Siemens Simatic S7-300 User manual

Getting Started Edition 04/2000
SIMATIC
S7-300 Programmable Controller
FirstStepsforInstallationandCommissioning
TotallyIntegrated
Automation

2S7-300 Programmable Controller, Getting Started, First Steps for Installation and Commissioning
A5E00069340 01 // 04/2000
Introduction
This guide takes you through 6 commissioning steps to set up a functioning application by
running through a concrete example. In this way you will get to know the basic hardware and
software functions of your S7-300.
You should expect to spend approximately 1.5 to 2 hours on this example, depending on the
level of your experience.
Prerequisites
The following prerequisites must be fulfilled:
You must be familiar with the fundamentals of electronic/electrical engineering and have
experience of working with computers and MicrosoftWindows95/98/NT.
The reference potential must be grounded. That means that the bridge between chassis
ground and functional ground must be installed (which is how the CPU is shipped).
!Warning
The S7-300 is used as a component in installations and systems that require you to comply with
specific rules and regulations that vary depending on the application. Please note the relevant
safety and accident-prevention regulations, such as IEC 204 (emergency stop systems).
Non-compliance with these regulations can result in serious injury and damage to both machinery
and equipment.
Materials and Tools Required
Quantity Item Order Number (SIEMENS)
1 Rail e.g.: 6ES7 390-1AE80-0AA0
1PS 307 power supply (PS) with power connector (VK) e.g.: 6ES7 307-1EA00-0AA0
1CPU 314 e.g.: 6ES7 314-1AE04-0AB0
1Buffer battery 6ES7 971-1AA00-0AB0
1Digital input module (DI) with bus connector e.g.: 6ES7 321-1BH01-0AA0
1Digital output module (DO) with bus connector e.g.: 6ES7 322-1BH01-0AA0
220-pin front connector with screw-type contacts 6ES7 392-1AJ00-0AA0
1Programming device (PG) with MPI interface and installed STEP 7 ver-
sion 5.0 and PG cable Depends on configuration
X m PROFIBUS-DP cable with bus connectors Depends on type
Various M6 screws and nuts (length depends on installation location) with appro-
priate screwdriver/wrench Standard
1Screwdriver with 3.5 mm blade Standard
1Screwdriver with 4.5 mm blade Standard
1Diagonal cutter and tool for insulation stripping Standard
1Tool for pressing on wire-end ferrules Standard
X m Cable for grounding the rail with 10 mm2cross-section with cable lug for
M6, length dependent on local requirements Standard
Approx.
2 m Stranded wire with 1 mm2cross-section with appropriate wire-end ferru- les (type A, length 6 mm) Standard
X m 3-core power cable (AC 230/120 V) with shock-proof plug; length depen-
dent on local requirements; correct wire-end Standard
21-pin on switch (24 V) Standard

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S7-300 Programmable Controller, Getting Started, First Steps for Installation and Commissioning
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Layout of the example
Power supply
ON/OFF Switch for setting system voltage Mode selector switch Programming device with
STEP 7 software
Rail
Clamp for
strain relief Power connector Switches Programming device cable
E0.1
E0.2
A4.0
Overview of the layout of the example (without the wiring of the power supply to the SM)
Functionality of the Example
Output A4.0 can only be switched (i.e. the A4.0 diode lights up on the DO), if switches E0.1
and E0.2 are pressed.
Step 1: Installation
Installation sequence: from left to right: PS – CPU – DI – DO.
A bus connector (BV) is shipped with each DI and DO. You can get an idea of the overall con-
figuration in the overview figure.
Figure Installing and Grounding the Rail
1. Put the rail in position and fasten (screw size: M6) so that
there is at least 40 mm above and below the rail.
If you fasten the rail to a grounded metal plate or a grounded
device support, make sure there is a low-resistance connec-
tion between the rail and the base.
2. Connect the rail to the protective conductor. There is an M6
protective conductor screw on the rail for this purpose.
Minimum cross-section of the cable to the protective conduc-
tor: 10 mm2.

