# PLC (Programmable Logic Controllers) **URL:** https://forumautomation.com/c/plc-programmable-logic-controllers/6.md [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) --- ## [Preventive maintenance for PLC system](https://forumautomation.com/t/preventive-maintenance-for-plc-system/3774)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [June 4, 2018, 1:55pm UTC](https://forumautomation.com/t/preventive-maintenance-for-plc-system/3774 "2018-06-04T13:55:45Z")
What is Preventive maintenance? The preventive maintenance program is the deterrent for PLC program faults. Preventive maintenance of programmable controller systems includes only a few basic procedures, which will gr… --- ## [Learn Allen Bradley, PLC Programming & PLC Training Training For Free](https://forumautomation.com/t/learn-allen-bradley-plc-programming-plc-training-training-for-free/195)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [December 14, 2014, 6:10am UTC](https://forumautomation.com/t/learn-allen-bradley-plc-programming-plc-training-training-for-free/195 "2014-12-14T06:10:09Z")
Friends I would like to introduce logixpro 500.It is a simulator for learning Allen bradley PLC.Evaluation version is available for free download. You will get 15 days trial version .Logixoro 500 is a simulator for RSlog… --- ## [Basics of PLC timers | Types of PLC timer](https://forumautomation.com/t/basics-of-plc-timers-types-of-plc-timer/2568)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 4, 2017, 5:52pm UTC](https://forumautomation.com/t/basics-of-plc-timers-types-of-plc-timer/2568 "2017-11-04T17:52:12Z")
PLC timers are instructions that provide the same functions as on-delay and off-delay mechanical and electronic timing relays. A PLC timer provides a preset delay to the control actions. In general, there are three type… --- ## [What is PLC and What are its applications?](https://forumautomation.com/t/what-is-plc-and-what-are-its-applications/9944)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 6:24am UTC](https://forumautomation.com/t/what-is-plc-and-what-are-its-applications/9944 "2021-10-27T06:24:45Z")
What is PLC? According to National Electrical Manufacturers Association (NEMA), a Programmable Logic Controller (PLC) is an electronic device that uses a programmable memory to perform various functions such as counting… --- ## [What are the applications of PLC?](https://forumautomation.com/t/what-are-the-applications-of-plc/3936)
**Author:** [@areejsidhik](https://forumautomation.com/u/areejsidhik)\ **Replies:** 0\ **Last updated:** [June 26, 2018, 6:01am UTC](https://forumautomation.com/t/what-are-the-applications-of-plc/3936 "2018-06-26T06:01:34Z")
PLC’s are used in wide range of industries like petrochemical,biomedical,distillery,beverages,food industries and any other industry that seek less human help to produce the product.With the help of PLC some of the proce… --- ## [Communication connection types of Simatic PLC with other hardware](https://forumautomation.com/t/communication-connection-types-of-simatic-plc-with-other-hardware/5910)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [February 12, 2019, 2:37pm UTC](https://forumautomation.com/t/communication-connection-types-of-simatic-plc-with-other-hardware/5910 "2019-02-12T14:37:04Z")
S7-200 CPUs can be configured to work in network communications. A personal computer with the Step7-Micro / Win32 program or a programming device SIMATIC PG740 can be used as a “master device”. The types of network commu… --- ## [PLC simulator free download](https://forumautomation.com/t/plc-simulator-free-download/3287)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 2\ **Last updated:** [October 25, 2024, 2:29pm UTC](https://forumautomation.com/t/plc-simulator-free-download/3287 "2024-10-25T14:29:49Z")
This app is a simulation of a Programmable Logic Controller (PLC). The PLC simulator applications allow to write your program in ladder logic and run it in the simulated PLC. The applications are useful for beginners to … --- ## [What are the Models of SIEMENS PLC?](https://forumautomation.com/t/what-are-the-models-of-siemens-plc/8961)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [December 15, 2020, 5:36am UTC](https://forumautomation.com/t/what-are-the-models-of-siemens-plc/8961 "2020-12-15T05:36:37Z")
Siemens is a German MNC headquartered in Munich founded by Ernst Werner Siemens in 1847. It is the largest industrial manufacturing company in Europe. Types of Siemens PLC Based on your suitable applications and requir… --- ## [Continuous bottle filling system using PLC](https://forumautomation.com/t/continuous-bottle-filling-system-using-plc/3937)
