Siemens SIMATIC NET CP 343-2 User manual

Preface, Contents
Technical Description 1
Installation and Commissioning 2
Configuration with STEP 7 3
Data Exchange between the
User Program and AS-i Slaves 4
Using the Command Interface 5
Diagnostics and Interrupts of the
CP 343−2 6
Dealing with Problems /
Error Displays 7
Appendix
AS-Interface Protocol Implemen-
tation Conformance Statement A
References and Literature B
Notes on the CE Mark C
Glossary D
Index
R
elease 08/2008
C
79000−G8976−C149−04
C
P 343−2 / CP 343−2 P
A
S−Interface Master
M
anual
S
IMATIC NET
The following supplements (Edition 08/2010)
belong to this documentation
1 Technical description
1.10 AS-Interface operation with 24 V voltage (AS-i Power24V)
5 Using the command interface
5.1 Description of FC "ASI_3422" (supplements
5.2 Description of the AS-i-slave commands (supplements)
7 Dealing with problems / error displays
7.1 Replacing a defective AS-i slave/automatic address
programming
7.2 Error displays/remedying errors (incompatibilities)

2CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Classification of Safety-Related Notices
This manual contains notices which you should observe to ensure your own perso-
nal safety, as well as to protect the product and connected equipment. These noti-
ces are highlighted in the manual by a warning triangle and are marked as follows
according to the level of danger:
!Danger
indicates that death or severe personal injury will result if proper precautions are
not taken.
!Warning
indicates that death or severe personal injury can result if proper precautions are
not taken.
!Caution
with warning triangle indicates that minor personal injury can result if proper
precautions are not taken.
Caution
without warning triangle indicates that damage to property can result if proper
precautions are not taken.
Notice
indicates that an undesirable result or status can result if the relevant notice is
ignored.
Note
highlights important information on the product, using the product, or part of the
documentation that is of particular importance and that will be of benefit to the
user.

3
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Trademarks
SIMATICR, SIMATIC HMIR and SIMATIC NETR are 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.
Safety Instructions Regarding your Product:
Before you use the product described here, read the safety instructions below tho-
roughly.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment.
Qualified persons are defined as persons who are authorized to commission, to
ground, and to tag circuits, equipment, and systems in accordance with establis-
hed safety practices and standards.
Correct Usage of Hardware Products
Note the following:
!Warning
This device and its components 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.
This product can only function correctly and safely if it is transported, stored, set
up, and installed correctly, and operated and maintained as recommended.
Before you use the supplied sample programs or programs you have written
yourself, make certain that no injury to persons nor damage to equipment can
result in your plant or process.
EU Directive: Do not start up until you have established that the machine on which
you intend to run this component complies with the directive 98/37/EG.
Correct Usage of Software Products
Note the following:
!Warning
This software may only be used for the applications described in the catalog or the
technical description, and only in connection with software products, devices, or
components from other manufacturers which have been approved or
recommended by Siemens.
Before you use the supplied sample programs or programs you have written
yourself, make certain that no injury to persons nor damage to equipment can
result in your plant or process.

4CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Prior to Startup
Prior to startup, note the following:
Caution
Prior to startup, note the information and follow the instructions in the latest docu-
mentation. You will find the ordering data for this documentation in the relevant
catalogs or contact your local Siemens office.
We have checked the contents of this manual for agreement with the hard-
ware and software described. Since deviations cannot be precluded entirely,
we cannot guarantee full agreement. However, the data in this manual are
reviewed regularly and any necessary corrections included in subsequent
editions. Suggestions for improvement are welcomed.
Disclaimer of LiabilityCopyright E Siemens AG 2001−2008 All rights reserved
The reproduction, transmission or use of this document or its contents is not
permitted without express written authority . Offenders will be liable for
damages. All rights, including rights created by patent grant or registration of
a utility model or design, are reserved.
Siemens AG
Industry Automation
Industrial Communication
Postfach 4848, D-90327 Nuernberg Technical data subject to change.
Siemens Aktiengesellschaft G79000−G8976−C149−03

