Siemens SIMATIC CP 340 User manual

PtP coupling and configuration of CP
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SIMATIC
S7-300
PtP coupling and configuration of
CP 340
Manual
04/2011
A5E00369892-03
Preface
Product Description
1
Basic Principles of Serial
Data Transmission
2
Starting up the CP 340
3
Mounting the CP 340
4
Configuring and
Parameterizing the CP 340
5
Communication using
function blocks
6
Startup
7
Diagnostics with the CP 340
8
Programming Example for
Standard Function Blocks
9
Technical Specifications
A
Connecting Cables
B
Accessories and Order
Numbers
C
Literature on SIMATIC S7
D

Legal information
Legal information
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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 relevant 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 product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
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 complied with. The information in the relevant documentation must be observed.
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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
A5E00369892-03
Ⓟ 06/2011
Copyright © Siemens AG 2011.
Technical data subject to change

PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 3
Preface
Purpose of the manual
This manual explains how to establish and operate a point-to-point connection.
Content of the manual
This manual describes the hardware and software of communication processor CP 340, and
its implementation into the S7-300 automation system. It consists of an instruction section
and also contains reference material (appendices).
Topics covered:
● The basics of point-to-point connections with the CP 340
● Starting up the CP 340
● Mounting the CP 340
● Communication via the CP 340
● Troubleshooting
● Application example
● Features and technical specifications
Scope of the manual
The manual is relevant for:
Product Order number From edition
CP 340-RS 232C 6ES7 340-1AH02-0AE0 01
CP 340-20mA-TTY 6ES7 340-1BH02-0AE0 01
CP 340-RS 422/485 6ES7 340-1CH02-0AE0 01
Note
The description of the CP 340 communication processor contained in this manual is correct
at the date of publication. We reserve the right to describe changes to module functionality in
a Product Information.

Preface
PtP coupling and configuration of CP 340
4 Manual, 04/2011, A5E00369892-03
Certifications
You can find detailed information about certificates, approvals and standards in the manual
S7-300 Automation System; S7-300 Module Specifications .
Assistance in using the manual
This manual has the following features to help you to find the information you need quickly:
● In the chapters, the information in the left-hand column of each page summarizes the
content of each section.
● Following the appendices, a glossary defines important technical terms used in the
manual.
● At the end of the manual a comprehensive index facilitates quick access to information
relating to specific subjects.
Additional assistance
Please contact your local Siemens representative if you have any queries about the products
described in this manual.
● You will find contact details for your representative at:
http://www.siemens.com/automation/partner
● You will find the guide to the technical documentation for the individual SIMATIC products
and systems at:
http://www.siemens.com/simatic-doku
● You will find the online catalog and online ordering system at:
http://www.siemens.com/automation/mall
Conventions
The abbreviation CP 340 is used in this manual when information applies to all three module
variants: CP 340-RS 232C, CP 340-20mA TTY and CP 340-RS 422/485.

Preface
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 5
Training centers
We offer a range of courses to help get you started with the S7 programmable controller.
Please contact your regional training center, or the central training center in Nuremberg,
Germany.
Internet: http://www.siemens.com/sitrain
Technical support
You can access technical support for all A&D products
● Via the support request form available online
http://www.siemens.com/automation/support-request
Additional information about our technical support is available in the Internet at:
http://www.siemens.com/automation/service&support
Service & Support on the Internet
Supplementary to our documentation offers, we provide a comprehensive online knowledge
base on the Internet.
http://www.siemens.com/automation/service&support
There you will find:
● The newsletter, which is constantly updated to provide you with the latest information
about your products
● The right documents via our Search function under Service & Support
● A forum, where users and experts from all over the world exchange their experiences
● Your local representative for Automation & Drives via our representatives database
● Information about on-site service, repairs and spare parts Lots more is available to you in
the "Service" section.