**Author:** [@areejsidhik](https://forumautomation.com/u/areejsidhik)\ **Replies:** 0\ **Last updated:** [June 26, 2018, 7:02am UTC](https://forumautomation.com/t/continuous-bottle-filling-system-using-plc/3937 "2018-06-26T07:02:28Z")
Introduction This is one of the important application of PLC in the bottle filling industry where we want our bottles, which move on the conveyor belt, to be automatically detected in the proper position and fill the d… --- ## [How to Connect Siemens PLC with SCADA System via OPC UA?](https://forumautomation.com/t/how-to-connect-siemens-plc-with-scada-system-via-opc-ua/9608)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 1\ **Last updated:** [October 15, 2021, 9:57am UTC](https://forumautomation.com/t/how-to-connect-siemens-plc-with-scada-system-via-opc-ua/9608 "2021-10-15T09:57:38Z")
In this article, we will discuss how to configure a connection between Siemens PLC S7-1500 to SCADA system by using OPC-UA. What is OPC and Why is it necessary? OPC stands for Object Linking and Embedding, shortly call… --- ## [How to crack password of s7-200 PLC CPU224](https://forumautomation.com/t/how-to-crack-password-of-s7-200-plc-cpu224/168)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 6\ **Last updated:** [September 18, 2019, 11:00am UTC](https://forumautomation.com/t/how-to-crack-password-of-s7-200-plc-cpu224/168 "2019-09-18T11:00:07Z")
HOw to crack S7-224 cpu password Hello friends anyone guide me how to crack password of s7-200 PLC CPU224…i forgot the password --- ## [How to scale Analog Input values - Siemens PLC](https://forumautomation.com/t/how-to-scale-analog-input-values-siemens-plc/207)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [December 27, 2014, 2:44am UTC](https://forumautomation.com/t/how-to-scale-analog-input-values-siemens-plc/207 "2014-12-27T02:44:45Z")
Siemens PLC Analog Input Scaling The following variables are pertinent to the scaling formula: Ov = scaled output value Iv = analog input value Osh = high limit of the scale for the scaled output value Osl = low limit of… --- ## [How field devices are wired to PLC?](https://forumautomation.com/t/how-field-devices-are-wired-to-plc/2370)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 2, 2017, 6:01pm UTC](https://forumautomation.com/t/how-field-devices-are-wired-to-plc/2370 "2017-10-02T18:01:35Z")
During the wiring of PLC, the wire size is an important factor. One or more conductors can be accepted by the input-output terminal of a particular wire size we need to check that if the wire is the proper size and is co… --- ## [How to do Upload and Online edit in RSLogix 5000](https://forumautomation.com/t/how-to-do-upload-and-online-edit-in-rslogix-5000/4958)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 19, 2018, 4:40pm UTC](https://forumautomation.com/t/how-to-do-upload-and-online-edit-in-rslogix-5000/4958 "2018-10-19T16:40:30Z")
Upload program from a PLC A program can be uploaded from a PLC that is currently connected to an open project. Use the following procedure to transfer the program from the PLC. Select the PLC object in the pro… --- ## [How to decrypt Allen Bradley RS Logix 5000 program (Unlock Password)](https://forumautomation.com/t/how-to-decrypt-allen-bradley-rs-logix-5000-program-unlock-password/939)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 2\ **Last updated:** [June 6, 2026, 5:54am UTC](https://forumautomation.com/t/how-to-decrypt-allen-bradley-rs-logix-5000-program-unlock-password/939 "2026-06-06T05:54:23Z")
This post will help you to find out answers for some of your questions regarding Allen Bradley password protection. How to unlock source code of RS logix 5000 PLC program ? How to unprotected a password protected RS log… --- ## [Applications and Advantages of PLC (Programmable Logic Controllers):](https://forumautomation.com/t/applications-and-advantages-of-plc-programmable-logic-controllers/467)
**Author:** [@instrumen](https://forumautomation.com/u/instrumen)\ **Replies:** 0\ **Last updated:** [June 26, 2015, 6:32pm UTC](https://forumautomation.com/t/applications-and-advantages-of-plc-programmable-logic-controllers/467 "2015-06-26T18:32:18Z")
APPLLICATIONS OF PLC: Proper application of a PLC begins with an economical justification analysis. The batch process in chemical, cement, food and paper industries are sequential in nature, requiring time or event based… --- ## [PLC ladder logic program for Cyclic Movement of a Piston](https://forumautomation.com/t/plc-ladder-logic-program-for-cyclic-movement-of-a-piston/6574)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [June 19, 2019, 6:13pm UTC](https://forumautomation.com/t/plc-ladder-logic-program-for-cyclic-movement-of-a-piston/6574 "2019-06-19T18:13:29Z")
