Siemens Simatic S7-300 User manual

SIMATIC S7-300
Getting Started for First Time Users
Order No.: 6ZB5310-0NC02-0BA0
04/2007
A5E01094750-01

Safety Guidelines
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to prop-
erty damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning and oper-
ation of a device/system may only be performed by qualified personnel. Within the context of the safety notes in
this documentation qualified persons are defined as persons who are authorized to commission, ground and label
devices, systems and circuits in accordance with established safety practices and standards.
Danger
indicates that death or severe personal injury will result if proper precautions are not taken.
Warning
indicates that death or severe personal injury may result if proper precautions are not taken.
Caution
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
Caution
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
Notice
indicates that an unintended result or situation can occur if the corresponding information is not taken into account.

Prescribed Usage
Note the following:
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this publica-
tion may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the infor-
mation in this publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Warning
This device may only be used for the applications described in the catalog or the technical description and only in
connection with devices or components from other manufacturers which have been approved or recommended by
Siemens. Correct, reliable operation of the product requires proper transport, storage, positioning and assembly as
well as careful operation and maintenance.
Siemens AG
Automation and Drives
Postfach 48 48
90437 NÜRNBERG
GERMANY
Order No. 6ZB5310-0NC02-0BA0
04/2007
Copyright © Siemens AG .
Technical data subject to change

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Contents
1 Welcome. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Preparing the PC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Installing and wiring the hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 What components are required? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Installing the components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Wiring the components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4 Commissioning the hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4 Configuring the control in STEP 7 Lite. . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1 What is a STEP 7 Lite project? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2 Opening a STEP 7 Lite project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3 Reproducing the module configuration in STEP 7 Lite. . . . . . . . . . . . . . . . . . 35
4.4 Establishing the online connection between the PC and CPU 312C . . . . . . . . 41
4.5 Downloading and checking the module configuration to the CPU 312C. . . . . . 42
5 Opening the program on the PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.1 What is a program?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.2 Opening a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6Performingatestrun. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.1 Downloading the project to the CPU 312C . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.2 Starting the test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7 Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8 Additional information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.1 Diagnostics / correction of errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2 Additional documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.3 SIMATIC Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

2
1Welcome

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Welcome to the “S7-300 Getting Started for First Time Users”. Using an example
of a conveyor belt, we will illustrate how easy it is to control a drive motor with an
S7-300. You will use the S7-300 to start the motor, switch the direction of rota-
tion, and then stop the motor again.
To accomplish this, you will perform the following tasks:
• Install the required software.
• Install and wire the required control components.
• Configure the hardware using the STEP 7 Lite software, and download a con-
trol program.
• Start the motor.
The example will take approximately 1 hour to implement, depending on your
prior knowledge.

1Welcome
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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Validity
These instructions apply to the following CPUs:
Prerequisites
You are proficient in working with the Microsoft ® WindowsTM operating system.
You are familiar with the basics of electronics and electrical engineering.
Abbreviation Order no.
You will need a micro
memory card (MMC)
for operation Asoffirmware
version
312C 6ES7312-5BE03-0AB0 X V 2.6
Warning
Dangerous currents and voltages!
Serious bodily injury and damage to machinery and equipment can occur if
you do not observe the safety and accident prevention regulations, e.g.,
IEC 204 (emergency STOP devices).
Operation of an S7-300 in plants or systems is governed by special rules
and regulations, depending on the specific field of application.

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Materials and tools
In order to install the conveyor belt control, you will need the following materials
and tools:
• The S7-300 starter kit contains the following:
Quantity Item Order number
(Siemens)
1 Mounting rail 6ES7390-1AB60-0AA0
1 CPU 312C 6ES7312-5BE03-0AB0
1 SIMATIC Micro Memory Card 6ES7953-8LF11-0AA0
1 Multipin front panel connector with screw-type
contacts
6ES7392-1AM00-0AA0
1 PC Adapter USB with driver software 6ES7972-0CB20-0XA0
1 Manual Collection containing electronic manuals
for the various SIMATIC products
6ES7998-8XC01-8YE0

