Siemens Simatic PG 740 User manual

Preface, Contents
Product Overview 1
Installing the PG 740 2
Starting Up the PG 740 3
PG 740 Expansions 4
Configuring the PG 740 5
Error Diagnostics 6
Hardware Information 7
Glossary, Index
C79000-G7076-C742-01
Programming Device PG 740
Manual
SIMATIC

ii
Programming Device PG 740
C79000 G7076 C742 01
This manual contains notices which you should observe to ensure your own personal safety, as well asto
protect the product and connected equipment. These notices are highlighted in the manual by a warning
triangle and are marked as follows according to the level of danger:
!Danger
means that death, severe personal injury or substantial property damage will result if proper precautions are
not taken.
!Warning
indicatesthatdeath,severepersonalinjuryorsubstantialpropertydamagecanresultifproperprecautionsare
not taken.
!Caution
indicates that minor personal injury or property damage can result if proper precautions are not taken.
Note
drawsyourattentiontoparticularlyimportantinformationontheproduct,handlingtheproduct,ortoaparticular
part of the documentation.
The device/system may only be set up and operated in conjunction with this manual.
Only qualified personnel should be allowed to install and work on this equipment. Qualified persons in the
sense of the safety guidelines of this Manual are defined as persons who are authorized to commission, to
ground and to tag equipment, systems and circuits in accordance with established safety practices and stan-
dards.
Note the following:
!Warning
Thisdeviceanditscomponentsmayonlybeusedfortheapplicationsdescribedinthecatalogorthetechnical
description, and onlyin connection with devicesor components fromother manufacturers whichhave been
approved or recommended by Siemens.
Thisproductcanonlyfunctioncorrectlyandsafelyifitistransported,stored,setup,andinstalledcorrectly,and
operated and maintained as recommended.
SIMATICRand SINECRare registered trademarks of SIEMENS AG.
Third parties using for their own purposes any other names in this document which refer to
trademarks might infringe upon the rights of the trademark owners.
We have checked the contents of this manual for agreement with the
hardwareandsoftwaredescribed.Sincedeviationscannotbeprecluded
entirely, we cannot guarantee full agreement. However, the data in this
manualarereviewedregularlyandanynecessarycorrectionsincludedin
subsequent editions. Suggestions for improvement are welcomed.
ESiemens AG 1996
Technical data subject to change.
Disclaimer of LiabilityCopyright ESiemens AG 1996 All rights reserved
Thereproduction,transmissionoruseofthisdocumentoritscontentsis
notpermittedwithoutexpresswrittenauthority.Offenderswillbeliablefor
damages.Allrights,includingrightscreatedbypatentgrantorregistration
of a utility model or design, are reserved.
Siemens AG
AutomationGroup
IndustrialAutomation Systems
Postfach4848, D-90327Nürnberg
Siemens Aktiengesellschaft Order No. 6ES7740-2AA00-8BA0
Safety Guidelines
Qualified Personnel
Correct Usage
Trademarks

iii
Programming Device PG 740
C79000-G7076-C742-01
Preface
This manual contains all the information you need for working with the
PG 740 programming device. You can use it to
Sunpack the programming device and power it up.
Sfamiliarize yourself with the functions and settings of the various
components (display, keyboard, programming facilities etc.).
Sconnect the programming device up to other units of equipment
(programmable controllers, other programming devices).
Sexpand your system, provided you comply with the necessary conditions.
Sanalyze and eliminate simple faults.
The following persons require the manual:
SUsers commissioning the programming device themselves or working
with it (editing, programming or debugging).
SSystem administrators operating the programming device in a network.
SService and maintenance personnel using the PG 740 for system
expansion purposes or error/fault analysis.
This manual does not contain information on the operating system or
programming software. You will find this information in the relevant
software manuals.
The Product Information Bulletin supplied with the PG 740 contains the
latest technical specifications of the programming device, and the addresses
and telephone numbers of the repair and maintenance centers and the hotline.
When your PG 740 is delivered, you also receive a Product Information
leaflet with information on the latest software release.
What this Manual
is About
Who is the Manual
Intended For?
Other Manuals
Product
Information
Bulletin
Product
Information

