Siemens Simatic S7-300 CP 341 User manual

Preface
Product Description
1
Basic Principles of Serial
Data Transmission
2
Commissioning the CP 341
3
Mounting the CP 341
4
Configuring and Parameter
Assignment the CP 341
5
Communication via Function
Blocks
6
Start-up Characteristics and
Operating Mode Transitions
of the CP 341
7
Diagnostics with the CP 341
8
Programming Example for
Standard Function Blocks
9
Technical Specifications
A
Connecting cables
B
Accessories and order
numbers
C
Literature on SIMATIC S7
D
SIMATIC
S7-300
CP 341 Point-to-Point
Communication, Installation and
Parameter Assignment
Manual
09/2008
A5E02191071-01
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Legal information
Warning notice system
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.
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.
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
property damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning and
operation 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.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be adhered to. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication 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
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E02191071-01
Ⓟ 08/2008
Copyright © Siemens AG 2008.
Technical data subject to change
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 3
Preface
Purpose of this manual
The information in this manual enables you to set up and commission a point-to-point
connection.
Contents of the manual
The manual describes the hardware and software of the CP 341 communication processor
and its integration in an S7-300 programmable controller. It is divided up into instruction-
based chapters and a reference section (appendices).
The following subjects are covered:
● The basics of the point-to-point connection with the CP 341
● Commissioning the CP 341
● Mounting the CP 341
● Communication via the CP 341
● Troubleshooting
● Application example
● Properties and technical specifications
Scope of the manual
The manual is relevant for:
Product Order number as of product version
CP 341-RS 232C 6ES7341-1AH02-0AE0 01
CP 341-20mA TTY 6ES7341-1BH02-0AE0 01
CP 341-RS 422/485 6ES7341-1CH02-0AE0 01
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Preface
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
4 Manual, 09/2008, A5E02191071-01
Changes Since Edition 04/2000
In contrast with edition 04/2000 of this manual, this edition describes the additional functions
of the CP 341 (as of order number 6ES7341-1_H02-0AE0).
● Baud-rate range extended to 115.2 kbaud
● Increase of maximum message frame length to 4 kbyte
● Addition of the printer driver
● Addition of identification data (I&M functions)
● Adjustable baud rate dependent waiting time for response message frames for protocol
RK512
● Adjustable extended error display on the receive FB
Note
The descriptions of the CP 341 communication processors in this manual were correct at the
time of publication. We reserve the right to describe modifications to the functionality of the
modules in a separate product information.
Conventions
The abbreviation CP 341 is used in this documentation when information applies to all three
module variants: CP 341-RS232C, CP 341-20mA TTY and CP 341-RS 422/485.
Navigation features of this manual
The manual's navigation features outlined below support quick access to specific
information:
● At the beginning of the manual you can find a comprehensive list of contents.
● In the main body of the text, the information in the left-hand column of each page
summarizes the contents of each section.
● Following the appendices, a glossary defines important technical terms used in the
manual.
● Finally, a comprehensive index allows quick access to information on specific subjects.
Electronic manuals
The entire set of SIMATIC S7 documentation is available on the SIMATIC S7 Collection
CD-ROM.
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Preface
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 5
Recycling and disposal
The CP 341 is an environment-friendly product. It's characteristic features include:
● In spite of its excellent resistance to fire, the flame-resistant agent in the plastic used for
the housing does not contain halogens.
● Laser inscriptions (i.e. no labels)
● Plastics identification in accordance with DIN 54840
● Fewer materials used due to size reduction; fewer parts due to integration in ASICs
The CP 341 is suitable for recycling on account of the low level of contaminants in its
components.
For further information about environment-friendly recycling and the procedure for disposing
of your old equipment, please contact:
Siemens Aktiengesellschaft
Plant Engineering and Technical Services
ATD TD 3 Recyling/Remarketing
P.O. Box 32 40
D-91050 Erlangen
Phone: [phone]
Fax: [phone]
This Siemens department offers individual consultation for a comprehensive and flexible
recycling and disposal system at a fixed price. Following disposal, you will receive
information giving you a breakdown of the relevant material fractions and the associated
material verification papers.
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Preface
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
6 Manual, 09/2008, A5E02191071-01
Additional support
If you have any unanswered questions regarding use of the products described in this
manual, please contact your local Siemens representative.
