes. While digital signals are simply ON or OFF, numerous industrial applications need accurate control over factors like • Temperat… --- ## [Kewei Software Wanted](https://forumautomation.com/t/kewei-software-wanted/12311)
**Author:** [@Tester68](https://forumautomation.com/u/Tester68)\ **Replies:** 0\ **Last updated:** [July 21, 2024, 10:29pm UTC](https://forumautomation.com/t/kewei-software-wanted/12311 "2024-07-21T22:29:40Z")
Hello everyone, I have a Kewei LP-08M08R+ACS-2AD/2DA and a WSP-0301-24 but unfortunately no software. Does anyone here have the software for me or an address where I can get it? Thanks and regards --- ## [What software to program Siemens logo?](https://forumautomation.com/t/what-software-to-program-siemens-logo/14154)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [June 6, 2026, 6:01am UTC](https://forumautomation.com/t/what-software-to-program-siemens-logo/14154 "2026-06-06T06:01:58Z")
What software to program Siemens logo? --- ## [Siemens S7-200 PLC Control Panel](https://forumautomation.com/t/siemens-s7-200-plc-control-panel/13478)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [August 22, 2025, 4:43pm UTC](https://forumautomation.com/t/siemens-s7-200-plc-control-panel/13478 "2025-08-22T16:43:48Z")
This is a Siemens S7-200 Smart PLC-based control panel designed for automation applications. It integrates various input devices (like push buttons), output indicators (pilot lights), communication modules, and power sup… --- ## [What PLCs use RSLogix 5000?](https://forumautomation.com/t/what-plcs-use-rslogix-5000/14100)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [May 21, 2026, 10:01am UTC](https://forumautomation.com/t/what-plcs-use-rslogix-5000/14100 "2026-05-21T10:01:17Z")
What PLCs use RSLogix 5000? --- ## [Difference between Standard PLC and Safety PLC](https://forumautomation.com/t/difference-between-standard-plc-and-safety-plc/13917)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [March 5, 2026, 11:39am UTC](https://forumautomation.com/t/difference-between-standard-plc-and-safety-plc/13917 "2026-03-05T11:39:38Z")
Difference between Standard PLC and Safety PLC Standard PLC vs Safety PLC Programmable Logic Controllers (PLCs) are widely used in industrial automation for controlling machines and processes. However when human safety … --- ## [What is a safety PLC used for?](https://forumautomation.com/t/what-is-a-safety-plc-used-for/14099)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [May 21, 2026, 10:01am UTC](https://forumautomation.com/t/what-is-a-safety-plc-used-for/14099 "2026-05-21T10:01:57Z")
What is a safety PLC used for? --- ## [PLC Analog Input Shows an Incorrect Process Value Even Though the Field Transmitter Output Is Correct](https://forumautomation.com/t/plc-analog-input-shows-an-incorrect-process-value-even-though-the-field-transmitter-output-is-correct/14342)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [August 28, 2026, 3:47am UTC](https://forumautomation.com/t/plc-analog-input-shows-an-incorrect-process-value-even-though-the-field-transmitter-output-is-correct/14342 "2026-08-28T03:47:03Z")
PLC Analog Input Troubleshooting PLC Analog Input Shows an Incorrect Process Value Even Though the Field Transmitter Output Is Correct A critical process vessel is fitted with a pressure transmitter. The transmitter has … --- ## [PLC Input Signal Is Not Detected Even Though the Field Instrument Is Operating](https://forumautomation.com/t/plc-input-signal-is-not-detected-even-though-the-field-instrument-is-operating/14352)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [September 5, 2026, 3:52am UTC](https://forumautomation.com/t/plc-input-signal-is-not-detected-even-though-the-field-instrument-is-operating/14352 "2026-09-05T03:52:52Z")
PLC Input Signal Is Not Detected Even Though the Field Instrument Is Operating During normal operation of a process plant, a pressure switch connected to a PLC digital input is expected to provide a signal when the proce… --- ## [SCADA Communication Error Appears While PLC Is Working Normally. How Can It Be Troubleshot?](https://forumautomation.com/t/scada-communication-error-appears-while-plc-is-working-normally-how-can-it-be-troubleshot/14403)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [September 13, 2026, 10:15am UTC](https://forumautomation.com/t/scada-communication-error-appears-while-plc-is-working-normally-how-can-it-be-troubleshot/14403 "2026-09-13T10:15:59Z")
SCADA Communication Error Appears While PLC Is Working Normally. How Can It Be Troubleshot? PLC and field instruments are working fine, but suddenly SCADA workstation shows communication error. Several process values … --- ## [Different Types of PLCs in Industrial Automation](https://forumautomation.com/t/different-types-of-plcs-in-industrial-automation/14197)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [June 16, 2026, 4:42am UTC](https://forumautomation.com/t/different-types-of-plcs-in-industrial-automation/14197 "2026-06-16T04:42:06Z")
Programmable Logic Controllers (PLCs) are most essential components in modern industrial automation systems. They provides a reliable control, monitoring & automation of machines and processes across various industries. … --- ## [What is redundancy in PLCs and how is it implemented?](https://forumautomation.com/t/what-is-redundancy-in-plcs-and-how-is-it-implemented/14447)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [September 25, 2026, 1:09pm UTC](https://forumautomation.com/t/what-is-redundancy-in-plcs-and-how-is-it-implemented/14447 "2026-09-25T13:09:38Z")
What is redundancy in PLCs and how is it implemented? --- ## [How does a PLC Ladder Logic Scan Cycle Control a Motor Start/Stop Circuit?](https://forumautomation.com/t/how-does-a-plc-ladder-logic-scan-cycle-control-a-motor-start-stop-circuit/14261)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [July 17, 2026, 2:34pm UTC](https://forumautomation.com/t/how-does-a-plc-ladder-logic-scan-cycle-control-a-motor-start-stop-circuit/14261 "2026-07-17T14:34:07Z")
A PLC scan cycle executes a ladder logic program continuously by reading input signals, processing the logic, updating output states, and repeating the sequence within milliseconds. This rapid cycle ensures reliable and … --- ## [PLC Output Types: Transistor vs. Relay](https://forumautomation.com/t/plc-output-types-transistor-vs-relay/14520)
**Author:** [@TSRS](https://forumautomation.com/u/TSRS)\ **Replies:** 0\ **Last updated:** [October 20, 2026, 4:04am UTC](https://forumautomation.com/t/plc-output-types-transistor-vs-relay/14520 "2026-10-20T04:04:22Z")
PLC Output Types: Transistor vs. Relay PLC Output Types: Transistor vs. Relay Transistor Outputs: High-speed switching for PWM and pulse signals. Long service life with no mechanical contact wear. Designed for … --- ## [Which PLC uses PROFIBUS?](https://forumautomation.com/t/which-plc-uses-profibus/14576)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 1\ **Last updated:** [November 6, 2026, 6:10am UTC](https://forumautomation.com/t/which-plc-uses-profibus/14576 "2026-11-06T06:10:46Z")
Which PLC uses PROFIBUS? --- ## [What types of inputs can be connected to a PLC?](https://forumautomation.com/t/what-types-of-inputs-can-be-connected-to-a-plc/14567)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 12:55pm UTC](https://forumautomation.com/t/what-types-of-inputs-can-be-connected-to-a-plc/14567 "2026-11-02T12:55:08Z")
What types of inputs can be connected to a PLC? A Programmable Logic Controller (PLC) receives process data through different input interfaces for monitoring, control, and industrial automation. 1. Digital Inputs (DI) R… [Previous page](https://forumautomation.com/c/plc-programmable-logic-controllers/6.md?page=6&per_page=50)