iv Programming Device PG 740
C79000-G7076-C742-01
If you have any questions concerning subjects not covered in the manual, just
get in touch with the Siemens representative in your area.
If you have any questions on the manual itself or would like to make remarks
or suggestions, please complete the reply card at the end of the manual. We
would also appreciate it if you would include your own personal opinion on,
and appraisal of, the manual on the reply card.
The manual contains both the most important instructions for starting up and
using the programming device, as well as reference sections you will only
require in special cases.
Before you use the PG 740 for the first time, read Chapter 2 on the PG 740’s
components and functionality.
Chapter 3 describes the basic steps necessary for starting up the PG 740. This
section also contains instructions for working with memory cards for
programmable controllers and for connecting the programming device to
other devices.
Chapter 4 describes how to expand your PG 740 (installation of memory
expansion or additional modules). Please observe the safety notes.
Modifications to the system hardware may make it necessary for you to adapt
the original hardware configuration. Chapter 5 tells how to proceed in this
case.
Chapter 6 will tell you how to deal with simple faults that you can diagnose
and, in some cases, eliminate yourself.
Chapter 7 contains hardware addresses, interrupt assignments and
information on connecting cables.
The glossary explains important terms.
The index will enable you to quickly find passages in the text pertaining to
important keywords.
Queries
Pointers through
the Manual
Installation
Startup
Expansion
Configuration
Error/Fault
Diagnostics
Reference Data
Glossary
Alphabetical Index
Preface

v
Programming Device PG 740
C79000-G7076-C742-01
Contents
1 Product Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Installing the PG 740 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Setting up the PG 740 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Hardware Components of the PG 740 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Display 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Keyboard 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Trackball 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Drives 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Transport 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Starting Up the PG 740 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Connecting the PG 740 to the Power Supply 3-2. . . . . . . . . . . . . . . . . . . . . . . .
3.2 Connecting I/O Devices 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Working with SIMATIC S5 Memory Submodules 3-9. . . . . . . . . . . . . . . . . . . . .
3.4 Working with SIMATIC Memory Cards 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Working with PCMCIA Cards 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 PG 740 Connections (Point-To-Point Connections) 3-12. . . . . . . . . . . . . . . . . . .
3.7 Multipoint Interface (MPI/DP) 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 SINEC L2 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 SINEC H1 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 PG 740 Expansions 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Opening the Unit 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Functional Units Visible after Opening the Unit 4-4. . . . . . . . . . . . . . . . . . . . . . .
4.3 Installing Expansion Modules 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Installing Memory Expansion Cards 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Installing a Cache 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Back-Up Battery 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Processor Upgrade 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 Closing the Unit 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Configuring the PG 740 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Changing the System Configuration with SETUP 5-2. . . . . . . . . . . . . . . . . . . . .

vi Programming Device PG 740
C79000-G7076-C742-01
5.1.1 The Main Menu 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 The Advanced Menu 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.3 The Security Menu 5-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.4 The Power Menu 5-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.5 The Exit Menu 5-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 PCI Configuration 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Configuring the PCMCIA Interface 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Error Diagnostics 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Hardware Information 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Hardware Address Table 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Interrupt Assignments 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 PG 740 Video Modes 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4 Connector Pinouts 7-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.5 Connecting Cables 7-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary Glossary-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents

1-1
Programming Device PG 740
C79000-G7076-C742-01
Product Overview
The PG 740 programming device is a high-performance device, equipped
with the optimum hardware features and software for programming,
debugging, and starting up programmable controllers in an automation
environment.
You can use the PG 740 programming device to program SIMATIC S5 and
SIMATIC S7 programmable controllers. It has
Sinterface ports for connection to the programmable controllers
Sprogramming facilities for S5 and S7 memory cards.
The PG 740 is shipped with the software listed in the Product Information
leaflet.
Application
Hardware/Software
Complement
1

1
1-2 Programming Device PG 740
C79000-G7076-C742-01
Compared to a PC with standard hardware and software, the PG 740
programming device of the SIMATIC family has numerous advantages:
You can develop, debug and document user programs for SIMATIC S5
and SIMATIC S7 programmable logic controllers with the PG 740
without the need for additional hardware or software.
The rugged design and functionality of the PG 740 make it particularly
suitable for use on site under hostile industrial conditions. The PG 740
meets the specific requirements of industrial environments, such as
noise immunity, compliance with the relevant standards, ruggedness,
simple transportation and startup.
The PG 740 can be set up and operated in a large number of different
ways and positions, and can therefore be used practically everywhere it
is needed.
The PG 740 has all the integral ports necessary for connecting it to
SIMATIC automation devices:
– Programming interface for SIMATIC S5 EPROMs and EEPROMs
– Programming interface for SIMATIC S5 and SIMATIC S7 memory
cards in credit-card format
– Interfaces for connection to S5 and S7 programmable controllers.
The PG 740 is supplied with all the necessary system and automation
software already installed on the hard disk.
Since MS-DOS and Windows are also already installed, you can, of
course, also use the PG 740 as a stand-alone workstation, and run all
the standard software available on the market that requires MS-DOS or
Windows.
The PG 740 has the power and expansion capability of normal PCs,
and can therefore also be used as a fully-fledged personal computer.
Advantages of
the PG 740
Product Overview