● You can locate your contact partner on this Internet URL:
http://www.siemens.com/automation/partner
● The portal to our technical documentation for the various SIMATIC products and systems
is available at:
http://www.siemens.com/simatic-tech-doku-portal
You will find the online catalog and the online ordering system at:
http://mall.automation.siemens.com/
Training center
We offer a range of relevant courses to help you to get started with the SIMATIC S7
automation system. Please contact your regional training center or the central training center
in D90327 Nuremberg, Germany.
● Phone: [phone].
● Internet: http://www.sitrain.com
Technical Support
How to contact Technical Support for all Industry Automation and Drive Technology products
● By submitting the Support Request web form
http://www.siemens.com/automation/support-request
● Phone: + 49 180 5050 222
● Fax: + 49 180 5050 223
You will find more information about our technical support on the Internet at
http://www.siemens.com/automation/service
Service & Support on the Internet
In addition to our documentation offering we provide our complete know-how for you online
at:
http://www.siemens.com/automation/service&support
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Preface
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 7
There you will find:
● The newsletter, which constantly provides you with up-to-date information on your
products
● Relevant documentation for your application, which you can access via the search
function in Product Support
● the bulletin board, a worldwide knowledge exchange for users and experts.
● Your local Industry Automation and Drive Technology representative in our contact
database
● Information about repairs, spare parts and consulting.
See also
Literature on SIMATIC S7 (Page 241)
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 9
Table of contents
Preface ........................................................................................................................................................ 3
1 Product Description . ................................................................................................................................. 17
1.1 Possible applications for the CP 341 . .........................................................................................17
1.2 Design of the CP 341..................................................................................................................20
1.3 Components for a Point-to-Point Connection with the CP 341. ..................................................22
1.3.1 Required Hardware Components ...............................................................................................22
1.3.2 Required Software Components. ................................................................................................23
1.4 Properties of the Serial Interface . ...............................................................................................24
1.4.1 RS 232C Interface of the CP 341-RS 232C ...............................................................................24
1.4.2 20mA-TTY interface of the CP 341-20mA TTY . .........................................................................25
1.4.3 X27 (RS 422/485) Interface of the CP 341-RS 422/485. ............................................................26
1.5 Cables for Connecting the Communication Processor to a Communication Partner. ................27
2 Basic Principles of Serial Data Transmission............................................................................................ 29
2.1 Serial Transmission of a Character . ...........................................................................................29
2.2 Transmission Procedure with a Point-to-Point Connection . .......................................................33
2.3 Transmission integrity . ................................................................................................................35
2.4 Data Transmission with the 3964(R) Procedure. ........................................................................38
2.4.1 Principle of the Data Transmission with the 3964(R) Procedure. ...............................................38
2.4.2 Control characters of the 3964(R) procedure . ............................................................................38
2.4.3 Block Checksum .........................................................................................................................39
2.4.4 Sending Data with 3964(R).........................................................................................................40
2.4.5 Receiving Data with 3964(R) . .....................................................................................................42
2.4.6 Handling Erroneous Data. ...........................................................................................................44
2.5 Data Transmission with the RK 512 Computer Connection . ......................................................50
2.5.1 Sending Data with RK 512..........................................................................................................53
2.5.2 Fetching Data with RK 512 . ........................................................................................................56
2.5.3 Quasi-Full-Duplex Operation ......................................................................................................59
2.5.4 RK 512 CPU Requests . ..............................................................................................................60
2.6 Data Transmission with the ASCII Driver . ..................................................................................62
2.6.1 Principle of the Data Transmission with the ASCII Driver . .........................................................62
2.6.2 Sending data with the ASCII driver. ............................................................................................62
2.6.3 Receiving data with the ASCII driver . .........................................................................................64
2.6.4 RS 485 mode ..............................................................................................................................71
2.7 Data transmission with the printer driver . ...................................................................................75
2.8 Configuration data.......................................................................................................................79
2.8.1 Configuration Data of the 3964(R) Procedure . ...........................................................................79
2.8.2 Configuration Data of the RK 512 Computer Connection. ..........................................................85
2.8.3 Configuration data of the ASCII Driver . ......................................................................................87
2.8.4 Parameter assignment data of the printer driver . .......................................................................94
2.8.5 Conversion and control statements for printout. .........................................................................99
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
10 Manual, 09/2008, A5E02191071-01
3 Commissioning the CP 341 . ................................................................................................................... 109
