PLC PROGRAMS

Basic PLC Programs

How to back up Mitsubishi PLC

Back up Allen Bradley PLC

Diagnosing Hardware and Troubleshooting Siemens S7 PLC

Uninstalling STEP 7

How to program Mitsubishi PLC.

Hotw to Setting the PG/PC Interface

Installing STEP 7

Automation License Manager

Siemens S7 License Keys

What is Human Machine Interface ( HMI ) ?

What is Step 7

Selecting a Memory Module for SLC 500

DH-485 Comunication Cable and Isolated Link Couplerm

Installing the DH-485 Network

Types of RS-232 Connectors

RS-232 Communication for SLC500

Replacing Battery of Allen Bradley PLC.

Key switch for Allen Bradley PLC

Selecting Modular Processors for SLC 500

Allen Bradley Device Network

PLC Address

RSLinx lite

Mitsubishi PLC Programs Download

PLC Programming History

Why PLC need for Automation system

2020-05-11T07:29:00.000-07:00

Input signal from Input device will entrance to PLC by Input module. After that PLC will process Input signal with Processor memory. Then PLC will transfer Output signal to Output device by Output module.

Basic componant of PLC Programs .

1. CPU ( Central Processor Module )
Process software application in ROM/RAM. Some application depend on Brand or Type.

2. Memory Unit
- ROM : Storage functions of the PLC Programs, Have battery to back up.
- RAM : Can be divided into EPROM, which will require special equipment to write and delete

3. I/O Unit
- Digital input module : Receive digital signal from Input device. ( 24VDC/VAC, 110V, 220V )
- Digital output module : Send digital signal to Output device. ( 24VDC/VAC, 110V, 220V )
- Analog input modle : Receive analog signal from Input device. ( 0-10VDC, 4-20Ma )
- Analog output module : Send analog signal to Output device. ( 0-10VDC, 4-20Ma )

4. Power supply
To supply electricity to PLC Programs device.

5. Base module
To connect all PLC Programs device.

2011-05-19T05:27:00.000-07:00

The most important of PLC Programs is PLC back up. This article will show you step by step to back up Misubishi PLC FX series.

1. Interface Mitsubishi PLC with PC by interface cable. ( RS232, USB, Etc )

2. Open GX Developer Software.
- Select online -> Read from PLC.

3. Select Main + PLC parameter -> Execute -> Yes
- To back up Main ladder and PLC parameter

4. Waiting for read PLC Programs data -> OK

5. Open Project -> Save as -> Create name for your PLC Programs back up -> Save.

Tag : PLC Programs; How to back up Mitsubishi PLC; Back up Mitsubishi PLC; How to Back up PLC; Back up PLC FX Series

2011-04-23T07:52:00.000-07:00

Back up PLC Programs for Allen Bradley ( SLC 500 )

1. Connect PLC with your PC by RSLinx lite.
2. Open RSLogix500 PLC Programs and insert PLC Licence Disc.
Note : System will show "Fatal Error" if don't have Licence disc.

3. Open PLC Programs file by click File and open.

4. Select Comm at Toolbar and choose System Comm..

5. Switch PLC key to Program mode.
- You need to select Program mode when Upload and Download PLC Programs.

6. Confirm Download by select Yes.

2011-01-07T23:09:00.000-08:00

How to Locate Faults

1. Open the online window for the project with the menu command View >
Online.
2. Open all the stations so that the programmable modules configured in them
are visible.
3. Check to see which CPU is displaying a diagnostics symbol indicating an error
or fault. You can open the help page with an explanation of the diagnostics
symbols using the F1 key.
4. Select the station that you want to examine.
5. Select the menu command PLC > Diagnostics/Settings > Module
Information to display the module information for the CPU in this station.
6. Select the menu command PLC > Diagnostics/Settings > Diagnose
Hardware to display the "quick view" with the CPU and the failed modules in
this station. The display of the quick view is set as default (menu command
Option > Customize, "View" tab).
7. Select a faulty module in the quick view.
8. Click the "Module Information" button to obtain the information on this module.
9. Click the "Open Station Online" button in the quick view to display the
diagnostic view. The diagnostic view contains all the modules in the station in
their slot order.
10. Double-click a module in the diagnostic view in order to display its module
information. In this way, you can also obtain information for those modules that
are not faulty and therefore not displayed in the quick view.
You do not necessarily have to carry out all of the steps; you can stop as soon as
you have obtained the diagnostic information you require.

