Siemens SIMATIC SM 335 User Manual
Preface, Contents
SIMATIC
SM 335 – High-Speed
Analog Input/Output Module for
the SIMATIC S7-300
Manual
Characteristics and Technical
Specifications of the SM 335
Connecting the Inputs and
Outputs of the SM 335
Data Exchange with the SM 335
Interval Counter Input
Special SM 335 Operating Modes
Detecting and Correcting Faults
List of Abbreviations
Index
1
2
3
4
5
6
A
08/2004 Edition
6ES7 335-7HG00-8BA1
OChapter
Safety-Related Guidelines
This manual contains notices intended to ensure personal safety, as well as to protect the products and
connected equipment against damage. These notices are highlighted by a warning triangle and are graded
according to severity by the following texts:
Danger
!
Indicates that death, severe personal injury or substantial property damage will result if proper
precautions are not taken.
Warning
!
Indicates that death, severe personal injury or substantial property damage can result if proper
precautions are not taken.
Caution
!
Indicates that minor personal injury or property damage can result if proper precautions are not taken.
Caution
indicates that property damage can result if proper precautions are not taken.
Notice
contains important information about the product, its operation or a part of the document, to which special
attention is drawn.
Qualified Personnel
A device/system may only be commissioned or operated by qualified personnel. Qualified personnel as
referred to in the safety guidelines in this document are persons authorized to start up, ground and tag
circuits, equipment and systems in accordance with established safety practice.
Proper Usage
Please observe the following:
Warning
!
Registered Trademarks
The equipment/system or the system components may only be used for the applications described in the
catalog or the technical description, and only in combination with the equipment, components, and
devices of other manufacturers as far as this is recommended or permitted by Siemens.
The product will function correctly and safely only if it is transported, stored, set up, and installed as
intended, and operated and maintained with care.
SIMATIC, SIMATIC HMI and SIMATIC NET are registered trademarks of SIEMENS AG.
Other designations used in this document may be registered trademarks; the owner’s rights may be viola-
ted if they are used by third parties for their own purposes.
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
Automation & Drives
Motion Control Systems
P.O. Box 3180, D-91050 Erlangen
Index-2
Siemens Aktiengesellschaft
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
Exclusion of LiabilityCopyright W Siemens AG, 1999 – 2004. All rights reserved
We have checked the contents of this manual for agreement with the
hardware 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.
Siemens AG, 2004.
Technical data subject to change.
6ES7 335-7HG00-8BA1
Preface
Important
In order to obtain SIMATIC interference immunity, the SM 335 module must
always be operated with an interference suppression filter (see Section 2.6).
Content of this manual
This manual describes the function of the SM 335 analog input/output module;
AI4/AO4 x 14/12 bits. In the following, this module will simply be called SM 335.
Aim of this manual
The information contained in this manual will enable you to:
• Use a SM 335 in a SIMATIC S7-300.
• See operator inputs, function descriptions and technical specifications in con-
nection with the SM 335.
Scope of this manual
The manual is valid for the following modules:
Module Order Number From Revision Level
SM 335 6ES7 335-7HG01-0AB0 02
This manual contains the descriptions of these modules that are valid at the time
the manual is released. For new modules and new versions of modules, we reserve the right to add to the manual a product information containing the current
information about this module. Section 1.2 describes how to determine the revision
level of a module.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
iii
PrefacePreface
Scope of the documentation package
You can order the documentation for the SM 335 separately from the module.
The order number for the manual appears in the table below:
Documentation Order Number
• SM 335 - High-Speed Analog Input/Output
Module for the SIMATIC S7-300
Other references
More information about using and installing SIMATIC S7-300 analog modules can
be found in:
• SIMATIC Programmable Controller, S7-300 Module Data Reference Manual
• SIMATIC S7-300, Hardware and Installation Manual
6ES7 335-7HG00-8BA1
The installation guidelines described in this document also relate to the SM 335.
Required basic knowledge
This manual assumes general knowledge of automation engineering.