4 Mounting the CP 341 . ............................................................................................................................. 111
4.1 CP 341 slots............................................................................................................................. 111
4.2 Mounting and Dismounting the CP 341 ................................................................................... 112
4.2.1 Installation steps ...................................................................................................................... 112
4.2.2 Removal steps ......................................................................................................................... 113
4.2.3 Installation guidelines............................................................................................................... 113
5 Configuring and Parameter Assignment the CP 341 . ............................................................................ 115
5.1 Parameter Assignment Options . .............................................................................................. 115
5.2 Installing the Programming Interface . ...................................................................................... 116
5.3 Configuring the CP 341. ........................................................................................................... 117
5.4 Assigning Parameters to the Communications Protocols. ....................................................... 118
5.5 Identification data..................................................................................................................... 119
5.6 Managing the Parameter Data. ................................................................................................ 121
5.7 Subsequent Loading of Drivers (Transmission Protocols). ...................................................... 122
5.8 Firmware updates .................................................................................................................... 123
5.8.1 Subsequent Loading of Firmware Updates.............................................................................. 123
5.8.2 Viewing the Firmware Version . ................................................................................................ 126
6 Communication via Function Blocks . ...................................................................................................... 127
6.1 Overview of the Function Blocks. ............................................................................................. 128
6.2 Using function blocks . .............................................................................................................. 130
6.3 Using the Function Blocks with the 3964(R) Procedure . ......................................................... 131
6.3.1 S7 Sends Data to a Communication Partner. .......................................................................... 132
6.3.2 S7 receives data from a communication partner . .................................................................... 136
6.4 Using the Function Blocks with the RK 512 Computer Connection. ........................................ 140
6.4.1 Sending Data with FB P_SND_RK (Active Request). .............................................................. 142
6.4.2 Receiving Data with FB P_RCV_RK (Passive Request) . ........................................................ 147
6.4.3 Readying Data with FB P_RCV_RK (Passive Request) . ......................................................... 151
6.4.4 Fetching Data with P_SND_RK FB (Active Request) . ............................................................. 155
6.5 Using the System Function Blocks with the ASCII Driver. ....................................................... 160
6.5.1 Function blocks with ASCII driver . ........................................................................................... 160
6.5.2 Interface status of the CP 341, checking . ................................................................................ 161
6.5.3 Interface outputs of the CP 341, setting/resetting. ................................................................... 163
6.6 Use of function blocks to output message texts to a printer . ................................................... 165
6.7 Parameter assignment of the Function Blocks . ....................................................................... 170
6.7.1 General Information on Data Block Assignment. ..................................................................... 170
6.7.2 Supplying the block parameters............................................................................................... 172
6.8 General Information on Program Processing. .......................................................................... 177
6.9 Technical Specifications of the Function Blocks. ..................................................................... 178
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 11
7 Start-up Characteristics and Operating Mode Transitions of the CP 341............................................... 181
7.1 Operating Modes of the CP 341 . ..............................................................................................181
7.2 Startup Characteristics of the CP 341 . .....................................................................................182
7.3 Behavior of the CP 341 on Operating Mode Transitions of the CPU . ......................................184
8 Diagnostics with the CP 341. .................................................................................................................. 185
8.1 Diagnostics Functions of the CP 341. .......................................................................................185
8.1.1 Diagnostics via the display elements of the CP 341. ................................................................186
8.1.2 Diagnostics Messages of the Function Blocks .........................................................................187
8.1.3 Error Numbers in the Response Message Frame . ...................................................................200
8.1.4 Diagnostics via the diagnostic buffer of the CP 341 .................................................................201
8.1.5 Diagnostic Interrupt...................................................................................................................203
9 Programming Example for Standard Function Blocks. ........................................................................... 205
9.1 General Information ..................................................................................................................205
9.2 Device Configuration.................................................................................................................206
9.3 Settings .....................................................................................................................................207
9.4 Blocks Used ..............................................................................................................................208
9.5 Installation, Error Messages ................209 9.6 Activation, Start-Up Program and Cyclic Program.
..........210
A Technical Specifications . ........................................................................................................................ 213
A.1 Technical Specifications of the CP 341 .............................................213 A.2 Transmission Rates .