2011-01-05T07:57:00.000-08:00

You can remove Step 7 by follow this instruction.

1. Open control panel and Double-click at ”Add/Remove Programs to start the Windows software installation dialog box.
2. Select STEP 7 entry on the displayed list of installed software. Click the
button to ”Add/Remove" the software.
3. If the ”Remove Shared File" dialog box appears, click the ”No" button if you are
uncertain.

2011-01-02T06:40:00.000-08:00

MITSUBISHI PLC FX Series

1. Start GX Developer Solfware

Project Menu
- Select new project for create new PLC Programs.
- Select open project for open software file.

2. Select PLC series and Type.

3. Start to program PLC.

4. PLC Programs.

- Convert program (F4) to confirm with PLC.

5. Programming test.

- Click toolbar and select Start Ladder Logic test. Then PLC will simulate program.
- You can Force program by Shift + Enter

Tag : PLC Programs; How to program Mitsubishi PLC.; Program Mitsubishi PLC; Program PLC; Program PLC FX Series ; Program FX Series; How to Program PLC; How to program FX Series

2010-12-19T05:44:00.000-08:00

How to configure the communication between the PG/PC and the PLC? During
installation, you are displayed a dialog for assigning parameters to the PG/PC
interface. You can also open this dialog box after installation, by calling the
program ”Setting PG/PC Interface" in the STEP 7 program group. This enables you
to modify the interface parameters at a later time, independently of the installation.
Basic Procedure

To operate an interface, you will require the following:
• Configurations in the operating system
• A suitable interface configuration
If you are using a PC with an MPI card or communications processors (CP), you
should check the interrupt and address assignments in the Windows "Control
Panel" to ensure that there are no interrupt conflicts and no address areas overlap.
In Windows 2000 and Windows XP, the ISA component MPI-ISA card is no longer
supported and therefore no longer offered for installation.
In order to make it easier to assign parameters to the programming device/PC
interface, a dialog box will display a selection list of default basic parameter sets
(interface configurations).
Assigning Parameters to the PG/PC Interface
Procedure (Detail are found in the Online Help):
1. Double-click on ”Setting PG/PC Interface" in the ”Control Panel" of Windows.
2. Set the ”Access Point of Application" to ”S7ONLINE."
3. In the list "Interface parameter set used", select the required interface
parameter set. If the required interface parameter set is not displayed, you
must first install a module or protocol via the ”Select" button. The interface
parameter set is then generated automatically. On plug-and-play systems, you
can not install plug and play CPs manually (CP 5611 and CP 5511). They are
integrated automatically in "Setting PG/PC Interface“ after you have installed
the hardware in your PG/PC.
- If you select an interface which is capable of automatic recognition of
bus parameters (for example, CP 5611 (Auto)), you can connect the
programming device or the PC to the MPI or PROFIBUS without having to
set bus parameters. If the transmission rate is < 187.5 Kbps, there may be
a delay of up to one minute while the bus parameters are read.
Requirement for automatic recognition: Masters who broadcast bus
parameters cyclically are connected to the bus. All new MPI components
do this; for PROFIBUS subnets the cyclic broadcast of bus parameters
must be enabled (default PROFIBUS network setting).
4. If you select an interface which does not automatically recognize the bus
parameters, you can display the properties and adapt them to match the
subnet.

Changes will also be necessary if conflicts with other settings arise (for example,
interrupt or address assignments). In this case, make the appropriate changes with
the hardware recognition and Control Panel in Windows (see below).

2010-11-13T23:44:00.000-08:00

Preparing for Installation

The OS Windows 2000/XP should be started before install software.
• You don't need an external storage medium if the installable STEP 7 software is already stored on the hard disk of the PG.
• To install from CD, Please insert the CD-ROM in the CD-ROM drive of your PC and start to boots.