\[color=#ff0000\]\[size=5\]Ladder logic program for Single-piston movement: \[/size\]\[/color\] \[color=#0B5394\]\[size=3\]To understand the cycle movement of a piston, first we have to consider a single piston movement. The figure… --- ## [What is PLC Redundancy?](https://forumautomation.com/t/what-is-plc-redundancy/9681)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [August 2, 2021, 12:57pm UTC](https://forumautomation.com/t/what-is-plc-redundancy/9681 "2021-08-02T12:57:23Z")
In this article, we will discuss about PLC Redundancy. In engineering systems, redundancy means providing dependability and a process alternative to a failing condition. In process control systems each industry has its… --- ## [What are various ladder logic symbols?](https://forumautomation.com/t/what-are-various-ladder-logic-symbols/10520)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [July 9, 2022, 3:53am UTC](https://forumautomation.com/t/what-are-various-ladder-logic-symbols/10520 "2022-07-09T03:53:43Z")
Traditional relay logic control circuits were utilised to develop the ladder logic symbols used in PLC programming. If you have a rudimentary understanding of electric circuits, you should have no trouble getting started… --- ## [PLC Input/Output Capabilities (I/O Modules)](https://forumautomation.com/t/plc-input-output-capabilities-i-o-modules/2916)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 2\ **Last updated:** [August 2, 2024, 1:45pm UTC](https://forumautomation.com/t/plc-input-output-capabilities-i-o-modules/2916 "2024-08-02T13:45:44Z")
A programmable logic controller or PLC is a general-purpose controller, applicable to many different types of process control applications. There are different I/O capabilities in PLC modules and there are also different… --- ## [How to unlock protected function block in Siemens S7 PLC - SIMATIC MANAGER](https://forumautomation.com/t/how-to-unlock-protected-function-block-in-siemens-s7-plc-simatic-manager/972)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [April 9, 2016, 1:27am UTC](https://forumautomation.com/t/how-to-unlock-protected-function-block-in-siemens-s7-plc-simatic-manager/972 "2016-04-09T01:27:45Z")
Microsoft Access is used for remove the password protection of function blocks used in SIMATIC MANAGER Siemens S7 plc. Step by Step Procedure In the above picture you can see the function block is protected.You cann… --- ## [What is sinking and sourcing in PLC?](https://forumautomation.com/t/what-is-sinking-and-sourcing-in-plc/2621)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 10, 2017, 6:57pm UTC](https://forumautomation.com/t/what-is-sinking-and-sourcing-in-plc/2621 "2017-11-10T18:57:41Z")
The Sinking and Sourcing are the input/output module cards used in PLCs. Conventional Relay cards are simple and very easy to the interface but suffer from the mechanical limitation of low operation and limited lifespan.… --- ## [What is Ladder diagram?](https://forumautomation.com/t/what-is-ladder-diagram/1227)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 1\ **Last updated:** [August 8, 2017, 10:18am UTC](https://forumautomation.com/t/what-is-ladder-diagram/1227 "2017-08-08T10:18:22Z")
Ladder Diagrams - Ladder diagrams are also called line diagrams or elementary diagrams.Ladder diagrams are used to represent the function of the control control circuit and associated devices but they dont show the comp… --- ## [How to write a Siemens S7 300 and STEP 7 PLC program by using SIMATIC Software](https://forumautomation.com/t/how-to-write-a-siemens-s7-300-and-step-7-plc-program-by-using-simatic-software/452)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 2\ **Last updated:** [December 10, 2018, 7:12pm UTC](https://forumautomation.com/t/how-to-write-a-siemens-s7-300-and-step-7-plc-program-by-using-simatic-software/452 "2018-12-10T19:12:17Z")
1.Open SIMATIC Manager. SIMATIC Manager is a program which manages subprograms of STEP 7. 2.To start our programming first we need to create a new project by clicking on the “new” icon on the toolbar to open the “new pr… --- ## [Why 24VDC digital input is widely used in PLCs?](https://forumautomation.com/t/why-24vdc-digital-input-is-widely-used-in-plcs/3469)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [April 22, 2018, 10:33pm UTC](https://forumautomation.com/t/why-24vdc-digital-input-is-widely-used-in-plcs/3469 "2018-04-22T22:33:22Z")