..........218
B Connecting cables . ................................................................................................................................. 221
B.1 RS 232C Interface of the CP 341-RS 232C .............................................................................221
B.2 20 mA TTY interface on the CP 341-20mA-TTY .
228 B.3 X27 (RS 422/485) Interface of the CP 341-RS 422/485. ...................................................235
C Accessories and order numbers . ............................................................................................................ 239
D Literature on SIMATIC S7. ...................................................................................................................... 241
D.1 Literature on SIMATIC S7. ........................................................................................................241
Glossary .................................................................................................................................................. 243
Index........................................................................................................................................................ 249
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
12 Manual, 09/2008, A5E02191071-01
Tables
Table 1- 1 CP 341 module variants............................................................................................................. 17
Table 1- 2 Functions of CP 341 module variants........................................................................................ 18
Table 1- 3 Hardware components for a point-to-point connection.............................................................. 22
Table 1- 4 Software components for a point-to-point connection with the CP 341. .................................... 23
Table 1- 5 RS 232C interface signals.......................................................................................................... 25
Table 2- 1 Structure of command message frame header (RK 512) .......................................................... 51
Table 2- 2 Monitoring time dependent on transmission rate for response message frame. ....................... 52
Table 2- 3 Structure of response message frame header (RK 512) ........................................................... 52
Table 2- 4 3964(R) protocol ........................................................................................................................ 80
Table 2- 5 Protocol parameters (3964(R) procedure)................................................................................. 81
Table 2- 6 Baud rate/Character frame (3964(R) procedure)....................................................................... 82
Table 2- 7 Receive Buffer on CP (3964(R) Procedure) .............................................................................. 83
Table 2- 8 X27 (RS 422) interface (3964(R) procedure)............................................................................. 83
Table 2- 9 RK512 computer connection...................................................................................................... 85
Table 2- 10 Receive Buffer on CP (3964(R) Procedure) .............................................................................. 86
Table 2- 11 Protocol Parameters (ASCII Driver)........................................................................................... 88
Table 2- 12 Baud rate/Character frame (ASCII driver).................................................................................. 89
Table 2- 13 Data flow control (ASCII driver) ................................................................................................. 90
Table 2- 14 Receive buffer on CP (ASCII driver) .......................................................................................... 91
Table 2- 15 X27 (RS 422/485) interface (ASCII driver)................................................................................. 92
Table 2- 16 Baud rate/Character frame (printer driver)................................................................................. 94
Table 2- 17 Data flow control (printer driver)................................................................................................. 95
Table 2- 18 X27 (RS 422/485) interface (ASCII driver)................................................................................. 95
Table 2- 19 Page layout (printer driver)......................................................................................................... 96
Table 2- 20 Character set (printer driver)...................................................................................................... 97
Table 2- 21 Control characters (printer driver) .............................................................................................. 97
Table 2- 22 Message texts (printer driver) .................................................................................................... 98
Table 2- 23 Display types in the conversion statement............................................................................... 101
Table 5- 1 Configuration options for the CP 341....................................................................................... 115
Table 5- 2 Data record structure ............................................................................................................... 119
Table 5- 3 Identification data ..................................................................................................................... 119
Table 5- 4 Identification data of the CP 341 module................................................................................. 120
Table 5- 5 LED indicators for firmware update.......................................................................................... 125
Table 6- 1 Function blocks / functions of the CP 341................................................................................ 128
Table 6- 2 FB P_SND_RK parameters...................................................................................................... 134
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 13
Table 6- 3 FB P_RCV_RK parameters. ......................................................................................................138
Table 6- 4 FB 8 P_SND_RK parameters for "Send data" request . ............................................................144
Table 6- 5 Information in the RK 512 message frame header for "Send data" request. ............................145