Knowledge of the SIMATIC S7 programmable controller and the STEP 7 Engineering System is also required.
Approbations
The S7-300 programmable controller has obtained the following approvals:
• Underwriters Laboratories, Inc.: UL 508 registered (Industrial Control Equip-
ment)
• Canadian Standards Association: CSA C22.2 number 142, (Process Con-
trol Equipment)
• Factory Mutual Research: Approval Standard Class Number 3611.
CE Approval
The S7-300 programmable controller meets the requirements and safety-related
requirements of the following EC directives:
• EC Directive 73/23/EEC “Low-Voltage Directive”
• EC Directive 89/336/EEC “EMC Directive”
iv
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
C-Tick-Mark
The S7-300 programmable controller meets the requirements of the AS/NZS 2064
standard (Australia and New Zealand).
Standards
The S7-300 programmable controller meets the requirements and criteria of the
IEC 61131-2 standard (Programmable Controllers, Part 2: Equipment Requirements and Tests).
How the manual fits in
PrefacePreface
Manual
• CPU 31xC and CPU 31x, Technical Specifi-
cations
Reference Manual
• CPU data: CPU 312 IFM - 318-2 DP
Manual
• S7-300, CPU 31xC and CPU 31x: Hard-
ware and Installation
Installation Manual
• S7-300 Programmable Controller: Hardware
and Installation: CPU 312 IFM - 318-2 DP
System Manual
• PROFINET system description
Programming Manual
• From PROFIBUS DP to PROFINET IO
Manual
• CPU 31xC: Technological Functions
• Examples
Reference Manual
• S7-300 Programmable Controller:Module
Data
Operation and display elements, communication, memory concept, cycle and
response times, technical specifications.
Operation and display elements, communication, memory concept, cycle and
response times, technical specifications.
Configuration, installation, wiring, addressing, commissioning, maintenance,
diagnostics, and interference suppression.
Configuration, installation, wiring, addressing, commissioning, maintenance,
diagnostics, and interference suppression.
Basic information about PROFINET:
Network components, data exchange
and communication, PROFINET IO,
component based automation, application example PROFINET IO and component based automation.
Guide to migration from PROFIBUS DP
to PROFINET IO.
Description of individual technological
functions: Positioning, counting,
point-to-point coupling, control.
The CD contains examples for the technological functions.
Descriptions of functions and technical
specifications of signal modules, power
supply modules and interface modules.
Instruction List
• CPU 312 IFM - 318-2 DP
• CPU 31xC and CPU 31x
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
The instruction set lists of the CPUs and
their execution times;
A list of executable blocks.
v
PrefacePreface
Getting Started
The Getting Started documents below are available as an anthology:
• CPU 31x: Commissioning
• CPU 31xC: Commissioning
• CPU 31xC: Positioning with analog output
• CPU 314C: Positioning with digital output
• CPU 31xC: Counting
• CPU 31xC: Rules
• CPU 31xC: Point-to-point connection
• CPU 31x-2 PN/DP: Commissioning of a
PROFINET IO subnet
Manual
You are reading manual
• SM 335 - High-Speed Analog Input/Output
Module for the SIMATIC S7-300
Reference Manual
System software for the S7-300/400 system
and standard functions
Manual
SIMATIC NET: Twisted Pair and Fiber Optic Networks
Manual
Component based Automation:
Configuring systems with SIMATIC iMap
Manual
Programming with STEP 7 V5.3
Manual
Communication with SIMATIC
Getting Started documents use a concrete example to guide you through the
individual commissioning steps until you
have a functioning application.
Description of how you use the SM 335
module in a SIMATIC S7-300.
Overview of operations, descriptions of
functions and technical specifications of
the SM 335.
Description of system functions (SFC),
system function blocks (SFB) and organization blocks (OB).
This manual is part of the STEP 7 documentation package.
The description can also be found in the
STEP 7 online help.
Description of industrial Ethernet networks, network configuration, components, installation guidelines for networked automation systems in buildings,
etc.
Description of SIMATIC iMAP configuration software.
Programming with STEP 7.