24VDC is just robust enough to overcome any long distance signal wire v-drop to carry a 4-20ma signal of accurate meaningful value. Likewise it is robust enough to power smart transmitters at a distance such as those tha… --- ## [How to do Hardware Configuration on SIEMENS S7- 300 & S7-400?](https://forumautomation.com/t/how-to-do-hardware-configuration-on-siemens-s7-300-s7-400/9036)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [December 31, 2020, 4:51am UTC](https://forumautomation.com/t/how-to-do-hardware-configuration-on-siemens-s7-300-s7-400/9036 "2020-12-31T04:51:51Z")
An Overview of S7-300 It is a bus linked platform (a serial connector to all modules) This is mini modular PLC for the low and mid-range applications Can be expand the I/O without any issues when the tasks increase bu… --- ## [How to crack a Mitsubishi fx3u PLC password](https://forumautomation.com/t/how-to-crack-a-mitsubishi-fx3u-plc-password/1127)
**Author:** [@shashankspark](https://forumautomation.com/u/shashankspark)\ **Replies:** 0\ **Last updated:** [June 29, 2016, 9:39am UTC](https://forumautomation.com/t/how-to-crack-a-mitsubishi-fx3u-plc-password/1127 "2016-06-29T09:39:19Z")
How to crack a Mitsubishi fx3u PLC password --- ## [How to start a new program in Siemens s7 1200 PLC?](https://forumautomation.com/t/how-to-start-a-new-program-in-siemens-s7-1200-plc/2501)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 23, 2017, 1:48pm UTC](https://forumautomation.com/t/how-to-start-a-new-program-in-siemens-s7-1200-plc/2501 "2017-10-23T13:48:48Z")
Let’s look how to start a new program in a Siemens s7 1200 PLC. Software used - TIA portal. A trial version of TIA portal can be downloaded from the following link : https://support.industry.siemens.com/cs/document/109… --- ## [What are the different operating modes in PLC?](https://forumautomation.com/t/what-are-the-different-operating-modes-in-plc/2489)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [October 23, 2024, 3:29pm UTC](https://forumautomation.com/t/what-are-the-different-operating-modes-in-plc/2489 "2024-10-23T15:29:28Z")
There are basically two modes of operation for plc processors program mode and variations of run mode. Number of modes changes with the manufacturer. There are key switches shown above that allow selecting the modes. … --- ## [PLC ladder Logic for Failsafe alarm system](https://forumautomation.com/t/plc-ladder-logic-for-failsafe-alarm-system/6477)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [May 31, 2019, 4:50pm UTC](https://forumautomation.com/t/plc-ladder-logic-for-failsafe-alarm-system/6477 "2019-05-31T16:50:44Z")
An alarm system can be built in different ways with using an electromagnetic relay or by using solid-state gates. Here we discussing the correct way of ladder logic program using relay logic. Simple relay logic program… --- ## [Fault handling method for PLC, Control Fault Handler](https://forumautomation.com/t/fault-handling-method-for-plc-control-fault-handler/2962)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 12, 2018, 8:30pm UTC](https://forumautomation.com/t/fault-handling-method-for-plc-control-fault-handler/2962 "2018-01-12T20:30:02Z")
\##What is Control Fault Handler? A fault condition can stop a PLC. If the PLC is controlling a dangerous process this could lead to significant damage to personnel and equipment. There are two types of faults that occ… --- ## [Introduction to TIA portal Siemens, for beginners](https://forumautomation.com/t/introduction-to-tia-portal-siemens-for-beginners/2511)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 3\ **Last updated:** [December 3, 2018, 5:37am UTC](https://forumautomation.com/t/introduction-to-tia-portal-siemens-for-beginners/2511 "2018-12-03T05:37:00Z")
To help beginners, let’s look, how to start a program in Siemens PLC. Select the TIA portal from your desktop. On the starting screen, you can see Open existing project, Create new project, Migrate project, installe… --- ## [What are High Speed inputs in PLC?](https://forumautomation.com/t/what-are-high-speed-inputs-in-plc/9819)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [September 4, 2021, 1:29pm UTC](https://forumautomation.com/t/what-are-high-speed-inputs-in-plc/9819 "2021-09-04T13:29:27Z")
High Speed inputs in PLC PLC has a characteristic of counter embedded in its software program library. A counter is not anything however a characteristic that counts things. For example, if we assign a sensor to a virtu… --- ## [PLC Programming :Introduction to Statement list](https://forumautomation.com/t/plc-programming-introduction-to-statement-list/296)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [May 26, 2015, 8:40am UTC](https://forumautomation.com/t/plc-programming-introduction-to-statement-list/296 "2015-05-26T08:40:42Z")