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Figure Installing the Modules on the Rail
1
2
3
1. Remove the bus connector from the ”last”
module (=DO) and insert it in the CPU. Do
not insert a bus connector on the DO during
installation.
2. Attach the PS, push it up to the grounding
screw of the rail and tighten it.
3. Attach the CPU (1), push it up to the module
on the left (2) and tip it downward (3).
0.8 to 1.1 Nm
4. Screw the module on tightly.
5. Insert the second bus connector on the DI.
6. Repeat steps 3 and 4 for the remaining mo-
dules.
Step 2: Wiring
!Warning
You can come into contact with live wires if the PS 307 is switched on or the PS network ca-
ble is connected to the power.
Only wire the S7-300 in a deenergized state!
Stage Wiring the Power Supply and the CPU
1Open the front doors of the PS and the CPU.
2Loosen the clamp for the PS strain relief (see the figure on page 3).
3Strip the power cable, attach wire-end ferrules, if necessary (for multi-wire cables), and attach to the PS.
4Tighten the clamp for the strain relief.
5Insert the power connector in the PS and CPU (see the figure on page 3) and tighten.
6Check that the line voltage selector switch is set to your line voltage.
The CPU is set in the factory to a line voltage of AC 230 V. To change the voltage, proceed as follows:
Remove the protective cap with a screwdriver, set the switch to the line voltage required and replace the
protective cap.

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S7-300 Programmable Controller, Getting Started, First Steps for Installation and Commissioning
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Stage Wiring the Front Connectors of the DI and DO
1Open the front doors of the DI and DO.
2Position the front connectors so that you can wire them:
To do this, push a front connector into both the DI and the DO until it snaps into position. The front con-
nector still sticks out of the module in this position. A wired front connector has no contact with the module
in the wiring position.
3Strip 6 mm from the wire ends you want to insert in the front connector and attach appropriate wire-end
ferrules.
4Wire the front connector of the DI as follows:
Terminal 1: L+ of the PS; terminal 13: switch 1; terminal 14: switch 2; terminal 20: M of the PS.
5Wire the front connector of the DO as follows:
Terminals 1 and 11: L+ of the PS; terminal 20: M of the PS.
6Wire the free wire ends of the switches to L+ of the PS.
7Lead the wires downward out of the front connectors.
8Press the release button of the front connector on the upper part of the module and at the same time push
the front connector into the module until the release button jumps back into its original position.
9Close the front doors of the DI, DO and PS.
Step 3: Commissioning the Hardware
Stage What to Do Result
1Connect the programming device to the CPU with the programming device cable. Make sure that the ter-
minating resistors are inserted in the connectors. Close the front door of the CPU and put the mode selec-
tor switch to
STOP .
2Connect the power cable to the network and switch on
the PS 307 power supply module. The
DC24V LED lights up on the PS.
All the LEDs on the CPU come on briefly; the SF
LED, the BATF LED and the DC5V LED remain
on. The STOP LED flashes rapidly for 3 sec. and
then remains on.
3Insert the buffer battery:
– Insert the buffer battery connector into the cor-
responding socket in the battery compartment
of the CPU. The groove on the connector must
be facing left.
– Insert the buffer battery in the battery compart-
ment of the CPU.
– Close the front door of the CPU.
The BATF LED goes off followed shortly after-
wards by the SF LED.
4Raise the programming device and start SIMATIC Ma-
nager on the Windows desktop. A SIMATIC Manager window appears.
5Carry out a memory reset in the CPU as follows:
– Turn the mode selector switch to
MRES . Keep the mode selector switch in this position until the
STOP LED comes on for the second time and stays on (this takes 3 sec.).
– Within 3 sec. you must turn the mode selector switch back to
MRES . The STOP LED starts to flash
rapidly and the CPU carries out a memory reset. When the
STOP LED comes on permanently
again, the CPU has completed the memory reset.
6Activate switch 1. The E0.1 LED on the DI comes on. No LEDs
light up on the DO.
7Activate switch 2. Die E0.2 LED on the DI comes on. No LEDs light
up on the DO.

