0
 



PLC


RANGE
S7-400

HIGH END RANGE/MEDIUM RANGE
S7-300
MID AND LOW END PERFORMANCE RANGE
S7-200

MICRO PLC'S

SIMATIC S7-300 COMPONENTS




S.No.

COMPONENT


FUNCTION

1.
Rail
Accomodates the S7-300 modules



2.
Power Supply (PS)
Converts the power system voltage (120/230VAC) into 24VDC for the S7-300 and load power supply for 24 VDC load circuits.



3.
CPU
Executes the user program, provides the 5V supply
For the S7-300 backplane bus, communicates with other CPU's or with a programming device via the MPI (Multi Point Interface).



4.
Signal Modules(SM)- DI,DO, AI,AO
Match different process signal levels to the internal signal level of S7-300



5.
Function Modules (FMs)
For time critical and memory intensive process signal processing tasks eg. Closed loop control



6.
Communication Processor (CP)
Relieves the CPU of communication tasks eg-CP 342-5 DP for connection to SINEC L2-DP.



7.
Interface Module (IM)
Interconnects the individual tiers of an S7-300



8.
Sinec L2 cable with LAN connector
Interconnects CPUs and PCs



9.
Programmer Cable
Connects a CPU to a programming device



10.
RS 485 Repeater
Interfaces the S7-300 over large distances to other S7-300s or programming devices  



Overview of STEP 7

What is STEP 7?
·         STEP 7 is the standard software package used for configuring and programming SIMATIC programmable logic controllers. It is part of the SIMATIC industry software.

Basic Tasks
When you create an automation solution with STEP 7, there are a series of basic tasks. The following figure shows the tasks that need to be performed for most projects and assigns them to a basic procedure. 

Alternative Procedures
As shown in the figure above, you have two alternative procedures:
  • You can configure the hardware first and then program the blocks.
  • You can, however, program the blocks first without configuring the hardware. This is recommended for service and maintenance work, for example, to integrate programmed blocks into in an existing project.
Brief Description of the Individual Steps
  • Installation and authorization
    The first time you use STEP 7, install it and transfer the authorization from diskette to the hard disk
  • Plan your controller
    Before you work with STEP 7, plan your automation solution from dividing the process into individual tasks to creating a configuration diagram Design the program structure
    Turn the tasks described in the draft of your controller design into a program structure using the blocks available in STEP 7
  • Start STEP 7
    You start STEP 7 from the Windows 95/98/NT user interface
  • Create a project structure
    A project is like a folder in which all data are stored in a hierarchical structure and are available to you at any time. After you have created a project, all other tasks are executed in this project Configure a station
    When you configure the station you specify the programmable controller you want to use; for example, SIMATIC 300, SIMATIC 400
  • Configure hardware
    When you configure the hardware you specify in a configuration table which modules you want to use for your automation solution and which addresses are to be used to access the modules from the user program. The properties of the modules can also be assigned using
  • Configure networks and communication connections
    The basis for communication is a pre-configured network. For this, you will need to create the subnets required for your automation networks, set the subnet properties, and set the network connection properties and any communication connections required for the networked stations
  • Define symbols
    You can define local or shared symbols, which have more descriptive names, in a symbol table to use instead of absolute addresses in your user program
  • Create the program
    Using one of the available programming languages create a program linked to a module or independent of a module and store it as blocks, source files, or charts
  • S7 only: generate and evaluate reference data
    You can make use of these reference data to make debugging and modifying your user program easier
  • Configure messages
    You create block-related messages, for example, with their texts and attributes. Using the transfer program you transfer the message configuration data created to the operator interface system database (for example, SIMATIC WinCC, SIMATIC ProTool)
  • Configure operator control and monitoring variables
    You create operator control and monitoring variables once in STEP 7 and assign them the required attributes. Using the transfer program you transfer the operator control and monitoring variables created to the database of the operator interface system WinCC
  • Download programs to the programmable controller
    S7 only: after all configuration, parameter assignment, and programming tasks are completed, you can download your entire user program or individual blocks from it to the programmable controller (programmable module for your hardware solution).
  • Test programs
    S7 only: for testing you can either display the values of variables from your user program or a CPU, assign values to the variables, and create a variable table for the variables that you want to display or modify
  • Monitor operation, diagnose hardware
    You determine the cause of a module fault by displaying online information about a module. You determine the causes for errors in user program processing with the help of the diagnostic buffer and the stack contents. You can also check whether a user program can run on a particular CPU
  • Document the plant
    After you have created a project/plant, it makes sense to produce clear documentation of the project data to make further editing of the project and any service activities easier

Labels

Actuator Sensor-interface Address Negative Edge Detection Address Positive Edge Detection ADDRESSING ANALOG INPUTS ANALOG OUTPUTS AND Logic Operation AS-i AS-i configuration Assign Authorizations Automation License Manager BASICS Bit Bit Configuration Bit Logic Instructions Block By-passing CiR CiR Modules CiR Objects communication COMPARISON Components Configuration Configuring Connections Conversion Converting Counter CP 343-2 P CP 443-5 Ext CPU CPU 412-1 CPU 412-2 DP CPU 412-2 PCI CPU 414-2 DP CPU 414-3 DP CPU 414-4 H CPU 416-2 DP CPU 416-2 PCI CPU 416-3 DP CPU 416F-2 CPU 417-4 CPU 417-4 H Data Block DI/DO MODULES Diagnosing Diagnosis DIGITAL INPUTS DIGITAL OUTPUTS Downloading DP master English Mnemonics ET 200M Exclusive OR Logic Operation Extended pulse timer fail-safe modules fault FBD Floating- Point Floating-Point Math FUNCTION MODULES German Mnemonics Hardware hmi Input Insert Binary Input install Instructions Integer Math INTERFACE MODULES Jump License License Keys Load Memory Master Control Relay Memory Areas Memory Reset Midline Output Modifying MODULES monitoring variables Move NEG Negate Binary Input Negative RLO Edge Detection Networks Off-delay timer On-delay timer Operating systems OR Logic Operation Output PID Control PLC POS position decoder Positive RLO Edge Detection PROFIBUS Program Control programm Programming Pulse timer RELAY OUTPUTS Remote Reset Output Reset_Set Flip Flop Retentive on-delay timer Rotate RS S5 File S7 Communications S7-300 S7-400 SAVE Save RLO to BR Memory SCADA Set Output Set_Reset Flip Flop Shift siemens SIMATIC SIMATIC Manager Slaves Software SR STATEMENT Status Bit STEP 7 stop mode Time Base Time Value Timer Timer Cell TRAINING MODULE Units Upgrading UPLOADING WinLC RTX Word Logic Work Memory XOR