Fundamentals, services, networks, communication functions, connection of
PG/OP, configuration in STEP 7.
Additional Support
Please contact your local Siemens representative if you have any queries about
the product described in this manual, which are not answered here.
http://www.ad.siemens.com/automation/partner
vi
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Training center
We offer a range of relevant courses to help you to get started with the
SIMATIC S7 programmable controller. Please contact your local training center or
the central training center in Nuremberg, D 90327 Germany.
Phone: +49 (911) 895-3200
Internet: http://www.sitrain.com
A&D Technical Support
Worldwide, available 24 hours a day:
Johnson City
PrefacePreface
Nuremberg
Beijing
Technical Support
Worldwide (Nuremberg)
Technical Support
Local time: 24 hours a day,
Phone: +49 (180) 5050-222
Fax: +49 (180) 5050-223
E-mail: adsupport@
GMT: +1:00
Europe/Africa (Nuremberg)
Authorization
Local time: Mon.-Fri. 8:00 AM
Phone: +49 (180) 5050-222
Fax: +49 (180) 5050-223
E-mail: adsupport@
GMT: +1:00
The languages of the technical support and authorization hotlines are generally German and English.
365 days a year
siemens.com
to 5:00 PM
siemens.com
United States (Johnson City)
Technical Support and
Authorization
Local time: Mon.-Fri. 8:00 AM
to 5:00 PM
Phone: +1 (423) 262 2522
Fax: +1 (423) 262 2289
E-mail: simatic.hotline@
sea.siemens.com
GMT: –5:00
Asia/Australia (Beijing)
Technical Support and
Authorization
Local time: Mon.-Fri. 8:30:00
to 5:00 PM
Phone: +86 10 64 75 75 75
Fax: +86 10 64 74 74 74
E-mail: adsupport.asia@
siemens.com
GMT: +8:00
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
vii
PrefacePreface
Service & Support on the Internet
In addition to our documentation, our whole range of expertise can be accessed
online at:
http://www.siemens.com/automation/service&support
Where you will find:
• The Newsletter, which constantly provides you with up-to-date information
about your products.
• The documents you need via our Search function in Service & Support.
• A forum, where users and experts from all over the world exchange their experi-
ences.
• Your local representative for Automation & Drives, via our database of repre-
sentatives.
• Information about field service, repairs and spare parts. Much more can be
found under “Services”.
Queries
If you have any queries about the S7-300 programmable controller, please contact
your local Siemens representative.
In case you have any questions or suggestions concerning this manual, please fill
in the correction sheet and return it to us. The correction sheet can be found at the
end of the manual.
viii
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Contents
1 Characteristics and Technical Specifications of the SM 335 1-1. . . . . . . . . . . . . . . .
1.1 Characteristics features of the SM 335 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Terminal connection diagram for the SM 335 1-3. . . . . . . . . . . . . . . . . . . . . . . .
1.3 Block diagram of the SM 335 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Setting the measuring range with the measuring range module 1-6. . . . . . . .
1.5 Technical specifications for the SM 335 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1 General technical specifications 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2 Technical specifications for the analog inputs 1-8. . . . . . . . . . . . . . . . . . . . . . . .
1.5.3 Technical specifications for the analog outputs 1-10. . . . . . . . . . . . . . . . . . . . . .
1.5.4 Technical specifications for the interval counter 1-11. . . . . . . . . . . . . . . . . . . . . .
1.6 SM 335 operating modes 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.1 Free Cycle mode 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2 Conditional Cycle mode 1-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Connecting the Inputs and Outputs of the SM 335 2-1. . . . . . . . . . . . . . . . . . . . . . . .
2.1 Basic information about connecting the SM 335 2-2. . . . . . . . . . . . . . . . . . . . .
2.2 Connecting the analog inputs 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Connecting the analog outputs 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Connecting the interval counter input 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Connecting the sensor power supply 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5.1 Correcting the sensor power supply 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Interference suppression filter for 24 V supply voltage 2-10. . . . . . . . . . . . . . . .