2-1
Programming Device PG 740
C79000-G7076-C742-01
Installing the PG 740
This chapter describes how you install your PG 740. It provides you with
comprehensive information on the major components of the PG 740, such as:
Sdrives
Skeyboard, and
Sprogramming facilities.
In Section You Will Find On Page
2.1 Setting up the PG 740 2-2
2.2 Hardware Components of the PG 740 2-6
2.3 Display 2-9
2.4 Keyboard 2-10
2.5 Trackball 2-16
2.6 Drives 2-18
2.7 Transport 2-20
When you have worked through this chapter, you will be familiar with
Sthe procedures to follow when unpacking your PG 740
Sthe major components of the PG 740 and their functions, and
Sthe right way to transport the unit.
What Does this
Chapter Contain?
Summary of
Sections
What Will You
Know at the End of
this Chapter?
2

2
2-2 Programming Device PG 740
C79000-G7076-C742-01
2.1 Setting up the PG 740
Unpack your PG 740 as follows:
1. Remove the packing.
2. Do not throw the original packing away. Keep it in case you have to
transport the unit again sometime in the future.
3. Check with the packing list to make sure no components are missing.
!Caution
Risk of damage!
When transporting the unit in cold weather, when it may be submitted to
extreme variations in temperature, make sure that no condensation is
allowed to form on or in the unit.
The unit should be allowed to reach room temperature slowly before it is
started up. If condensation has formed, the unit should be left for
approximately 12 hours (with a temperature difference of -20°C to + 20°C
(-4°F to + 68°F)) before being switched on.
The PG 740 is usually mounted on a desk or table top. To make working with
the PG 740 easier, it can be adapted as follows to the particular workplace:
1. Set the PG 740 down on the desk or table top.
2. Open the keyboard lock by pulling up the anthracite-colored handle.
3. Swing the keyboard down into position.
Handle
Figure 2-1 Handle for Unlocking Keyboard
Unpacking the
PG 740
Desk-Top
Mounting
Installing the PG 740

2
2-3
Programming Device PG 740
C79000-G7076-C742-01
With the keyboard open, you can incline the unit to any angle between 0 and
90°around the axis of rotation of its stand. Proceed as follows:
1. Swing the keyboard down.
2. Pull the extra support (Figure 2-3) out of the rear of the stand.
3. Incline the unit to the angle you prefer.
Figure 2-2 Changing the Angle of Inclination
!Caution
Risk of injury!
There is a danger of the unit tipping over if it is set up without extra support
and at an angle of inclination of more than 15°. This could lead to personal
injury and also damage to the unit.
If the angle of inclination is greater than 15°, you must use the extra
slide-out support in the stand.
Changing the
Angle of
Inclination
Installing the PG 740

2
2-4 Programming Device PG 740
C79000-G7076-C742-01
If you do not have a desk or table on which to mount the unit, you can work
with it standing on the floor. You can swing the casing with display through
about 90°into the horizontal plane.
Stand
Pivot
Extra pull-out support
Figure 2-3 Horizontal Operating Position without Keyboard
You can remove the keyboard if you are operating the unit in the position
shown in Fig. 2-3.
Press down on the locks in
the middle of the hinge
assembly
Figure 2-4 Detaching the Keyboard
!Caution
If the keyboard is detached, there is a risk of the unit falling over. Pull out
the extra support.
Horizontal
Mounting
Detaching the
Keyboard
Installing the PG 740

2
2-5
Programming Device PG 740
C79000-G7076-C742-01
You detach the keyboard as follows:
1. Grip the keyboard hinges in the stand behind the keyboard as shown in
Figure 2-4.
2. Pull the locks in the middle of the hinge assembly toward the keyboard.
3. Pull the keyboard up and out.
4. Set the keyboard down on a suitable surface, using the hinge assembly as
a stand.
5. Make sure the cable is not pinched or squashed in any way.
6. To attach the keyboard again, snap the keyboard hinges into the matching
receptacles in the stand.
The basic unit can be attached to a wall. Four drilled holes (6 mm diameter)
are provided in the base of the unit for this purpose.
345 mm
ø6
83 mm
Figure 2-5 Drilling Template for Wall Mounting
Wall Mounting
Installing the PG 740