5
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Preface
Purpose of the Manual
This manual supports you when using the following modules:
SCP 343-2
SCP 343-2 P
It contains information about how the PLC can address AS-i actuators and AS-i
sensors via this module.
What’s new?
The CP 343-2 (6GK7 343-2AH01-0XA0) and the CP 343-2 P
(6GK7 343-2AH11-0XA0) as of firmware version V3.0 support all combined
transaction type slaves (CTT slaves) according to AS-i Specification V3.
For these CPs as of firmware version V3.0, configuration of the CTT slaves is
supported as of STEP 7 version 5.4 SP4. The command interface has been
expanded to allow the transfer of CTT2 strings.
The following AS-i CPs do not support CTT slaves complying with AS-i
specification V3:
S6GK7 343-2AH00-0XA0
S6GK7 343-2AH10-0XA0
As of STEP 7 version 5.3 SP3, the selection of Siemens slaves is supported in the
slave project engineering.
This issue of the manual also includes several corrections.
The notes on installation have been integrated in the manual. The product
information bulletin no longer ships with the product.

Preface
6CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
We recommend the following procedure when...
... You want an overall picture of the AS-Interface.
− First read ‘AS-Interface − Introduction and Basic Information’ (on the
accompanying product CD). This contains general information about the
AS-Interface, abbreviated to AS-i in the following chapters.
... You want to set up an AS-i system and include the CP 343-2 module in it:
− You will find the relevant information about connecting and operating the
CP 343-2 in Chapter 1, 2 and 3.
... You want to know how to operate the CP 343-2 from the PLC:
− Read Chapter 4.
− Chapter 5 explains the command interface.
Requirements
To understand this manual, you require the following:
SBasic knowledge of SIMATIC S7, STEP 7
SFamiliarity with the manual ‘AS-Interface − Introduction and Basic Information’
(on the accompanying product CD).
CD with sample program
The accompanying CD contains a sample program for operating the CP 343-2.
FAQs
You will find FAQs on Siemens AS-i products on the Internet on the Service and
Support pages of Industry Automation at the following address:
http://support.automation.siemens.com/WW/view/en/10805888
-

7
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
Contents
Preface 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Technical Description 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 General Notes on Operation − Safety Warnings 11. . . . . . . . . . . . . . . . . .
1.2 Overview of the Module 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Uses of the Module 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 The Product 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Technical Specifications of the Module 15. . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Approvals 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Displays and Operator Controls of the CP 343-2 17. . . . . . . . . . . . . . . . . .
1.6 Configuring using Buttons 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Modes 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 Permitted Slots for the CP 343-2 in the SIMATIC S7-300 and in
the ET 200M 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 Addressing the CP 343-2 in the S7 Automation System 24. . . . . . . . . . .
2 Installation and Commissioning 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Safety Warnings 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Installing and Commissioning the CP 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Configuration with STEP 7 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 General Information on Configuring the CP 343-2 with STEP 7 28. . . . .
3.2 STEP 7 Basic Configuration 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Extra Configuration of the CP 3 43-2 P 30. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Configuring in STEP 7 − Operating Parameters 30. . . . . . . . . . . . . . . . . .
3.3.2 Configuring AS-i Slaves 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Uploading the Actual Configuration to the PG (CP 3 43-2 P only) 38. . .
4 Data Exchange between User Program and AS−i Slaves 39. . . . . . . . . . . . . . . . . .
4.1 Exchanging AS−i Binary Values with Standard or A Slaves 39. . . . . . . . .
4.1.1 Addressing the Standard or A Slaves with the PLC 40. . . . . . . . . . . . . . .
4.1.2 Accessing Binary Data of Standard or A Slaves 42. . . . . . . . . . . . . . . . . .
4.2 Exchanging AS-i Binary Values with B Slaves 44. . . . . . . . . . . . . . . . . . . .
4.2.1 How the PLC Addresses the Slaves 45. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 Accessing Binary Data of B Slaves 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Points to Note about Binary Data of Analog Slaves 47. . . . . . . . . . . . . . .