Preface
PtP coupling and configuration of CP 340
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PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 7
Table of contents
Preface ...................................................................................................................................................... 3
1 Product Description ................................................................................................................................. 11
1.1 Uses of the CP 340......................................................................................................................11
1.2 Components for a Point-to-Point Connection with the CP 340....................................................14
1.2.1 Required Hardware Components ................................................................................................14
1.2.2 Software Components for a Point-to-Point Connection with the CP 340 ....................................15
1.3 Design of the CP 340...................................................................................................................16
1.4 Properties of the serial interface ..................................................................................................18
1.4.1 RS 232C interface of the CP 340–RS 232C................................................................................18
1.4.2 20mA–TTY interface on the CP 340–20mA-TTY.........................................................................20
1.4.3 X27 (RS 422/485) Interface of the CP 340–RS 422/485.............................................................21
2 Basic Principles of Serial Data Transmission........................................................................................... 23
2.1 Serial Transmission of a Character .............................................................................................23
2.2 Transmission mode in Point-to-Point Communication.................................................................28
2.3 Transmission integrity ..................................................................................................................30
2.4 Data Transmission with the 3964(R) Procedure..........................................................................32
2.4.1 Control characters........................................................................................................................32
2.4.2 Block Checksum ..........................................................................................................................33
2.4.3 Sending Data with 3964(R)..........................................................................................................34
2.4.4 Receiving Data with 3964(R) .......................................................................................................38
2.4.5 Handling Errored Data .................................................................................................................43
2.5 Data transfer using the ASCII driver ............................................................................................46
2.5.1 RS 232C accompanying signals..................................................................................................46
2.5.2 Sending Data with the ASCII Driver.............................................................................................50
2.5.3 Receiving Data with the ASCII Driver ..........................................................................................51
2.5.4 BREAK - Monitoring on CP 340...................................................................................................55
2.5.5 Receive Buffer on CP 340 ...........................................................................................................55
2.6 Data transmission with the printer driver .....................................................................................56
2.7 Parameterization Data .................................................................................................................61
2.7.1 Basic parameters of the CP 340..................................................................................................61
2.7.2 Parameterization Data of the 3964(R) Procedure .......................................................................62
2.7.3 Parameterization data of the ASCII driver ...................................................................................66
2.7.4 Parameterization data of the printer driver ..................................................................................72
2.7.5 Conversion and Control Statements for Printer Output ...............................................................77

Table of contents
PtP coupling and configuration of CP 340
8 Manual, 04/2011, A5E00369892-03
3 Starting up the CP 340 ............................................................................................................................ 87
4 Mounting the CP 340 ............................................................................................................................... 89
4.1 CP 340 slots................................................................................................................................ 89
4.2 Installing and removing the CP 340 ............................................................................................ 90
4.2.1 Installation steps ......................................................................................................................... 90
4.2.2 Removal steps ............................................................................................................................ 91
5 Configuring and Parameterizing the CP 340............................................................................................ 93
5.1 Parameterization Options............................................................................................................ 93
5.2 Parameterizing the Communications Protocols.......................................................................... 94
5.2.1 Parameterization of the CP 340.................................................................................................. 94
5.2.2 Installing the engineering tool ..................................................................................................... 95
5.3 Configuring the CP 340............................................................................................................... 96
5.4 Managing the Parameter Data.................................................................................................... 97
5.5 Identification data ........................................................................................................................ 98
5.6 Download of firmware updates ................................................................................................. 100
6 Communication using function blocks.................................................................................................... 103
6.1 Communication via Function Blocks ......................................................................................... 103
6.2 Overview of the Function Blocks............................................................................................... 104
6.3 Using the function blocks for connecting to a communications processor ............................... 105
6.3.1 S7 sends data to a communication partner .............................................................................. 105
6.3.2 S7 receives data from a communication partner ...................................................................... 109
6.4 Using function blocks for the output of message texts to a printer ........................................... 113
6.5 Use of function blocks for reading and controlling the RS 2332C secondary signals .............. 118
6.6 Delete receive buffer, FB12 "P_RESET" .................................................................................. 121
6.7 General Information on Program Processing............................................................................ 124
6.8 Technical data of the function blocks........................................................................................ 125
7 Startup................................................................................................................................................... 127
7.1 Operating Modes of the CP 340 ............................................................................................... 127
7.2 Startup Characteristics of the CP 340....................................................................................... 128
7.3 Behavior of the CP 340 on Operating Mode Transitions of the CPU........................................ 129
8 Diagnostics with the CP 340.................................................................................................................. 131
8.1 Diagnosis via the Display Elements of the CP 340................................................................... 133
8.2 Diagnostics Messages of the Function Blocks P_SEND, P_RCV and P_PRINT ..................... 134
8.3 Diagnostics via the S7-300 backplane bus ............................................................................... 142
8.4 Diagnostics by means of the diagnostic buffer of the CP 340 .................................................. 144