2
2-6 Programming Device PG 740
C79000-G7076-C742-01
2.2 Hardware Components of the PG 740
You can access all important operator controls and displays from the front or
sides of the unit.
and can be detached and snapped back on.
2
3
4
6
7
8
13
1
5
1On/Off switch
2Carrying handle
3LC display
4Ventilating slots
5Cover for submodule, memory card, PCMCIA
interfaces and floppy disk drive 1)
6Stand
7Keyboard
8Cover for VGA, COM1, COM2, MPI,
LPT1/printer and mouse interfaces 1)
9Trackball
10 Catches for locking keyboard
11 Pivot
12 Protector strip
9
11
12
10 10
1) The coverplates are used to protect the interface ports from dust,
Power
Hard disk access
Floppy access
Submodule programming active
MPI/DP interface
13 LED displays
Figure 2-6 The Front of the PG 740
Front
Installing the PG 740

2
2-7
Programming Device PG 740
C79000-G7076-C742-01
All the connectors and interface ports for connecting to external devices are
located on the left-hand side panel of the PG 740 (communications side).
Power switch
LEDs
VGA port
COM2/V.24 interface
COM1/V.24 interface
MPI/DP
LPT
PS/2 mouse
Power supply
connector socket
Dummy plates
covering
expansion slots
Figure 2-7 Left-Hand Casing Side Panel with Coverplates Removed
The following table contains an overview of the various interface ports and
connectors:
Ports and Connectors Function
VGA port Connection for external monitor
Serial port
COM2
V24/
Connection for serial mouse
V.24/mouse
Serial port Connection for serial printer
COM1
V.24/MODEM/PLC
Serial port Connection for S5 programmable
controller
MPI /DP
(Multipoint interface/
distributed I/Os)
Connection for S7 programmable
controller and for distributed I/Os
LPT1 Printer
Pllli f
Connection for parallel printer
Parallel interface
pp
PS/2 mouse Connection for PS/2 mouse
Connector for power supply Connection for power supply
Left Hand Casing
Side Panel
(Communications
Side)
Connectors and
Ports
Installing the PG 740

2
2-8 Programming Device PG 740
C79000-G7076-C742-01
You access the slots for S5/S7 memory submodule programming, the
PCMCIA port and the disk drive from the right-hand side panel of the
PG 740’s casing (processing side).
Ventilating slots
Memory card port
S5 EPROM/EEPROM port
Ejector for disk
3.5 in. disk drive
PCMCIA port
Ejector for PCMCIA
cards
Access LED
Figure 2-8 Right-Hand Casing Side Panel
The following table contains an overview of the various interface ports and
connectors:
Interface Port Function
S5 module interface Programming of SIMATIC S5 memory
submodules
Memory card interface Programming of SIMATIC memory cards
PCMCIA port Connection for PCMCIA cards
Disk drive Processing of 3.5 in. disks
The raised air outlet slots for ventilation are located above the interface ports.
There are also ventilating slots on the underside of the base. These slots must
not be covered or blocked in any way (by carpeting, for instance).
!Caution
Risk of overheating!
If you cover up the slots for the inlet and outlet air in any way, there is a risk
that your PG 740 will be damaged.
Do not place any objects over, or lay them on, the ventilating slots.
Right-Hand Casing
Side Panel
(Processing Side)
Ventilating Slots
Installing the PG 740

2
2-9
Programming Device PG 740
C79000-G7076-C742-01
2.3 Display
The PG 740 has a TFT (thin-film transistor) color display with a 10.4 in.
diagonal and a resolution of 800 x 600 pixels.
Figure 2-9 The PG 740’s Color Display
The three primary colors, red, green and blue, can each be displayed in six
different shades. This means that, including all secondary colors formed, a
maximum of 65535 from 262144 different colors can be displayed, where the
number of colors can be set in the respective graphic driver The display has
automatic contrast control.
!Caution
Risk of injury!
If a display is damaged, liquid crystal may escape. Do not touch this liquid
or allow it to come into contact with your skin in any way, and do not
breathe in the vapors. If you do come into contact with the liquid, wash
those parts of the skin affected immediately with alcohol, and rinse with
plenty of water. Then consult a physician right away.
Use only a cotton cloth and a neutral cleansing agent to clean the display. Do
not use water or aggressive solvents (like alcohol or acetone, for instance).
Never touch the display with hard, pointed objects.
The PG 740’s Color
Display
Color Shades
Installing the PG 740