Contents
8CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
4.3.1 Point to Note About Analog Slaves 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Points to Note About AS-i Safety Slaves 47. . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Transferring AS-i Analog Values 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Addressing Analog Values of AS-i Slaves 48. . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Programming Examples 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Using the Command Interface 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Description of FC “ASI_3422” 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Description of the AS-i Slave Commands 59. . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Set_Permanent_Parameter 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Get_Permanent_Parameter 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Write_Parameter 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4 Read_Parameter 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.5 Store_Actual_Parameters 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.6 Set_Extended_Permanent_Configuration 67. . . . . . . . . . . . . . . . . . . . . . . .
5.2.7 Get_Extended_Permanent_Configuration 68. . . . . . . . . . . . . . . . . . . . . . . .
5.2.8 Store_Actual_Configuration 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.9 Read_Extended_Actual_Configuration 70. . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.10 Set_LPS 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.11 Set_Offline_Mode 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.12 Select Autoprogramming 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.13 Set_Operation_Mode 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.14 Change_AS-I_Slave_Address 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.15 Get_AS-i_Slave_Status 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.16 Get_LPS, Get_LAS, Get_LDS, Get_Flags 77. . . . . . . . . . . . . . . . . . . . . . .
5.2.17 Get_Extended_Total_Configuration 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.18 Store_Extended_Total_Configuration 85. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.19 Write_Extended_Parameter_List 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.20 Read_Extended_Parameter_Echo_List 91. . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.21 Read_Write_CTT2_request 92. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.22 Read_Version_ID 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.23 Read_AS-i_Slave_ID 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.24 Read_AS-i_Slave_Extended_ID1 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.25 Write_AS-i_Slave_Extended_ID1 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.26 Read_AS-i_Slave_Extended_ID2 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.27 Read_AS-i_Slave_I/O 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.28 Get_LPF 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.29 Write_AS-i_Slave_Parameter_String 100. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.30 Read_AS-i_Slave_Parameter_String 101. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.31 Read_AS-i_Slave_ID_String 102. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.32 Read_AS-i_Slave_Diagnostic_String 103. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
9
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
6 Diagnostics and Interrrupts of the CP 343-2 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Overview 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Interrupt Events 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Sequence of Diagnostic Interrupt Processing 105. . . . . . . . . . . . . . . . . . . . .
6.4 Response to Interrupts in Different CP Operating States 106. . . . . . . . . . .
6.5 Local Data of the Diagnostic Organization Block (OB82) 106. . . . . . . . . . .
6.6 Reading the Diagnostic Data Record DS 1 108. . . . . . . . . . . . . . . . . . . . . . .
6.7 Programming Example 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8 Diagnostic Interrupts: Some Examples 110. . . . . . . . . . . . . . . . . . . . . . . . . .
7 Dealing with Problems / Error Displays 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Replacing a Defective AS-i Slave/Automatic Address Programming 111.
7.2 Error Displays/Remedying Errors 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A AS−Interface Protocol Implementation
Conformance Statement (PICS) 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B References and Literature 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Notes on the CE Mark 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Glossary 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
1 Technical Description
This chapter describes the features of the module and familiarizes you with the
basic functions of the AS-i master module CP 343-2.
You will learn the following:
SThe PLC systems on which the AS-Interface can be operated with the
CP 343-2 / CP 343-2 P.
SWhich displays and operator controls are available on the CP 343-2 /
CP 343-2 P.
SWhich modes are supported by the CP 343-2 / CP 343-2 P.
SWhich options are available with the button configuration
SHow addressing is handled on the CPU
Notice
The two device types CP 343-2 and CP 343-2 P are largely identical in terms of
functionality. The CP 343-2 P however has additional options for configuration and
parameter assignment during startup (see Section 2.1).
The CP 343-2 P module is not therefore intended as a replacement for the
CP 343-2 that can still be ordered!
Note
In the description below a distinction between the types CP 343-2 and CP 343-2 P
is made only where their performance characteristics differ.
Otherwise, unless specifically indicated, the name CP 343-2 (or CP) stands for
both device types CP 343-2 and CP 343-2 P