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Step 4: Commissioning the Hardware
Stage What to Do Result
1Follow the STEP 7 new project assistant on the pro-
gramming device and create a new project with the
following data:
CPU type: CPU 314 .
Block to be created: OB1
Project name: S7_Pro1
A two-part window with the title S7_Pro1 --... ap-
pears.
2Double-click the OB1 icon in the right-hand part of the
window. The editor for the OB1 block opens.
3From the View menu, choose the LAD command to
switch to the LAD programming language. In the lower-left part of the window, a rung cur- rent path is displayed in the network.
4Click exactly on the horizontal line of the rung current
path. The line is highlighted.
5Double-click the –||– button (normally open contact) on
the toolbar and then click the –( ) button once (coil). The icons are inserted in the rung current path.
6Click the red question mark of the normally open con-
tact on the left in the rung current path. The normally open contact is highlighted, and a text box with a cursor appears at the point of the
question mark.
7 Enter E0.1 and press Return .The normally open contact on the left is assigned
the designation E0.1 .
8Label the right button in the same way with
E0.2 and the coil with A4.0 .
9Close the editor and confirm that you want to save with
Yes .The editor closes, and the OB1 is saved.

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S7-300 Programmable Controller, Getting Started, First Steps for Installation and Commissioning
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Step 5: Configuring the Hardware
Stage Procedure Result
1In SIMATIC Manager, click SIMATIC 300 Station in the
left-hand part of the window. The buttons
Hardware and CPU 314(1) appear
in the right-hand part of the window.
2Double-click the Hardware button in the right-hand part
of the window. The hardware configuration editor opens.
3If a catalog is not displayed in the right-hand part of
the window, activate the catalog by choosing the
Catalog command from the View menu.
Navigate to DI-300 via SIMATIC 300 and SM-300.
Insert the SM 321DI16xDC24V whose order num-
ber corresponds to the order number on your DI by
dragging and dropping it on slot 4 (the upper or
lower left-hand window).
Note:
You can find out the order number if you click a DI in
the catalog. The order number of this DI then appears
in the text box under the catalog.
4Navigate to DO-300 .A list containing different DOs appears.
5Insert the SM 322 DO16xDC24V/0.5A whose order
number corresponds to the order number on your DO
by dragging and dropping it on slot 5.
The module appears on slot 5.
6Check that the order number displayed for slot 2 in the
lower left-hand part of the window corresponds to the
order number on your CPU.
If necessary, widen the order number column to dis-
play the whole order number.
If yes: Continue from stage 7.
If not: Navigate in the catalog via CPU 300 to
CPU 314 and replace the CPU on slot 2 with the
CPU with the correct order number from the ca-
talog by dragging and dropping it.
7From the Station menu, choose the Save and Compile
command. The hardware configuration is compiled and sa- ved.
8Close the editor. The editor is closed.

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Step 6: Test Run
Stage Procedure Result
1Navigate via SIMATIC 300 Station and CPU 314(1) to
S7 Program. In SIMATIC Manager, click Blocks in the
right-hand part of the window.
Blocks is highlighted.
2From the PLC menu, choose the Download command
to transfer the program and the hardware configuration
to the CPU.
Click
Yes in all the dialog boxes that appear.
The program and configuration are downloaded
from the programming device to the CPU.
3Switch the CPU mode selector to RUN . The STOP LED goes out. The RUN LED starts
flashing and then comes on continuously.
4Operate the two switches alternately. The LEDs of the inputs E0.1 and E0.2 light up
alternately.
The LED of output A4.0 does not light up.
5Operate the two switches simultaneously. The LEDs of inputs E0.1 and E0.2 light up toge-
ther.
The LED of output A4.0 comes on. This would
switch on a connected actuator or indicator.
Diagnosis/Debugging
Incorrect operation, incorrect wiring or incorrect hardware configuration can result in faults
that the CPU indicates after a memory reset with the group error LED SF .
You can find out how to evaluate these errors and messages in the manuals: Hardware and
Installation ; Section 8.3.2 and Programming with STEP 7 V5.0 ; Chapter 21.
Manuals for Further Information
We recommend that you also read Getting Started First Steps with STEP 7 V5.0 .
You can download all the manuals free of charge from the Siemens home page (Products &
Solutions – Industrial Services – Support – SIMATIC – Customer Support).
Siemens AG
Bereich Automatisierungs- und Antriebstechnik
Geschäftsgebiet Industrie-Automatisierungssysteme
Postfach 4848, D-90327 Nürnberg
Siemens Aktiengesellschaft
Siemens AG 2000
Subject to change without prior notice
A5E00069340
Printed in the Federal Republic of Germany