Begin Installation Program

To install the S7 software, follow as below
1. Insert the CD-ROM and double click ”SETUP.EXE" file.
2. Follow the on-screen step-by-step instructions of the installation program.
The program guides you through all steps of the installation. You can go to the next
step or return to the previous step.

Note: Under installation, the dialog boxes prompt you to make your choice from the
displayed options. The following notes will advice you to quickly and easily find the
correct answers.

2010-10-17T08:14:00.000-07:00

To use STEP 7 PLC programs software, you require a product-specific license key.
Starting with STEP 7 V5.3, this key is installed with the Automation
License Manager.

The Automation License Manager is a software product from Siemens AG. It is
used to manage the license keys (license modules) for all systems.

The Automation License Manager is located in the following places:
• On the installation device for a software product that's request a license key
• On a separate installation device
-From storage device such as Diskket, Thumb drive.
• As a download from the Internet page of A&D Customer Support at Siemens
AG

The Automation License Manager has its own integrated online help. To obtain
help after the license manager is installed, press F1 or select the Help > Help on
License Manager. This online help contains detailed information on the
functionality and operation of the Automation License Manager.

2010-10-13T07:58:00.000-07:00

The license key is the technical representation (an electronic "license stamp") of
alicense to use software.

SIEMENS AG issues a license key for all of its software that is protected by a
license. When the computer has been started, such software can only be used in
accordance with the applicable license and terms of use after the presence of a
valid license key has been verified.

License Keys can be stored and transferred in various types of storage
devices as below:
• In key diskettes
• In local hard disk
• On network hard disk
If software products don't have license, you can then determine which license key is needed and order it as required.
For further information on obtaining and using license keys, please refer to the
online help for the Automation License Manager.

Note: You can move License Keys from one storage device to other device by Automation License manager software.

2010-10-05T09:44:00.000-07:00

Human Machine Interface (HMI) is a software especially designed for operator
control and monitoring in SIMATIC PLC Programs.

• The open process visualization system SIMATIC WinCC is a standard operator
interface with all the important operator control and monitoring functions which
can be used in any branch of industry and with any technology.

• SIMATIC ProTool and SIMATIC ProTool/Lite are modern tools for configuring
SIMATIC operator panels (OPs) and SIMATIC C7 compact devices.

• ProAgent is a diagnostics software that acquires information on the location
and cause of errors in plants and machinery and thus offers fast and aimed
process diagnostics.

2010-10-03T05:40:00.000-07:00

STEP 7 is the standard software package used for configuring and programming
SIMATIC programmable logic controllers. It is part of the SIMATIC industry
software. There are the following versions of the STEP 7 Standard package

• STEP 7 Micro/DOS and STEP 7 Micro/Win for simpler stand-alone applications
on the SIMATIC S7-200.

• STEP 7 for applications on SIMATIC S7-300/S7-400,SIMATIC M7-300/M7-400, and SIMATIC C7 with a wider range of functions:
- Can be extended as an option by the software products in the SIMATIC
Industry Software (see also Extended Uses of the STEP 7 Standard
Package)
- Opportunity of assigning parameters to function modules and
communications processors
- Forcing and multicomputing mode
- Global data communication
- Event-driven data transfer using communication function blocks
- Configuring connections
STEP 7 is the subject of this documentation, STEP 7 Micro is described in the "STEP 7 Micro/DOS" documentation.

2010-08-15T09:43:00.000-07:00

What is EPROM ?
The memory module for the SLC 5/03, SLC 5/04, and SLC 5/05 processors is called Flash EPROM (Flash Erasable Programmable Read Only Memory). Flash EPROMs combine the programming versatility of EEPROMs with the security precautions of UVPROMs. This means that you have the option of leaving your EPROM programs write protected or unprotected. Write protect the EPROM using either your software or a PROM programmer.
The memory modules consist of a Flash EPROM mounted on a circuit board with a connector and plastic housing. There are 2 memory modules available that backup up to 32K or 64K user
memory.

See the table below for details on the Flash EPROM and adapter socket.
Adapter sockets are required when inserting memory modules into commercially available PROM programmer. The memory module fits into the adapter socket and then into a PROM programmer.