Table of contents
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 9
9 Programming Example for Standard Function Blocks............................................................................ 147
9.1 Device Configuration..................................................................................................................148
9.2 Settings ......................................................................................................................................149
9.3 Blocks Used ...............................................................................................................................150
9.4 Example “Point–to–Point Communication” ................................................................................151
9.5 Example "Printing" and "Reading and Controlling the CP 340 Inputs/Outputs" ........................153
9.6 Installation, Error Messages ......................................................................................................155
9.7 Activation, Start-Up Program and Cyclic Program.....................................................................156
A Technical Specifications ........................................................................................................................ 159
A.1 Technical Specifications of the CP 340 .....................................................................................159
A.2 Recycling and Disposal..............................................................................................................164
B Connecting Cables ................................................................................................................................ 165
B.1 RS 232C interface of the CP 340–RS 232C..............................................................................165
B.2 20 mA TTY interface on the CP 340-20mA-TTY .......................................................................173
B.3 X27 (RS 422/485) Interface of the CP 340–RS 422/485 ...........................................................180
C Accessories and Order Numbers........................................................................................................... 185
D Literature on SIMATIC S7...................................................................................................................... 187
Glossary ................................................................................................................................................ 191
Index...................................................................................................................................................... 197

Table of contents
PtP coupling and configuration of CP 340
10 Manual, 04/2011, A5E00369892-03

PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 11
Product Description 1
1.1 Uses of the CP 340
Introduction
The communication processor allows you to exchange data between programmable
controllers or computers by means of point-to-point communication.
Functionality of the CP 340
The CP 340 communication processor provides the following functionality:
● Transmission rate up to 19.2 Kbaud, half duplex
● Integration of the most important transmission protocols in the module firmware:
– 3964(R) procedure
– ASCII driver
– Printer driver
● Adaptation of transmission protocols by means of parameter assignment with the CP 340
parameter assignment user interface: Point-to-point communication, parameter
assignment
● Integrated serial interface:
Three module variants are available, each having a different interface type that is suitable
for different communication partners (see Module variants table).
Module variants
The following variants of the CP 340 communication processor are available:
Table 1- 1 Module variants of the CP 340 communication processor
Module Order number Integrated interface
CP 340–RS 232C 6ES7340–1AH02–0AE0 RS 232C interface
CP 340–20mA–TTY 6ES7340–1BH02–0AE0 20mA-TTY interface
CP 340–RS 422/485 6ES7340–1CH02–0AE0 X27 (RS 422/485) interface