What is Statement List? Statement List (STL) is a textual programming language that can be used to create the code section of logic blocks. Its syntax for statements is similar to assembler language and consists of inst… --- ## [How to access a Siemens PLC from internet](https://forumautomation.com/t/how-to-access-a-siemens-plc-from-internet/3099)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 2\ **Last updated:** [March 30, 2020, 11:45am UTC](https://forumautomation.com/t/how-to-access-a-siemens-plc-from-internet/3099 "2020-03-30T11:45:34Z")
We can access the Siemens PLC through the internet. It is a useful arrangement that one can easily access the PLC system when they are offsite, he can easily stop/start any program if he is available with an internet acc… --- ## [Why PLCs are used in Industries? Basic advantages of using PLC](https://forumautomation.com/t/why-plcs-are-used-in-industries-basic-advantages-of-using-plc/6478)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [June 1, 2019, 5:04pm UTC](https://forumautomation.com/t/why-plcs-are-used-in-industries-basic-advantages-of-using-plc/6478 "2019-06-01T17:04:32Z")
The use of PLCs in the industry has become a necessity, especially to replace the wiring system and relay system that is still used in the previous system. Users are preferring PLC because of the many advantages and bene… --- ## [PLC tutorial - Compare instructions](https://forumautomation.com/t/plc-tutorial-compare-instructions/4935)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 15, 2018, 12:22pm UTC](https://forumautomation.com/t/plc-tutorial-compare-instructions/4935 "2018-10-15T12:22:29Z")
What are compare instructions? These are input instructions that test the relationship between two values from two different sources. A compare instruction specifically tests the following sources: Source A: a word add… --- ## [Master control relay (MCR) in Ladder logic](https://forumautomation.com/t/master-control-relay-mcr-in-ladder-logic/2955)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 11, 2018, 9:29pm UTC](https://forumautomation.com/t/master-control-relay-mcr-in-ladder-logic/2955 "2018-01-11T21:29:07Z")
\##What is Master Control Relay (MCR)? In an electrical circuit, Master control relays are used to shut down a section of an electrical system. In ladder logic, MCR is used to turn ON one section of a programming line.… --- ## [PLC in comparison with other control systems](https://forumautomation.com/t/plc-in-comparison-with-other-control-systems/4398)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [August 16, 2018, 5:39pm UTC](https://forumautomation.com/t/plc-in-comparison-with-other-control-systems/4398 "2018-08-16T17:39:50Z")
PLC vs Relay control system: The logic function is produced by connecting the input and output contacts. The relay logic provides this contact automatically. Combinations of various logic elements may be used to create f… --- ## [What is PLC Latching?](https://forumautomation.com/t/what-is-plc-latching/9753)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 1\ **Last updated:** [August 23, 2021, 8:54am UTC](https://forumautomation.com/t/what-is-plc-latching/9753 "2021-08-23T08:54:13Z")
What is Latch? The latch is used to keep an output active even when the input is turned off. In some industries, such a situation is required. A motor, for example, can be started by pressing a push button switch. Desp… --- ## [How to select a PLC? List of PLC manufacturers](https://forumautomation.com/t/how-to-select-a-plc-list-of-plc-manufacturers/5515)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [April 23, 2019, 10:36am UTC](https://forumautomation.com/t/how-to-select-a-plc-list-of-plc-manufacturers/5515 "2019-04-23T10:36:44Z")
! After designing the process and equipments we have to choose the right controller. For selecting a PLC controller first step, we have to choose the type of PLC based on the following criteria. Criteria for selectin… --- ## [PLC program for Motor control in Ladder logic](https://forumautomation.com/t/plc-program-for-motor-control-in-ladder-logic/5396)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [December 5, 2018, 2:14pm UTC](https://forumautomation.com/t/plc-program-for-motor-control-in-ladder-logic/5396 "2018-12-05T14:14:29Z")