1. The 1747-M11 Series A memory module can only be used in either an SLC 5/03 Series A
processor or in an SLC 5/03 Series B processor. The 1747-M11 Series B memory module can
only be used in either an SLC 5/03 OS302 or higher, an SLC 5/04 OS401 or higher, or an
SLC 5/05 processor.
2. The 1747-M12 memory module can only be used in either an SLC 5/03 OS302 or higher, an
SLC 5/04 OS401 or higher, or an SLC 5/05 processor.

Tag : PLC Programs; How to select Memory module; Select PLC Memory ; What is EPROM ; ; Allen Bradley Memory ; ; EPROM SLC500

2010-08-11T07:22:00.000-07:00

The link coupler provides a connection for each node. The isolated link coupler electrically isolates the DH-485 communication interface from the processor and peripheral connections.
Electrical-optical isolation is provided to 1500V.

The suggested DH-485 communication cable is Belden #3106A or #9842 cable. The cable is jacketed and shielded with two twisted wire pairs and a drain wire. One pair provides a balanced signal line, and one wire of the other pair is used for a common reference line between all nodes on the network. The shield reduces the effect of electrostatic noise from the
industrial environment on the network communication.

2010-08-11T07:12:00.000-07:00

What is DH-485 connection

DH-485 network to pass information between devices on the plant floor. The network monitors process parameters, device parameters, device status, process status and application programs to support data acquisition, data monitoring, program upload/download and supervisory control.
The DH-485 network offers:
• interconnection of 32 devices
• multi-master capability
• token passing access control
• the ability to add or remove nodes without disrupting the network
• maximum network length of 1219 m (4000 ft)

Note : The SLC 500 Series A (only) processors set the maximum node address to 31 when power is cycled increasing initialization and response time of the network.

The maximum number of communication devices
SLC 500 fixed and SLC 5/01 processors can be selected by two initiators maximum at the same time. Using more than two initiators to select the same SLC 500 fixed and SLC 5/01 processors at the same time can cause communication timeouts.

To install a DH-485, you need tools to strip shielded cable and connect the cable and terminators isolated link Coupler.
Installing the DH-485 with the following tools (or equivalent):

Tag : DH-485,Install DH-485, what is DH-485, DH-485 connection, How to connect DH-485, Install DH-485

2010-08-09T08:33:00.000-07:00

The figure below show male connectors, and their pinout locations,
for Allen-Bradley devices.

DTE Pinout

Channel 0 is configured as DTE for all SLC 5/03, SLC 5/04, and SLC 5/05 processors. The pinouts are the same as the 9-pin AT port.

DCE Pinout

Devices such as a modem are Types of RS-232 Connectors. The pinouts on these terminals are wired to interface with DTE.
Note : DCE signal names are viewed from a DTE perspective.

Tag : Type of RS-232, DCE Pin out, DTE Pin out, DTE, DCE

2010-08-07T08:59:00.001-07:00

The RS-232 Communication channel on the SLC 5/03, SLC 5/04, and SLC 5/05 processors supports four protocols:
• Full-Duplex DF1 (default)
• Half-Duplex DF1 (SCADA)
• DH-485
• ASCII Communications

The SLC and PLC products detailed in this appendix that communicate over the RS-232 Communication interface also use the DF1 serial communication protocol. DF1 protocol delimits messages, controls message flow, detects and signals errors, and retries after errors are detected.

The SLC 5/03, SLC 5/04, and SLC 5/05 processors can communicate by means of the RS-232 Communication port,
channel 0. Channel 0 supports DF1 full-duplex protocol and DF1 half-duplex master and slave protocol, DH485 protocol , as well as ASCII communications. Refer to your programming software user manual for information on configuring the RS-232 Communication port, channel 0.

Channel 0 provides a minimum of 500V dc isolation between the I/O signals and the logic ground of the SLC 5/03, SLC 5/04, and SLC 5/05 processors. The channel is a 9-pin D-shell. The table below provides a description of each of the pins.