1 Technical Description
11
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1.1 General Notes on Operation − Safety Warnings
Using the CP
You can use the CP 343-2 in the following automation systems:
SS7-300 − central configuration
SS7-300 − distributed configuration via ET 200M (IM153)
You can also connect the CP to an S7-400H via a redundant ET 200M.
Caution
To ensure protection from electrostatic discharge, the module may only be
operated when the front panel is closed.
When operating the module, implement the measures for preventing build up of
electrostatic charges. For information on this topic, refer to the S7-300 device
manual /4/.
You will find further information on conditions for use in Chapter 2.
!Warning
WARNING − EXPLOSION HAZARD: DO NOT DISCONNECT EQUIPMENT
WHEN A FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS PRESENT.
!Warning
When used under hazardous conditions:
SIf the cable or conduit entry point exceeds 70_C or the branching point of
conductors exceeds 80_C, special precautions must be taken: If the equipment
is operated in an air ambient of 50_C ... 60_C, only use cables with admitted
maximum operating temperature of at least 80_C.
SProvisions shall be made to prevent the rated voltage from being exceeded by
transient disturbances of more than 40%. This criterion is fulfilled, if supplies
are derived from SELV (Safety Extra Low Voltage) only.
Restrictions
Access to AS-i analog values using data records 140 to 147 and to the binary
values of the B slaves using data record 150 is not possible with the CPU 318 with
a firmware version V1.1.3 or earlier.

1 Technical Description
12 CP 343−2 / CP 343−2 P AS−Interface Master
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1.2 Overview of the Module
1.2.1 Uses of the Module
The CP 343-2 module can be operated in the automation systems (AS or PLC) of
the S7-300 series and in the ET 200M system. It allows the connection of an AS-i
chain to the programmable controllers listed above.
Using the CP 343-2, you can access the inputs and outputs on the AS-i slaves
from the PLC. Depending on the slave type, you can access binary values or
analog values.
All AS-i slaves complying with AS-i specification V3.0 can be operated except for
slaves complying with slave profile 7.1 and 7.2.
Binary actuators/
sensors without
Branch of the AS-i
cable
AS-i power supply unit
Active module
(with slave ASIC)
Passive module
(without slave ASIC)
AS-i cable
Binary sensors/actuators
with slave ASIC
CP 343-2
S7−300
slave ASIC
Actuator/sensor
with direct connection
Figure 1-1 Using the CP 343-2 Master Module in the S7-300

1 Technical Description
13
CP 343−2 / CP 343−2 P AS−Interface Master
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Binary actuators/
sensors without
Branch of the AS-i
cable
AS-i power supply unit
Active module
(with slave ASIC)
Passive module
(without slave ASIC)
AS-i cable
Binary sensors/actuators
with slave ASIC
CP 343-2
slave ASIC
Actuator/sensor
with direct connection
ET 200M
(IM 153) *)
PROFIBUS
Figure 1-2 Distributed Use of the Master Module CP 343-2 in the ET 200M
*)The CP 343-2 / CP 343-2 P is not released for operation in the IM 153-3.

1 Technical Description
14 CP 343−2 / CP 343−2 P AS−Interface Master
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1.2.2 The Product
The product consists of the following:
1. One of the modules of the following type:
− CP 343-2 Order number 6GK7 343-2AH01-0XA0
− CP 343-2 P Order number 6GK7 343-2AH11-0XA0
2. Backplane bus connector
3. Labeling strips
4. CD with sample programs and documentation
The STEP 7 block FC “ASI_3422” (version 2.0) required for extended operation
of the CP 343-2 is included on this CD.
Note
The 20-pin front connector for attaching to the AS-i cable is not supplied with the
CP 343-2. You will find the order number of the front connector in the Catalog
IK PI.