Ladder logic program for motor control is explained below. There are two motor M1 and M2 one allows forward rotation and the other one allows reverse rotation. To keep the motor running even after the operator removed i… --- ## [Instruction list programming tutorial | Basic Ladder logic program converted to Instruction list program, used in Micrologix](https://forumautomation.com/t/instruction-list-programming-tutorial-basic-ladder-logic-program-converted-to-instruction-list-program-used-in-micrologix/2666)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [March 6, 2021, 9:04am UTC](https://forumautomation.com/t/instruction-list-programming-tutorial-basic-ladder-logic-program-converted-to-instruction-list-program-used-in-micrologix/2666 "2021-03-06T09:04:58Z")
Ladder diagrams are graphical language and Instruction list is different, Allen Bradley Micrologix software uses Instruction list as the programming language. Basic ladder logic instruction is converted to Instruction li… --- ## [Interview Question Allen Bradly - RSlogix 500 Programming Basics- Data files](https://forumautomation.com/t/interview-question-allen-bradly-rslogix-500-programming-basics-data-files/421)
**Author:** [@automate](https://forumautomation.com/u/automate)\ **Replies:** 0\ **Last updated:** [May 10, 2015, 6:12am UTC](https://forumautomation.com/t/interview-question-allen-bradly-rslogix-500-programming-basics-data-files/421 "2015-05-10T06:12:12Z")
What are the data files used in RSlogix 500 (Allen Bradly ) PLC programming ? O0 - Output I1 - Input S2- Status B3 - Binary T4-Timer C5 - Counter R6-Control N7-Integer F8-Float --- ## [STEP 7 PLC Programming: DATA types used in Siemens PLC](https://forumautomation.com/t/step-7-plc-programming-data-types-used-in-siemens-plc/295)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 2\ **Last updated:** [August 2, 2015, 8:39am UTC](https://forumautomation.com/t/step-7-plc-programming-data-types-used-in-siemens-plc/295 "2015-08-02T08:39:59Z")
Introduction to Data Types and Parameter Types All the data in a user program must be identified by a data type. The following data types are available: • Elementary data types provided by STEP 7 • Complex data types … --- ## [PLC Troubleshooting](https://forumautomation.com/t/plc-troubleshooting/5535)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [September 9, 2024, 7:22am UTC](https://forumautomation.com/t/plc-troubleshooting/5535 "2024-09-09T07:22:12Z")
To proceed the basics of PLC troubleshooting. it is assumed that the analyzed PLC system was working correctly at some time in the recent past, so the problems of debugging the program and wiring errors that are more typ… --- ## [Details of free HMI software for learning HMI programming?](https://forumautomation.com/t/details-of-free-hmi-software-for-learning-hmi-programming/191)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [December 9, 2014, 12:49am UTC](https://forumautomation.com/t/details-of-free-hmi-software-for-learning-hmi-programming/191 "2014-12-09T00:49:12Z")
Could you please help me to find out the free HMI (Human machine Interface) programming software?? --- ## [How is to implement ON/OFF Temperature control using ladder logic?](https://forumautomation.com/t/how-is-to-implement-on-off-temperature-control-using-ladder-logic/2502)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 23, 2017, 6:55pm UTC](https://forumautomation.com/t/how-is-to-implement-on-off-temperature-control-using-ladder-logic/2502 "2017-10-23T18:55:00Z")
ON/OFF Control system is a commonly used method to control temperature. Comparison instructions, that are Less than or equal and Greater than or equal are set to control the temperature range. A Less than or equal logic… --- ## [Top 5 free PLC simulators for android](https://forumautomation.com/t/top-5-free-plc-simulators-for-android/3120)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [February 9, 2018, 6:31pm UTC](https://forumautomation.com/t/top-5-free-plc-simulators-for-android/3120 "2018-02-09T18:31:55Z")
There is a number of PLC simulators available for Android users. PLC simulators are used to create and edit ladder logic, thus to study the PLC ladder logic. To stimulate the ladder logic in the system there is no need f… --- ## [PLC - different types of PLC](https://forumautomation.com/t/plc-different-types-of-plc/4380)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [August 14, 2018, 2:09pm UTC](https://forumautomation.com/t/plc-different-types-of-plc/4380 "2018-08-14T14:09:20Z")
We can choose different types of PLCs based on their function, I/O module and the structure of the PLC. There are two categories in classification: Classification by I/O modules. Classification by application ranges… [Next page](https://forumautomation.com/c/plc-programmable-logic-controllers/6.md?page=1&per_page=50)