3 Data Exchange with the SM 335 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Access via the I/O addresses 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Output values 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 Output values 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.3 Analog value representation for analog input channels 3-8. . . . . . . . . . . . . . . .
3.1.4 Analog value representation for analog output channels 3-10. . . . . . . . . . . . . .
3.2 Setting parameters via HW Config 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 SM 335 default settings 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 SM 335 parameters assignable with HW Config 3-13. . . . . . . . . . . . . . . . . . . . .
3.3 Modifying SM 335 parameters with the help of system function 55 3-16. . . . .
3.3.1 SM 335 static parameters 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 SM 335 parameters in the Free Cycle and Conditional Cycle Modes 3-18. . . .
3.3.3 SM 335 parameter for “Comparator” mode 3-23. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 SM 335 parameters for “Measuring Only” special mode 3-27. . . . . . . . . . . . . . .
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
ix
ContentsContents
3.4 Evaluating SM 335 diagnostics 3-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Hardware interrupt 3-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 Format of diagnostic data for the SM 335 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3 Module diagnostic byte 1 (byte 0) 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.4 Module diagnostic byte 2 (byte 1) 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.5 Module diagnostic byte 3 (byte 2) 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.6 Module diagnostic byte 4 (byte 3) 3-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.7 Channel-specific diagnostic bytes (bytes 4-15) 3-37. . . . . . . . . . . . . . . . . . . . . .
4 Interval Counter Input 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Principle of an interval counter 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Principles of measuring with the interval counter 4-3. . . . . . . . . . . . . . . . . . . . .
4.3 Wiring the interval counter input 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Initializing the SM 335’s interval counter input 4-7. . . . . . . . . . . . . . . . . . . . . . .
4.5 Interval counter values 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Example for determining the speed by means of the interval counter 4-9. . .
5 Special SM 335 Operating Modes 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Switching to the special operating modes 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 “Comparator” mode 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 How comparator mode works 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 SM 335 parameters for Comparator mode 5-10. . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 “Measuring Only” mode 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Switching to “Measuring Only” mode 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Detecting and Correcting Faults 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Principle of diagnostics 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Configuring diagnostics with HW Config 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Evaluating diagnostic data in OB 82 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4 SM 335 error tree 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 Troubleshooting 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A List of Abbreviations A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
x
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
SIMATIC S7-300
The SM 335 is an input/output module (signal module) for the SIMATIC S7-300.
The SM 335 has the same general technical specifications as all signal modules of
the SIMATIC S7-300.
Order number
Order the SM 335 under the following order number:
6ES7 335-7HG01-0AB0
In this chapter
We deal with the following topics in this chapter:
Topic Section
Characteristics of the SM 335 1.1
1
Terminal connection diagram for the SM 335 1.2
Block diagram of the SM 335 1.3
Setting the measuring range with the measuring range module 1.4
Technical specifications for the SM 335 1.5
Operating modes of the SM 335 1.6
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-1
Characteristics and Technical Specifications of the SM 335
1.1 Characteristics features of the SM 335
Characteristic features
The SM 335; AI4/AO4 14/12 bit has the following characteristic features:
Analog inputs:
• Four isolated analog inputs
• Integrated 10 V/25 mA sensor power supply
• Measured-value resolution:
– Bipolar: 13 bits + sign
– Unipolar: 14 bits
• Selectable measured value:
– Two voltage inputs
– Two inputs, which can be used as either current or voltage inputs
Analog outputs:
• Four isolated analog outputs
• Selectable range for each analog output
For the analog outputs, you can connect loads over a two-wire connection only!
• Analog value resolution:
– Bipolar: 11 bits + sign
– Unipolar: 12 bits
Operating modes:
• 2 standard operating modes:
– Free cycle
– Conditional cycle
• 2 special operating modes:
– Comparator
– Measuring Only
Interrupts/diagnostics:
• Programmable diagnostics
1-2
• Programmable diagnostic interrupt
• Programmable end-of-cycle interrupt (generates a hardware interrupt on the
CPU)
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
1.2 Terminal connection diagram for the SM 335
Terminal connection diagram
Figure 1-1 shows the terminal connections for the SM 335 analog input/output
module.