Tag : RS-232 Communication, RS-232 , RS-232 Communication for SLC 500, RS-232 interface, RS-232 Connector

2010-08-05T08:48:00.000-07:00

SLC 5/03, SLC 5/04, or SLC 5/05 processor provides back-up power for RAM by replaceable lithium PLC Battery. This PLC Battery provides back-up for approximately 2 years. A BATT LED on the
will alerts when the PLC Battery voltage was drop under a threshold level.

Note : Please see PLC Battery warning in this pic.

Will safety for your equipment, if replace the lithium PLC Battery follow these steps:

1. Remove power from the SLC 500 power supply.

Note : Do not remove the processor from the SLC 500 chassis until all power is removed from the SLC 500 power supply.

2. Remove the processor from the chassis by pressing the retainer clips at both the top and bottom of the module and slide it out.

3. Unplug the PLC Battery connector. Refer to the figure below for PLC Battery connector location.

Note : PLC Battery can back up Data in RAM at least 30 minutes.

4. Remove the PLC Battery from the retaining clips.

5. Insert a new PLC Battery into the PLC Battery retaining clips.

6. Plug the PLC Battery connector into the socket.

7. Re-insert the module into the SLC 500 chassis.

8. Restore power to the SLC 500 power supply.

Tag : PLC Battery, Replace PLC Battery, SLC 5/04 Battery, SLC 5/05 Battery, SLC 5/03 Battery, Replace Allen Bradley battery, Allen Bradley PLC Battery, PLC Battery

2010-08-03T09:02:00.000-07:00

The SLC 5/03, SLC 5/04, and SLC 5/05 processors include a 3-position Key Switch on the front panel that lets you select one of three modes of operation: Run, Program, and Remote. You can
remove the key in each of the three positions.

Note : The SLC 5/01 and SLC 5/02 processors do not have a Key Switch. Therefore, all modes must be changed via the communication channels.

RUN Position

This position places the processor in the Run mode. The processor
scans/executes the ladder program, monitors input devices, energizes
output devices, and acts on enabled I/O forces. You can only change
the processor mode by changing the Key Switch position. You cannot
perform online program editing.
To change the processor mode to Run, toggle the Key Switch from
PROG or REM to RUN. When the Key Switch is left in the RUN
position, you cannot use a programmer/operator interface device to
change the processor mode.

PROG Position

This position places the processor in the Program mode. The
processor does not scan/execute the ladder program, and the
controller outputs are de-energized. You can perform online
program editing. You can only change the processor mode by
changing the Key Switch position.

To change the processor mode to Program, toggle the Key Switch
from REM or RUN to PROG. When the Key Switch is left in the
PROG position, you cannot use a programmer/operator interface
device to change the processor mode.

REM Position

This position places the processor in the Remote mode: either the
REMote Run, REMote Program, or REMote Test mode. You can
change the processor mode by changing the Key Switch position or by
changing the mode from a programmer/operator interface device.
You can perform online program editing in this position.
To change the processor mode to REM, toggle the Key Switch from
RUN or PROG to REM. When the Key Switch is in the REM position,
you can use a programmer/operator interface device to change the
processor mode.

Tag : Key Switch,Key switch position, PLC Key switch, Allen bradley Key switch

2010-07-31T01:45:00.000-07:00

SLC 500 modular processors are designed to meet a wide range of applications, from small stand-alone to large distributed systems and from simple to complex applications.

Processor Features
Memory size — The SLC 500 modular processors memory is user
configurable for either data storage or program storage. Memory
size ranges from 1K to 64K.

I/O points — The SLC 5/01 processor supports addressing of up to
3940 I/O. The SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05
processors support addressing of 4096 I/O. The SLC 500 modular
processors are supported by over 60 different I/O modules including
digital, analog, and intelligent I/O.

Performance — The SLC 500 modular processors are designed
with throughput performance in mind. The program scan time for a
typical instruction mix ranges from 0.9 ms/K to 8.0 ms/K depending
on the processor. I/O scan times range from 0.25 ms to 2.6 ms
depending on the processor.

Advanced instruction support — The instructions available
depends on the processor used. The following table lists the type of
instruction support offered by the SLC 500 modular processors.