1Welcome
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SIMATIC S7-300 Getting Started for First Time Users
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• In addition, you will need the following components:
Quantity Item Order number
(Siemens)
1 Power supply 6ES7307-1EA00-0AA0
1 PC with USB interface -
1 STEP 7 Lite V3.0 + Service Pack 2 Can be downloaded free
of charge on the Internet
various M6 screws and nuts (length depends on installa-
tion location) with suitable screwdriver/wrench
Commercially available
1 Screwdrivers with 3.5 mm and 4.5 mm blade
widths
Commercially available
1 Diagonal cutters and wire stripping tool Commercially available
1 Crimp tool Commercially available
X m Cable with 10 mm2cross-section for grounding
the mounting rail and suitable cable lug for M6
screw. Length of cable depends on local condi-
tions
Commercially available
Approxi-
mately 2 m
Flexible cable with 1 mm2cross-section and
suitable ferrules with insulated collar, length
6mm
Commercially available
X m 3-wire flexible network cable (230/120 VAC) with
grounding-type socket plug; length dependent
on local conditions and suitable ferrules with
insulating collar
Commercially available
4 Single-pole momentary contact switch
(24 V, 2 A)
Commercially available
1 Motor, including accessories (optional)
You can find technical specifications for the
CPU 312C in the “CPU 31xC and CPU 31x:
Technical Specifications” Manual available on
the Internet at http://www.siemens.com/automa-
tion/service&support.
Commercially available
Note
You can also use the
CPU 312C with an extra-low
voltage that is safely isolated
from the supply system. Safe
isolation can be achieved, for
example, in accordance with
VDE 0100 Part 410 / HD 384-
4-41 / IEC 364-4-41 or
VDE 0805 / EN 60950 /
IEC 950 or VDE 0106
Part 101.

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SIMATIC S7-300 Getting Started for First Time Users
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2 Preparing the PC

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Installing STEP 7 Lite
In order to create the control program for the drive motor on your PC, you must
install the STEP 7 Lite software. The latest version of STEP 7 Lite including ser-
vice pack can be found on the Internet at:
http://support.automation.siemens.com/WW/view/en/24372175
• Open the installation file and follow the instructions.
Installing the driver for the PC Adapter USB
Use the PC Adapter USB to establish the connection between the CPU 312C
and the PC. The PC Adapter USB connects the USB interface of the PC with the
MPI interface of the CPU 312C, thus enabling communication. In order to use
the PC Adapter USB, you must install the necessary driver.
• Insert the Driver CD for the PC Adaptor USB and follow the instructions.
Note
If the CD does not start up
automatically, you can start
the setup program by double-
clicking the Setup.exe file in
the main directory of the CD.

2 Preparing the PC
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SIMATIC S7-300 Getting Started for First Time Users
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Setting the interface
1. Open the dialog for setting the PG/PC interface.

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SIMATIC S7-300 Getting Started for First Time Users
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2. For the interface, select “PC Adapter(MPI)”. This connection property
enables communication between your PC and the MPI interface of the
CPU 312C.

2 Preparing the PC
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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
3. Configure the connection to the USB interface. This connection property
enables communication between the MPI interface of the CPU 312C and
your PC.
You have installed STEP 7 Lite and the software for the PC Adapter USB and
configured the interfaces between the PC Adapter USB and the CPU 312C.
Next, you will install the control components on the mounting rail.

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14
3 Installing and wiring the hardware

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
3.1 What components are required?
In order to control the conveyor belt, you will need the components shown:
• Power supply for the control components
• CPU 312C with integrated input and output module
• Mounting rail for installing the modules
• Momentary contact switch
• Motor for driving the conveyor belt (optional)
• PC with STEP 7 Lite including Service Pack 2
• PC Adapter USB for connecting the PC with the CPU 312C
Note
If you do not have a motor,
you can still implement the
example. In this case, you will
observe the LEDs on the digi-
tal outputs of the CPU 312C.

3 Installing and
wiring the hardware
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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
3.2 Installing the components
In this section, we show you how to:
• Install and ground the mounting rail
• Install the modules on the mounting rail
• Insert the front panel connector
Installing and grounding the mounting rail
1. Screw the mounting rail to the
subsurface. Use two M6 screws
for this.
2. Connect the mounting rail to the
ground wire.
The prescribed minimum cross-section for the cable to the protective conductor
is 10 mm2.
Note the following information when installing the mounting rail:
• Make sure to maintain a clearance of at least 40 mm above and below the
mounting rail. This is needed to satisfy the requirements for thermal conditions
(heat dissipation and ventilation of the module) and to facilitate the installation
(mounting and removing, wiring).
• If the subsurface is a grounded metal plate or a grounded device panel, make
sure you have a low resistance connection between the mounting rail and the
subsurface. This produces a uniform reference potential.