Fault LEDs – red
SF
Reserved
Analog inputs:
Voltage/
current measurement
L+
24 V
M
0+
CH0
M
0–
M
1+
CH1
M
1–
M
2+
CH2
M
2–
M
3+
CH3
M
3–
IZ
M
M
Interval counter IZ
IZ
M
Analog outputs:
Voltage output
Sensor
power
supply
L+
QV
QV
QV
QV
M
QV
M
M
0
1
2
3
ANA
Ref
ANA
24 V
CH0
CH1
CH2
CH3
10 V
M
Revision level
Connection
Diagram
Fig. 1-1 Terminal connection diagram of the SM 335
Wiring
See Chapter 2 and to the SIMATIC S7-300, Hardware and Installation Manual for
information about how to wire inputs and outputs on the SM 335.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Terminal
1-3
Characteristics and Technical Specifications of the SM 335
Revision Level
Products with the same number can be distinguished by the revision level.
The revision level is incremented by upwardly-compatible function expansions or
fault corrections.
The revision level of the module is identified by “X” (see Figure 1-1); in this case
the revision level is 1.
1-4
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
1.3 Block diagram of the SM 335
Block diagram
Figure 1-2 shows the block diagram of the SM 335. You will find detailed technical
specifications for the SM 335 on the following pages.
Internal power supply
SIMATIC S7-300
backplane bus
Galvanic isolation
Logic
A
D
Open-wire
test circuit
24 V
CH0
Analog outputs
CH1
CH2
CH3
10 V
Sensor power
supply
CH0
A
D
CH1
Analog inputs
CH2
CH3
IZ
Interval Counter Input
Fig. 1-2 Block Diagram of the SM 335
Galvanic isolation
As you can see from Figure 1-2, the SM 335 contains different analog parts.
The analog outputs are isolated from the backplane bus of the SIMATIC S7-300.
The outputs are on the same potential M
same potential M
as the analog outputs.
ANA
The analog inputs are isolated from each other and from the backplane bus of the
SIMATIC S7-300.
The input for the interval counter IZ is isolated from the other analog parts and
from the backplane bus of the SIMATIC S7-300.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
ANA
. The output for sensor supply has the
1-5
Characteristics and Technical Specifications of the SM 335
1.4 Setting the measuring range with the measuring range module
Measuring range module
A measuring range module is located on the left of the input/output module. The
measuring range module is used to set the method of measuring on the analog
inputs, that is, to choose between voltage and current measuring.
Settings
The measuring range module can be set for “A”, “C” or “D”.
The default setting is “D”.
Table 1-1 shows the allocation of measuring range module settings to possible
connections of the analog inputs.
The measuring range is set using HW Config. You can select from different current
or voltage ranges (see Section 3.2).
The required measuring range module setting is also displayed in HW Config.