Product Description
1.1 Uses of the CP 340
PtP coupling and configuration of CP 340
12 Manual, 04/2011, A5E00369892-03
Functions of module variants
The functionality of the drivers depends on the module variant of the CP 340:
Table 1- 2 Functions of CP 340 module variants
Function CP 340–RS 232C CP 340–20mCP TTY CP 340 RS 422* CP 340 RS 485*
ASCII driver Yes Yes Yes Yes
Operating the 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
Printer driver Yes Yes Yes Yes
RTS/CTS flow control Yes No No No
XON/XOFF flow control Yes Yes Yes No
* The RS 422 and RS 485 differ in respect of their parameter assignments.
Possible applications for the CP 340
The CP 340 communication processor supports point-to-point communication with various
Siemens modules and with non-Siemens products:
● SIMATIC S5 via the 3964(R) driver with corresponding interface module on S5 side
● Siemens BDE terminals 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
● SIMOVERT and SIMOREG (USS protocol) via the ASCII driver (CP 340-RS 422/485),
with appropriate adaptation of the protocol using a STEP 7 program
● PCs via the 3964(R) procedure (the following development tools are available for
programming on PCs for MS DOS or for Windows: PRODAVE S5 DOS/Win 64R
(6ES5 897-2VD01))
● Barcode readers via the 3964(R) or ASCII driver
● Non-Siemens PLCs via the 3964(R) or ASCII driver
● 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
● Printers (HP Deskjet, HP Laserjet, Postscript, Epson, IBM)

Product Description
1.1 Uses of the CP 340
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 13
The CP 340 can also be operated in a distributed configuration using the ET 200M (IM153)
I/O device.
Note
The CP 340 modules (6ES7 340-1xH0y-0AE0) cannot be operated downstream from the
external communication CPs CP 342-5 (PROFIBUS DP) and CP 343-1 (PROFINET IO).

Product Description
1.2 Components for a Point-to-Point Connection with the CP 340
PtP coupling and configuration of CP 340
14 Manual, 04/2011, A5E00369892-03
1.2 Components for a Point-to-Point Connection with the CP 340
Introduction
The PtP connection between the communication processor and a communication partner
requires specific hardware and software components.
1.2.1 Required Hardware Components
Hardware Components
The table below describes the hardware components for a point-to-point connection.
Table 1- 3 Hardware Components for a Point-to-Point Connection with the CP 340
Components Function Diagram
Mounting rack ... provides the mechanical and electrical
connections of the S7–300.
Power supply module (PS) ... converts the line voltage (120/230 VAC) into the
operating voltage of 24 VDC required to supply the
S7-300.
Central Processing Unit (CPU)
Accessories:
Memory Card
Backup battery
... executes the application program;
communicates via the MPI interface with other
CPUs or with a programming device.
Communications processor ... communicates via the interface with a
communication partner.
Standard Connecting Cable ... connects the communications processor to the
communication partner.

Product Description
1.2 Components for a Point-to-Point Connection with the CP 340
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 15
Components Function Diagram
Standard connecting cable ... connects a CPU to a programming device/PC.
Programming device (PG) or PC ... communicates with the CPU of the S7-300.
1.2.2 Software Components for a Point-to-Point Connection with the CP 340
Software components
The following table lists the software components required for establishing a point-to-point
connection with the CP 340.
Table 1- 4 Software components for a point-to-point connection with the CP 340
Components Function Diagram
STEP 7 software package ... configures, assigns parameters,
programs and tests the S7-300.
+/LFHQVH
Parameter assignment interface
Assigning parameters to point-to-point
connections
... parameterizes the interface of the
CP 340.
Function blocks (FBs) with
programming example
... control communication between the
CPU and the CP 340.