Table 6- 6 FB 7 P_RCV_RK parameters for "Receive data" request . .......................................................149
Table 6- 7 FB 7 P_RCV_RK parameters for "Provide data" request . ........................................................153
Table 6- 8 FB 8 P_SND_RK parameters for "Fetch data" request. ............................................................157
Table 6- 9 Transmittable data types for "Fetch data" request. ...................................................................158
Table 6- 10 Information in the RK 512 message frame header for "Fetch data" request. ...........................158
Table 6- 11 FC 5 V24_STAT parameters. ....................................................................................................162
Table 6- 12 FC 6 V24_SET parameters. ......................................................................................................164
Table 6- 13 FB 13 P_PRINT_RK parameters . .............................................................................................168
Table 6- 14 Memory requirements of the function blocks/functions in bytes. ..............................................178
Table 6- 15 Minimum number of CPU cycles...............................................................................................178
Table 8- 1 Event classes and event numbers............................................................................................188
Table 8- 2 Event class 30...........................................................................................................................199
Table 8- 3 Error messages in the response message frame with RK 512 . ...............................................200
Table A- 1 General technical specifications . ..............................................................................................213
Table A- 2 Technical specifications of the RS 232C interface . ..................................................................214
Table A- 3 Technical specifications for the 20mA-TTY interface . ..............................................................214
Table A- 4 Technical specifications of the X27 (RS 422/485) interface . ....................................................215
Table A- 5 Technical specifications for the 3964(R) procedure . ................................................................215
Table A- 6 Technical specifications of the RK 512 computer link . .............................................................216
Table A- 7 Technical specifications for the ASCII driver . ...........................................................................216
Table A- 8 Additional parameters of end-of-frame detection. .....................................................................217
Table A- 9 Technical specifications for the printer driver . ..........................................................................217
Table A- 10 Transmission times for the ASCII driver ...................................................................................218
Table A- 11 Transmission times with the 3964(R) procedure . .....................................................................218
Table A- 12 Transmission times with the RK 512 computer link. .................................................................219
Table B- 1 Pin assignment for the sub D male connector of the integrated interface of the CP 341-
RS 232C....................................................................................................................................221
Table B- 2 Pin assignment for the 9-pin sub D female connector of the integrated interface of the
CP 341-20mA-TTY ...................................................................................................................228
Table B- 3 Pin assignment for the 15-pin sub D female connector of the integrated interface of the
CP 341-RS 422/485..................................................................................................................235
Table C- 1 Order numbers of the module variants of the CP 341 . .............................................................239
Table C- 2 Order numbers of the connecting cables. .................................................................................239
Table D- 1 Manuals for configuring and programming the S7–300. ...........................................................241
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
14 Manual, 09/2008, A5E02191071-01
Figures
Figure 1-1 Positions of the module elements on the CP 341 communication processor. ........................... 20
Figure 1-2 Bus connector ............................................................................................................................ 21
Figure 2-1 10-bit character frame ................................................................................................................ 31
Figure 2-2 Character delay time.................................................................................................................. 32
Figure 2-3 Position of the supplied protocols of the CP 341 in the reference model . ................................. 35
Figure 2-4 Block Checksum ........................................................................................................................ 39
Figure 2-5 Data traffic when sending with the 3964(R) procedure. ............................................................. 40
Figure 2-6 Data traffic when receiving with the 3964(R) procedure. ........................................................... 42
Figure 2-7 Data traffic when erroneous data is received............................................................................. 44
Figure 2-8 Data traffic in the event of an initialization conflict ..................................................................... 45
Figure 2-9 Flow diagram of the start-up of the 3964(R) Procedure . ........................................................... 46
Figure 2-10 Flow Diagram of Sending with the 3964(R) Procedure . ............................................................ 47
Figure 2-11 Flow Diagram for Receiving with the 3964(R) Procedure (Part 1). ............................................ 48
Figure 2-12 Flow diagram for receiving with the 3964(R) procedure (Part 2). .............................................. 49
Figure 2-13 Data traffic when sending with a response message frame . ..................................................... 53
Figure 2-14 Sequence of a continuation SEND message frame with a continuation response message
