siemens s7-300c.ppt

Automation and Drives

A&D BD/AS, Slide 1S7-300 Compact

Totally Integrated Automation

SIMATICS7-300

The universal, small control system supplemented by new, compact CPUs



SIMATIC S7-300 in the system family

Upper and midperformance rangeS7-400

Lower and midperformance range

S7-300

Bottom performance rangeS7-200

+ Programming devices + STEP 7 software+ Communication+ HMI

S7-300 - the universal, small control system for versatile applications in automation engineering

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



The new S7-300 compact CPUs

A strong team 3 basic types:

With different memory sizes and performances

312C: 16 Kbyte

313C: 32 Kbyte

314C: 48 Kbyte

The versions differ with respect to

- I/Os- Onboard interfaces- Process functions

312C

313C

313C-2 DP313C-2 PtP

314C-2 DP314C-2 PtP

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



Dimensions and design

Onboard I/Os:

Integral interfaces:

Max. design:

DI/DO

MPI

1 tier

DI/DO + AI/AO

MPI

4 tiers

DI/DO

MPI + PtP/DP

4 tiers

DI/DO + AI/AO

MPI + PtP/DP

4 tiers

312C

80 mm

313C

120 mm

313C-2 PtP313C-2 DP

120 mm 120 mm

314C-2 PtP314C-2 DP

125 mm

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



Memory, performance and quantity breakdown

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC 312C 313C 314C

Main memory 16 kB 32 kB 48 kB

Statements 5 k 10 k 16 k

Loading memory plug-in 64k-4MB plug-in 64k-4MB plug-in 64k-4MB

Instruction runtime min. 0.2 µs min. 0.1 µs min. 0.1 µs

Alarm response time 800 µs 400 µs 400 µs

Bit memories 1024 2048 2048

Timers / counters 128 / 128 256 / 256 256 / 256

Address space I/O 1024 / 1024 byte 1024 / 1024 byte 1024 / 1024 byte

No. of digital channels 266 1000 1000

No. analog chann. I/O 64 / 64 248 / 248 248 / 248



Integral I/Os - summary

Low-cost onboard I/O channels for universal use

Every digital input can be used as an alarm input

Analog inputs can also be used as digital inputs

* Additional input for resistance measurement

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC

312C 313C 314C

313C 313C-2 PtP / DP 314C-2 PtP / DP

Number of DIs 10 24 16 24

Number of DOs 6 16 16 16

Number of AIs -/- 4 + 1* -/- 4 + 1*

Number of AOs -/- 2 -/- 2



Integral digital I/Os

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC

Digitalinputs

Digitaloutputs

Rated voltage DC 24 V DC 24 V

Permissible range DC 20.4 - 28.8 V DC 20.4 - 28.8 V

Current range --- 0.5 A

Input delay 0.1/0.5/3/15 ms ---

Switch-off delay --- 2 ms

Electrical isolation from backplane bus

yes yes

Groups of 16 8

Max. frequency --- 100 Hz



Integral analog I/Os

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC

Analoginputs

Analogoutputs

Measuring ranges

Voltage ±10V; 0..10V ±10V; 0..10V

Current ±20mA; 0/4..20mA

±20mA; 0/4..20mA

Resolution 11 bits+sign 11 bits+sign

Filter (50/60 Hz) selectable ---

Input delay 5 ms ---

Output delay --- 1,2 ms

Electrical isolation from backplane bus

yes yes



Summary of process functions

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC312C 313C 314C

Counting

Connectable sources

Incremental encoder, pulse generator with direction signal



Number of channels 2 3 4

Cut-off frequency 10 kHz 30 kHz 60 kHz

Frequency measurem.

yes yes yes

PWM

Number of outputs 2 3 4

Cut-off frequency 2.5 kHz 2.5 kHz 2.5 kHz

Positioning no no 1 axis

Control - PID PID



Integral counters

Integral counters in all compact CPUs

- Recording of pulse and incremental encodersignals (DC 24V)

- Forward/reverse with reference values whichcan be changed during operation

- 10 - 60 kHz (depending on CPU)

Various operating modes possible

- Single counting (e.g. filling, dosing)

- Periodic counting (e.g. recording of angle)

- Counting with gate control (e.g. length measurement)

Frequency measurement

- Counting with fixed time base

t

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



PWM outputs

U

t

Pulse outputs on all compact CPUs

- Direct control of valves, actuators, switchgear, heaters etc. (DC 24 V/ 0.5 A)

- Period and pulse/pause ratio can be changed during operation

- 2.5 kHz switching frequency, up to 4 outputs (depending on CPU)

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



Simple motion controlwithout additional components

Low-price Since no additional modules required

Optimum memory requirements and runtime No additional programming requirements

since function is component of operating system

Flexible Parameters (delay, acceleration etc.) can

be changed for each travel Various operating modes selectable:

absolute or relative positioning, inching etc.

Simple Prepared functionality can be linked into

application program using standard blocks

v

t

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



Summary of communications

312C313C 314C-2

PtP

313C-2 PtP 314C-2

DP

313C-2 DP

MPI

Point-to-point

PROFIBUSDP

Interface present on all CPUs - networking of CPU, programming device and OPs

Low-cost communications without additional HW - extremely simple configuring

Communication with up to 7 OPs simultaneously (depending on type of CPU) Serial onboard

interface

Data exchange e.g. with devices from other vendors

Fast, cyclic data exchange

High data security

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



On every CPU:multipoint interface MPI

Data exchange: 187.5 kbit/s

Up to 32 bus stations, up to 12 active connections per CPU

Communications functions:- Programming device/operator

panel functions

- Global data communications without programming input

- S7 basic communication up to 76 byte

- S7 communication (only server)

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC

Low-cost communication without additional hardware



Point-to-point interface (RS422/485)Connection of non-system components

CPU 313C-2 PtP / 314C-2 PtP

Transmission physics:

- RS 422/485 (X.27)

- Transmission rate: up to 19.2 / 38.4 kbit/s (half duplex/full duplex)

Protocols:

- ASCII

- 3964(R)

- RK 512 - (only 314C-2 PtP)

PCs, computers,programming devices

SIMATIC S5

Robotcontrols

Scanners,bar code readers,ID systems

Weighing systems,controllers

Opto electronics S7-300 S7-300 C

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



CPU 313C-2 DP, 314C-2 DP, integral PROFIBUS-DP

Versatile use:master or slave function

Data exchange at 12 Mbit/s

Up to 32 DP stationsto master interface

Max. distance 23 km using FO

Communications functions:- All programming device/OP

functions

- PROFIBUS-DP

PG

PROCES S FIELD BUS

SIEMENS

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC

No additional module or software required!



SIMATIC Micro Memory CardMany functions - small format

Can be used in every S7-300 compact CPU

Functions as program memory, non-volatile and resistant to overall reset; transportable for simple program updating

Functions as loading memory - flexible as result of selectable MMC sized between 64kB and 4MB

Permits project storage on CPU - save your complete project on the MMC

Access to the MMC during RUN mode of CPU

- Load data into CPU (recipe)

- Write data onto MMC (archive)

MMC buffers your data in the main memory in event of power failure

no backup battery required

MMC is required to operate the compact CPUs

Overview

Comparison

I/O‘s

Process Functions

Communication

MMC



The universal, small control system with emphasis on production engineering

Totally IntegratedAutomationwith

SIMATICS7-300

siemens s7-300c.ppt

Engineering