1 Technical Description
15
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1.3 Technical Specifications of the Module
The CP 343-2 / CP 343-2 P module has the following characteristics:
Table 1-1 Technical Specifications
Feature Explanation/Values
Bus cycle time 5 ms with 31 slaves
10 ms for 62 slaves with the extended
addressing mode
Depending on the slave profile, analog values
have longer update times.
Configuration Using buttons on the front panel or with
STEP 7
(download of the configuration with
FC “ASI_3422”, see section 5.1)
Supported AS-i master profiles M4
Connection of the AS-i cable Via S7-300 front connector with screw
contacts (20-pin)
Current load between contact 17 and 19 and
between 18 and 20 maximum 4 A
Address area 16 I bytes and 16 Q bytes in the analog area
of the S7-300
Current consumption from SIMATIC
backplane bus
Power supply SIMATIC backplane bus
Current consumption from the AS-i cable
Power supply from the AS-i cable
max. 200 mA
5 V DC
max. 100 mA
DC 29.5 to 31.6 V, according to the AS–i
specification
Ambient conditions
SOperating temperature
STransportation and storage temperature
SRelative humidity
S0..60_C (horizontal installation of the S7
standard rail)
S0..40_C (vertical installation of the S7
standard rail)
−40_C to +70_C
max. 95% at +25_C
Construction
SModule format
SDimensions (W x H x D) in mm
SWeight
Compact module S7-300, single width
40 x 125 x 115
approx. 200 g

1 Technical Description
16 CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
1.4 Approvals
Table 1-2 Description of the Approvals
c-UL-us UL 508
CSA C22.2 No. 142
c-UL-us for hazardous locations ANSI / ISA 12.12.01, CSA C22.2 No. 213−M1987
CL. 1, Div. 2 GP.A.B.C.D T4
CL. 1, Zone 2, GP.IIC, T4
CL. 1, Zone 2, AEx nC IIC T4
FM FM 3611
CL. 1, Div. 2 GP.A.B.C.D T4
CL. 1, Zone 2, GP.IIC. T4
Ta: 0...+60°C
C-TICK AS/NZS 2064 (Class A)
CE EN 61000-6-2, EN 61000-6-4 (replaces
EN 50081-2)
ATEX Zone 2 EN 60079-15:2005, EN 60079−0:2006
II 3 G Ex nA II T4
KEMA 08 ATEX 0003X
Note
The current approvals are printed on the module.

1 Technical Description
17
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
1.5 Displays and Operator Controls of the CP 343-2
The following diagram shows the front panel of the CP 343-2 with its indicators and
operator controls. The front connector for connecting the AS-i cable is below the
cover on the front of the CP 343-2.
AS-i+ (brown)
AS-i− (blue)
20
19
18
17
SF
RUN
APF
CER
AUP
CM
B
20+
10+
SET
9
8
7
6
5
4
3
2
1
0
Contacts 17, 19 and 18, 20 are jumpered internally on the CP 343-2.
Figure 1-3 Front Connector Pin Assignment and Labeling on the CP 343-2
The CP 343-2 has internal contacts for two AS-i cables that are jumpered internally
on the CP. This allows the CP 343-2 to be “looped” into the AS-i cable.
Notice
The load capacity of the contacts is a maximum of 4 A. If this value is exceeded
on the AS-i cable, the CP 343-2 must not be “looped into” the AS-i cable but must
be connected by a separate cable (only one pair of contacts used on the
CP 343-2).
For further information on connecting the AS-i cable, refer to Section 2.2.