2
2-10 Programming Device PG 740
C79000-G7076-C742-01
2.4 Keyboard
The keyboard is divided into the following three areas:
SAlphanumeric or typewriter keyboard
SNumeric keypad with cursor control keys
SFunction keys
Esc F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 Print Pause
Break
SysRq
F11 F12
kkk
QWE RTYU IO P Ü
{
Home
Page
Page
End
ASDFGHJK L ÖÄ
Caps
Lock
1234567{890-ß
=
!
@ ” # w$ % ^ & & / * ( ( ) ) = __?
Ctrl Alt AltGr
Z YXC BNM < ;,> :
.?
>
<V
789
456
123
F
nInsert Delete
Num
Page
End Page
Ins Del
Enter
0
Home +
Num Scroll
.
.
@[*
}
]+
:
;’
”\|#
}
[
~
~
.,
+
3
1
2
5
4
1Function keys
2
3
4
Typewriter or alphanumeric keyboard
Cursor control keys
Numeric keypad
5Numeric block active
67
6
Uppercase active
7Scroll lock active
Figure 2-10 Keyboard
All keys on the keyboard are of the autorepeat type. That is, the relevant
character is repeated as long as you keep the key depressed.
When the keyboard is attached to the casing, it has an inclination of 6°, and
the middle row of keys is at a height of 30 mm. When the keyboard is
detached from the casing, its angle of inclination is 4.5°and the middle row
of keys is at a height of 27 mm. Ergonomically, these are the ideal positions
for the keyboard.
Keyboard Layout
Setting Up the
Keyboard
Installing the PG 740

2
2-11
Programming Device PG 740
C79000-G7076-C742-01
The largest block of keys on the keyboard is the alphanumeric or typewriter
keyboard with all the keys for the letters of the alphabet, numerals and
special characters. The characters (letters, numerals and special characters)
are arranged in generally the same way as on a normal typewriter. However,
there are a number of special keys which have specific special functions for
the PG 740.
The keyboard has international labeling.
International
Shift
Unshift
National Example: German
Font size and thickness
reduced
?
ß\Together with the
ALTGR key
Figure 2-11 The Keyboard Labeling System
The special keys in the alphanumeric keyboard have the following functions:
Key Function
Backspace Key
This key moves the cursor one space to the left and deletes the
character at this position
Return Key
The Return or Enter key is used mainly to terminate a command
line in the operating system; that is, the command you have
typed in is executed when you press this key. For other uses of
this key, please refer to the user manual of the relevant
application program.
Caps
Lock
CAPS-LOCK Key
If you press this key, the middle LED at the top right-hand corner
of your keyboard lights up. All letters then appear in uppercase
and the upper of the two characters on the individual keys
applies. If you wish to type in lowercase letters in this position,
you must first strike the Shift key.
If you are using an international keyboard, you cancel this
function by pressing the CAPS-LOCK key again. The LED goes
out. If you have a German keyboard, you must strike the Shift
key to cancel this function.
Typewriter or
Alphanumeric
Keyboard
Keyboard Labeling
Special Keys
Installing the PG 740

2
2-12 Programming Device PG 740
C79000-G7076-C742-01
Key Function
NUM NUM Key
You switch from the numeric block to cursor control with this key
(Num LED lights up). Press the key again to return to cursor
control.
Tabulator Key
This key moves the cursor by one or more positions to the right.
Fn
“Fn” Special key (combination key)
Together with a second key (key combination), you activate other
key codes for specific applications with this key (see Fig. 2-13
Function Keys).
Ctrl CTRL Key (combination key)
This key is only used in combination with other keys. For
example, you press Ctrl + ALT + DEL to reset and restart the
operating system. For other uses of this key, please refer to the
user manual of the relevant application program.
Alt ALT Key (combination key)
This key is only used in combination with other keys. For
instance, you can enter the hexadecimal value of an ASCII
character (and consequently additional special characters) using
this key and the numeric keypad.
ALT + 123 corresponds to ”{”.
AltGr
ALTGr Key (combination key)
You can use this key together with the other combination keys to
generate other key codes. For example, you can generate the ”\”
character on the German keyboard by striking ALTGr + ß.
Print
SysRq
PRINT Key (combination key)
You can output the current screen display to a printer by pressing
the PRINT key.
Pause
Break
PAUSE Key (combination key)
The PAUSE key interrupts program execution in the majority of
applications.
There are three LEDs on the keyboard. They are located to the right of the
function keys in the top row of the keyboard directly above the numeric
keypad.
SNUM LOCK
SCAPS LOCK
SSCROLL LOCK
When the programming device is powered up, the NUM LOCK, CAPS LOCK
and SCROLL LOCK LEDs light up briefly twice. The keyboard is then ready
for operation.
Location and
Labeling of the
LED
Installing the PG 740