frame .......................................................................................................................................... 55
Figure 2-15 Data traffic when fetching with a response message frame . ..................................................... 56
Figure 2-16 Sequence of a continuation FETCH message frame with a continuation response
message frame .......................................................................................................................... 58
Figure 2-17 Quasi-full-duplex mode .............................................................................................................. 59
Figure 2-18 Flow diagram of data transmission with the RK 512 when CPU requests are made . ............... 60
Figure 2-19 Flow diagram of data transmission with the RK 512 when partner requests are made . ........... 61
Figure 2-20 Flowchart of a send operation.................................................................................................... 63
Figure 2-21 Flow diagram for receiving with end criterion "Expiration of character delay time" . .................. 65
Figure 2-22 Flow diagram for receiving with end criterion "End-of-text character" . ...................................... 67
Figure 2-23 Flow diagram for receiving with end criterion "Fixed message frame length" . .......................... 69
Figure 2-24 Timing diagram of automatic control of the RS 232C accompanying signals . .......................... 73
Figure 2-25 Flow chart of printout.................................................................................................................. 77
Figure 2-26 Wiring of the receiver at the X27 (RS 422) interface (3964(R) procedure) . .............................. 84
Figure 2-27 Wiring of the receiver at the X27 (RS 422/485) interface (ASCII driver) . .................................. 93
Figure 2-28 Schematic structure of the format string .................................................................................... 99
Figure 2-29 Schematic structure of a conversion statement. ...................................................................... 100
Figure 2-30 Schematic structure of control statements. .............................................................................. 106
Figure 4-1 Connection terminal ................................................................................................................. 113
Figure 6-1 Time sequence chart of FB 8 P_SND_RK . .............................................................................. 135
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 15
Figure 6-2 Time sequence chart of FB 7 P_RCV_RK ................................................................................139
Figure 6-3 FB 8 P_SND_RK time sequence chart for "Send data" request. ..............................................145
Figure 6-4 Time sequence chart of FB 7 P_RCV_RK for "Receive data" request. ....................................150
Figure 6-5 Time sequence chart of FB 7 P_RCV_RK for "Provide data" request. .....................................154
Figure 6-6 Time sequence chart of FB 8 P_SND_RK for "Fetch data" request . ........................................159
Figure 6-7 Structure of the POINTER DB for the FB P_PRINT_RK function block . ..................................167
Figure 6-8 Time sequence chart for FB 13 P_PRINT_RK. .........................................................................169
Figure 6-9 Comparison of data addressing in STEP 5 and STEP 7. .........................................................170
Figure 8-1 Structure of the STATUS parameter.........................................................................................187
Figure 8-2 Example: Structure of the STATUS parameter for the the "Request canceled due to
complete restart, restart or reset" event. ...................................................................................187
Figure B-1 RS 232C connecting cable CP 341 - CP 340/CP 341/CP 441. ................................................222
Figure B-2 RS 232C connecting cable (CP 341 - CP 544, CP 524, CPU 928B, CPU 945, CPU 948 . ......223
Figure B-3 RS 232C connecting cable CP 341 - CP 521 SI/CP 521 BASIC. .............................................224
Figure B-4 RS 232C connecting cable CP 341 - CP 523...........................................................................225
Figure B-5 RS 232C connecting cable CP 341 - IBM Proprinter. ...............................................................226
Figure B-6 RS 232C connecting cable CP 341 - laser printer....................................................................227
Figure B-7 Block diagram for the 20mA-TTY interface...............................................................................229
Figure B-8 20mA-TTY connecting cable CP 341 - CP 340/CP 341/CP 441 . .............................................230
Figure B-9 20mA-TTY connecting cable CP 341 - CP 544, CP 524, CPU 928B, CPU 945, CPU 948 . ...231
Figure B-10 20mA-TTY connecting cable CP 341 - CP 523 ........................................................................232
Figure B-11 20mA-TTY connecting cable CP 341 - CP 521 SI/CP 521 BASIC. ..........................................233
Figure B-12 20mA-TTY connecting cable CP 341 - CPU 944/AG 95 . .........................................................234
Figure B-13 X27 connecting cable CP 341 - CP 340/CP 341/CP 441 for RS 422 mode (four-wire) . ..........236
Figure B-14 X27 connecting cable CP 341 - CP 340/CP 341/CP 441 for RS 485 mode (two-wire).............237
Figure B-15 X27 connecting cable CP 341 - CP 544, CP 524, CPU 928B, CPU 945, CPU 948 for
RS 422 mode (four-wire)...........................................................................................................238
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
16 Manual, 09/2008, A5E02191071-01
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 17
Product Description 1
1.1 Possible applications for the CP 341
The CP 341 communication processor enables you to exchange data between automation
devices or computers by means of a point-to-point connection.
Functionality of the CP 341
The CP 341 communication processor provides the following functionality:
● Transmission rate up to 115.2 kbaud, half duplex
● Integration of the most important transmission protocols in the module firmware:
– 3964(R) procedure
– RK 512 computer link
– ASCII driver
– Printer driver
● Subsequent loading of other drivers (transmission protocols) with the CP 341: Point-to-
Point Communication, Parameter Assignment parameter assignment interface.