1 Technical Description
18 CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
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Meaning of the Indicators and Operator Controls:
LED Meaning
SF System fault.
The LED is lit when:
SThe CP 343-2 is in the protected mode and an AS-i configuration error has
occurred (for example slave failed)
SThe CP detects an internal fault (for example EEPROM defective)
SIn response to a button command, the CP cannot execute the required mode
change at the present time (for example, because there is a slave with
address 0).
RUN Indicates that the CP has started up correctly.
APF AS-i Power Fail.
This indicates that the voltage supplied to the AS-i cable by the AS-i power
supply unit is too low or there is a complete power outage.
CER Configuration Error.
This LED indicates whether the slave configuration detected on the AS-i cable
matches the configuration configured on the CP (LPS). If they do not match, the
CER LED is lit.
The CER LED is lit in the following situations:
SWhen a configured AS-i slave does not exist on the AS-i cable
(for example failure of the slave).
SWhen a slave exists on the AS-i cable but it has not been configured
SWhen an attached slave has different configuration data (I/O configuration, ID code)
from the slave configured on the CP.
SWhen the CP is in the offline phase.
AUP Autoprog available.
In the protected mode of the CP, this indicates that automatic address
programming of a slave is possible. Automatic address programming makes it
easier to replace a defective slave on the AS-i cable (for more detailed
information, see Chapter 5.2.12).
CM Configuration Mode.
This LED indicates the mode.
Indicator on: configuration mode
Indicator on: protected mode

1 Technical Description
19
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
LED Meaning
SConfiguration Mode
The configuration mode is used during AS-i installation and commissioning.
In the configuration mode, the CP 343-2 can exchange data with every AS-i
slave connected to the AS-i cable (except for the AS-i slave with address ‘0’).
Any AS-i slaves that are added later are detected immediately by the master
and activated and included in the cyclic data exchange.
When installation and startup is completed, the CP 343-2 can be switched to
the protected mode using the SET button. Any AS-i slaves active at this point
are therefore configured.
The following data of the AS-i slaves is stored in non-volatile memory on the
CP 343-2:
− the PLC addresses
− the ID codes
− the I/O configuration
SProtected Mode
In the protected mode, the CP 343-2 exchanges data only with the configured
AS-i slaves. In this sense, “configured” means that the slave addresses and
the configuration data stored on the CP 343-2 match the values of existing
AS-i slaves.
SET Button
The SET button is required for configuring the CP 343-2 in standard operation. The
button is only activated when the PLC is in the STOP mode.
If the CP 343-2 is in the configuration mode (CM LED lit), the CP 343-2 is
configured automatically when the button is pressed. Configuration involves the
following steps:
1. The CP 343-2 saves the existing slave configuration as indicated by the LEDs
of the active slaves as the expected configuration.
2. The CP 343-2 then changes to the protected mode.
If the CP 343-2 is in the protected mode (“CM” LED is not lit), pressing the button
on the CP switches to the configuration mode.
For information on the method, refer to Section 1.6.
Display of the Detected and Activated AS-i Slaves
The detected and activated slaves are indicated by the LEDs 0 to 9 and the LEDs
10+, 20+, B. The activated slaves are displayed in groups of ten. The switchover is
time-controlled. The LEDs labeled 10+, 20+ indicate which group of 10 is currently
displayed by LEDs 0 to 9. If the “B” LED is lit, this indicates that the detected and
activated slaves are slaves from the extended address area B.

1 Technical Description
20 CP 343−2 / CP 343−2 P AS−Interface Master
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Characteristics of the Slave Display
SIf the CP 343-2 is in the configuration mode, all detected AS-i slaves are
displayed.
SIf the CP 343-2 is in the protected mode, all activated AS-i slaves are
indicated by the LED being permanently lit. Failed or existing but unconfigured
AS-i slaves are indicated by the corresponding LED flashing.
BB
Example 1
Indicates that the slaves with
addresses 1, 2 and 5 are detected
and activated.
Example 2
Indicates that the slaves with
addresses 20, 21 and 22 are
detected and activated.
Figure 1-4 Examples of the Display of Detected and Activated AS-i Slaves on the Front Panel of the
CP 343-2