2010-07-31T00:53:00.000-07:00

A Device network connects plant floor devices directly to the control system (e.g., SLC 500 controller) reducing the number of I/O interfaces and wiring associated with a typical hard-wired solution.The DeviceNet communication network is a completely open Device network and has the support of industry’s leading sensor, actuator,
and control manufacturers.

In a typical configuration, the 1747-SDN DeviceNet Scanner acts as an interface between DeviceNet devices and the SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 processors. The scanner communicates with DeviceNet devices over the network to:
• Read inputs from a device
• Write outputs to a device
• Download configuration data
• Monitor a device’s operational status

The scanner communicates with the SLC 500 processors to exchange I/O data. Information exchanged includes:
• Device I/O data
• Status information
• Configuration data

A single scanner (master) can communicate with up to 63 nodes (slaves) on DeviceNet. The SLC system supports multiple scanners if more devices are required to be controlled by a single SLC 500 processor.

DeviceNet Network Length

The DeviceNet network lengths are listed below.

2010-07-06T08:53:00.000-07:00

How to read Basic PLC address
.

EX. For Allen Bradley SLC 500

Input and Output module.

I = Module Type ( I for Input, O for Output )
3 = Slot Number (1-30 )
10 = Terminal Number

Ex.1

2010-06-09T07:49:00.000-07:00

Interface with Rockwell PLC Programs

1. Connect PLC with your PC by interface cable.
2. Open RSLinx software and select RS Who like this Pic.

3. Set PLC driver by right clink at Workstation icon and select Configure Driver.

4. Select auto configure icon. If connection test is OK, This page wil show Auto Configuration Successful.

5. After finshed to configure, you can see PLC icon on right display. If didn't shown, you must Configure driver again.

2010-06-04T10:12:00.000-07:00

How to write Mitsubishi FX-Serie

1. Connect your PC with PLC FX Series by interface cable.
2. Open GX Developer PLC Programs.

3. Select PLC switch to STOP Mode.
- PLC must in STOP mode when download PLC Programs.

4. Select Online -> Write to PLC ….

5. Select Model of PLC to write.

- In this case, I select FXCPU

6. Select Data to write to PLC.

- Parameter and program are necessary to write.

7. Select EXECUTE and Yes.

8. Software will show download status.

9. After finish to write, click OK.

2010-05-15T08:19:00.000-07:00

PLC Programs History

Programmable Logic Controller (PLC) has been initiated by a group of engineers used the General Motor Company in 1968 where the system has many advantages.
1.) Easy to program and Modify it easily.
2.) Easy for maintenance, repair Using nature as a Plug-in module.
3.) System reliability and smaller device size compared with the relay system.
4.) Cost less compared with relays.
Such advantages of the PLC system of widespread interest. Demand of PLC has increased significantly. Technologies in this field has been developing rapidly. From basic logic circuits has become a simple command. As well as to develop and include. counter, timer, shift registers, advance mathematical addition of the Hardware section of the structure has been developed as a memory with large number of input-output that much.
Later, around 1976 have been fabricated devices Remote I / O rack, a device that supports the use of the I / O ์ distant several hundred meters from the main PLC.
Around year 1977, the company Allan-Bradley Corporation has adoption of microprocessor 8080, applications from the PLC has been developed and are available to many levels of her contemporaries. MF 1980 has begun. development Interigent I / O and increase the ability to communicate.
Also in the rung Sen Pat has more modules, such as Analog I / O, PID control, communications, graphic display, addition I / O, additional memory, etc..

Tag : PLC Programs; PLC Program; PLC Programming; PLC Programming History; PLC History

Address = I :3/0

I = Input Type

3 = Slot Number ( Start 0 at CPU )

0 = Terminal Number at Input module.

2010-05-12T07:24:00.000-07:00

Why we need PLC Programs ?

- Easy to maintenance and Trouble shooting
- Reduce machine downtime for modify the system.
- Easy to wiring and keep spare part.
- Easy to modify for machine improvement by online mode.
- More space in control panel.
- System back and change by program load. ( PLC Programs )
- Self diagnostic show error and fault in system.
- Capable for 100I/O, 10,000 Relay and Timer in module.

Tag : PLC Programs; PLC Program; PLC Programming; Why PLC; Why PLC need; What is PLC