● Adaptation of the transmission protocols using the CP 341: Point-to-Point
Communication, Parameter Assignment parameter assignment interface
● Integrated serial interface:
Three module variants are available, each having a different interface type that is suitable
for different communication partners (see following table).
Module variants
The following variants of the CP 341 communication processor are available:
Table 1- 1 CP 341 module variants
Module Order number Integrated interface
CP 341-RS 232C 6ES7341-1AH02-0AE0 RS 232C interface
CP 341-20mA-TTY 6ES7341-1BH02-0AE0 20mA-TTY interface
CP 341-RS 422/485 6ES7341-1CH02-0AE0 X27 (RS 422/485) interface
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Product Description
1.1 Possible applications for the CP 341
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
18 Manual, 09/2008, A5E02191071-01
Functions of module variants
Different driver functions can be used depending on the module variant of the CP 341:
Table 1- 2 Functions of CP 341 module variants
Function CP 341-
RS 232C
CP 341-
20mA-TTY
CP 341-RS 422/485
RS 422* RS 485*
ASCII driver: Yes Yes Yes Yes
Control of RS 232C accompanying signals Yes No No No
Controlling/reading of RS 232C
accompanying signals with FBs
Yes No No No
RTS/CTS flow control Yes No No No
XON/XOFF flow control Yes Yes Yes No
3964(R) procedure Yes Yes Yes No
RK 512 computer link Yes Yes Yes No
Printer driver Yes Yes Yes Yes
* The RS 422 and RS 485 are differentiated through parameter assignment.
Uses of the CP 341
The CP 341 communication processor enables a point-to-point connection with various
Siemens modules and with non-Siemens products:
● SIMATIC S5 via the 3964(R) driver or RK 512 with corresponding interface module on S5
side
● Siemens PDA terminals from the ES 2 family via 3964(R) driver
● MOBY I (ASM 420/421, SIM), MOBY L (ASM 520) and ES 030K data acquisition terminal
via 3964R driver
● PCs via the 3964(R) procedure (the following development tools are available for
programming on PCs: PRODAVE DOS 64R (6ES5 897–2UD11) for MS-DOS,
PRODAVE WIN 64R
(6ES5 897-2VD01) for Windows or the ASCII driver)
● Barcode readers via the 3964(R) or ASCII driver
● Non-Siemens PLCs via the 3964(R) driver, ASCII driver, or RK 512
● Other devices with simple protocol structures by means of appropriate protocol
adaptation with the ASCII driver
● Other devices that also have a 3964(R) driver or RK 512
● Printers (HP Deskjet, HP Laserjet, Postscript, Epson, IBM)
The CP 341 can also be operated in a distributed configuration using the ET 200M (IM153)
I/O device.
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Product Description
1.1 Possible applications for the CP 341
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 19
The CP 341 can be operated in a PROFINET IO network if
● the corresponding PROFINET IO controller is integrated in the SIMATIC STEP 7 CPU,
● FB7 (P_RCV_RK) / FB8 (P_SND_RK) - blocks with versions higher than or equal to V3.0
are used.
Note
The CP 341 modules (6ES7341-1xH0y-0AE0) cannot be operated behind the external
communication processors CP 342-5 (Profibus DP) and CP 343-1 (Profinet IO)!
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com

Product Description
1.2 Design of the CP 341
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
20 Manual, 09/2008, A5E02191071-01
1.2 Design of the CP 341
The CP 341 communication processor is supplied with an integrated serial interface.
Positions of the module elements
The diagram shows the arrangement of the module elements on the front panel of the
CP 341 communication processor.
6)
7['
5['
0
/
0
,QGLFDWRUV
,QWHJUDWHGLQWHUIDFH
)URQWGRRU
&RQQHFWLRQIRU'&9
VXSSO\
)DVWHQLQJVFUHZ
Figure 1-1 Positions of the module elements on the CP 341 communication processor
LED indicators
The following LED indicators are located on the front panel of the communication processor:
● SF (red) error LED
● TxD (green) interface transmitting
● RxD (green) interface receiving
Section "Diagnostics via the display elements of the CP 341 (Page 186)" describes the
operating states and errors that these LEDs indicate. Section "Subsequent Loading of
Firmware Updates (Page 123)" provides information on the LED indicators that occur when
loading a firmware update.
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com