Product Description
1.3 Design of the CP 340
PtP coupling and configuration of CP 340
16 Manual, 04/2011, A5E00369892-03
1.3 Design of the CP 340
Introduction
The CP 340 communication processor is supplied with an integrated serial interface.
Positions of module elements
The figure shows the positions of the module elements on the front panel of the CP 340
communication processor.
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Figure 1-1 Positions of the module elements on the CP 340 communication processor

Product Description
1.3 Design of the CP 340
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 17
LED display elements
The following LED display elements are located on the front panel of the communication
processor:
SF (red) Error display
TxD (green) Interface sending
RxD (green) Interface receiving
Section "Diagnosis via the Display Elements of the CP 340 (Page 133)" describes the
operating states and errors that these LEDs indicate.
Integrated interface
The CP 340 is available in three variants with different interface types:
● RS 232C
● X27 (RS 422/485)
● 20mA-TTY
The interface types are indicated on the front of the CP 340. A detailed interface description
can be found in Section "Properties of the serial interface (Page 18)".
Bus connector for the S7 rear panel bus
A bus connector is supplied with the CP 340. The bus connector is plugged onto the back
panel of the CP 340 when it is mounted. The S7-300 rear panel bus is connected via the bus
connector.
The S7-300 rear panel bus is a serial data bus via which the CP 340 communicates with the
modules of the programmable controller and is supplied with the necessary voltage.
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Figure 1-2 Connector S7

Product Description
1.4 Properties of the serial interface
PtP coupling and configuration of CP 340
18 Manual, 04/2011, A5E00369892-03
1.4 Properties of the serial interface
Introduction
Three module variants of the CP 340 are available, each having a different interface type
that is suitable for different communication partners. For point-to-point connections between
the CP 340 and a communication partner, Siemens offers standard connecting cables in
various lengths.
1.4.1 RS 232C interface of the CP 340–RS 232C
Features
The RS 232C interface is a voltage interface used for serial data transmission in compliance
with the RS 232C standard.
Type: Voltage interface
Front connector: 9-pin sub D male connector with screw-locking
RS 232C signals: TXD, RXD, RTS, CTS, DTR, DSR, RI, DCD, GND;
all isolated from the S7-internal power supply
Max. transmission
rate:
19.2 kbps (3964(R) procedure)
9.6 kbps (ASCII driver, printer driver)
Max. cable length: 15 m, cable type LIYCY 7 x 0.14
Standard: DIN 66020, DIN 66259
EIA-RS 232C CCITT V.24/V.28
Degree of protection: IP 00

Product Description
1.4 Properties of the serial interface
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03 19
RS 232C signals
The table below shows the meaning of the RS 232C accompanying signals.
Table 1- 5 RS 232C interface signals
Signal Designation Meaning
TXD Transmitted Data Transmitted data; transmission line is maintained at logic "1" by the communication
processor in idle state.
RXD Received Data Received data; receive line must be maintained at logic "1" by communication
partner.
RTS Request To Send RTS "ON": Communication processor is ready to send.
RTS "OFF": Communication processor is not sending.
CTS Clear to send Communication partner can receive data from the communication processor. The
communication processor expects this signal in response to RTS "ON".
DTR Data terminal ready DTR "ON": Communication processor is active and ready for operation.
DTR "OFF": Communication processor is not active and not ready for operation.
DSR Data Set Ready DSR "ON": Communication partner is active and ready for operation.
DSR "OFF": Communication partner is not active and not ready for operation.
RI Ring Indicator Incoming call when connecting a modem
DCD Data carrier detect Carrier signal when connecting a modem

Product Description
1.4 Properties of the serial interface
PtP coupling and configuration of CP 340
20 Manual, 04/2011, A5E00369892-03
1.4.2 20mA–TTY interface on the CP 340–20mA-TTY
Definition
The 20mA-TTY interface is a current-loop interface used for serial data transmission.
Features
The 20mA-TTY interface has the following features and meets the following requirements:
Type: Current-loop interface
Front connector: 9-pin sub D socket with screw-locking
20mA TTY signals Two isolated 20 mA current sources, receiving loop (RX) "–" and "+" send
loop (TX) "–" and "+"; all isolated from the S7-internal power supply
Max. baud rate: Baud rate: 9.6 kbps
Max. cable length: 100 m active, 1000 m passive;
Cable type LIYCY 7 x 0.14
Standard: DIN 66258 Part 1
Degree of protection: IP 00