Table 1-1 Measuring range module settings and measuring range defaults on the
SM 335
Setting of the measuring
range module
A Input 0: Voltage "10 V
B Not assigned –
C Input 0: Voltage "10 V
D Input 0: Voltage "10 V
Analog input
wiring
Input 1: Voltage "10 V
Input 2: Voltage "10 V
Input 3: Current 4 to 20 mA
Input 1: Voltage "10 V
Input 2: Current 4 to 20 mA
Input 3: Current 4 to 20 mA
Input 1: Voltage "10 V
Input 2: Voltage "10 V
Input 3: Voltage "10 V
Measuring range
(default value)
1-6
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
1.5 Technical specifications for the SM 335
1.5.1 General technical specifications
Table 1-2 General technical specifications
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 120
Weight Approx. 300 g
Module-specific data
Number of inputs 4
Number of outputs 4
Cable length shielded 200 m
With open-wire test in the range 0 to 10 V 30 m
Voltages, currents, potentials
Rated load voltage L+
• Polarized
Galvanic isolation
Permissible potential difference
• Between inputs (U
• Between input (M terminal) and central
grounding point
• Isolation tested with 500 V DC
CM
)
3 V/1.5 V (10 V ranges)
24 V DC
Yes
Yes
75 V DC/60 V AC
Power consumption
• From SIMATIC S7-300 backplane bus
• From L+
• Module power loss
Status, interrupts, diagnostics
Interrupts
• Comparator interrupt
• End-of-cycle interrupt
• Diagnostic interrupt
Diagnostic functions
• Fault indication on the module in the event
of a group fault
• Diagnostic information can be read out
Miscellaneous
UL/CSA/FM Yes
Max. 75 mA
Max. 150 mA
Max. 3.6 W
NO
Yes, programmable
Yes, programmable
Yes, programmable
Yes, red LED
Yes
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-7
Characteristics and Technical Specifications of the SM 335
1.5.2 Technical specifications for the analog inputs
Table 1-3 Technical specifications for the analog inputs
Noise suppression and error limits for the inputs
Suppression of noise voltage for
f = n x (f1"1%), (f1 = interference frequency)
• Common-mode noise (U
• Series-mode noise
(peak noise value < rated value of the input range)
Crosstalk between inputs
• At 50 Hz
• At 60 Hz
Operational limit for voltage measuring
(over entire temperature range,
based on input range)
Operational limit for current measuring
(over entire temperature range, based on input range)
pp
< 3 V)
> 65 dB
0 dB
–65 dB
–65 dB
" 0.15%
(for 14-bit resolution)
0.25%
Basic error
(operational limit at 25 °C, based on input range)
Temperature drift (based on input range) " 0.13%
Linearity error (based on input range) " 0.015%
Repeatability
(in steady state at 25 °C, based on input range)
Sensor selection data
Input ranges (rated values)/input resistance
• Voltage
• Current (max. 2 channels)
Permissible input voltage for voltage input
(destruction limit)
Permissible input current for current input
(destruction limit)
Connecting of sensors
" 1 V
" 10 V
" 2.5 V
0 to 2 V
0 to 10 V
" 10 mA
0 to 20 mA
4 to 20 mA
• For measuring voltage
" 0.1%
(for 14-bit resolution)
" 0.05%
"30 V
25 mA
Possible
• For measuring current
– As 2-wire measuring transducer
– As 4-wire measuring transducer
• For measuring resistance
Not possible
Possible
Not possible
10 MW
10 MW
10 MW
10 MW
10 MW
100 W
100 W
100 W
1-8
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
Table 1-3 Technical specifications for the analog inputs
Analog value formation for the outputs
Measuring principle Successive approximation
Conversion time (per channel) in ms
• Basic conversion time for 4 channels in ms
Resolution
• Bipolar
• Unipolar
Data of output to sensor supply
Rated voltage 10 V
Max. output current 25 mA
Short-circuit-proof Yes
Operational limit
(over entire temperature range)
Temperature drift 0.002%/K
Basic error for rated voltage 0.1%
Max. 200
Max. 1
13 bits + sign
14 bits
0.2%
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-9
Characteristics and Technical Specifications of the SM 335
1.5.3 Technical specifications for the analog outputs
Table 1-4 Technical specifications for the analog outputs
Analog value formation for the outputs
Resolution (incl. overrange)
• " 10 V
• From 0 to 10 V
Conversion time in ms Max. 800
Setting time
• For resistive load
• For capacitive load
• For inductive load
Injection of substitute values Ye s
Noise suppression and error limits for the outputs
Crosstalk between outputs –40 dB
Operational limit (over entire temperature
range, based on output range)
Basic error
(operational limit at 25_C, based on output range)
Temperature drift
(based on output range)
Linearity error (based on output range) " 0.05%
Repeatability
(in steady state at 25 _C, based on output range)
Output ripple (based on output range) " 0.05%
Actuator Selection Data
Output range (rated values) " 10 V
Burden resistance
• For voltage outputs
• For capacitive load
• For inductive load
Voltage output
• Short-circuit protection
• Short-circuit current
Connection of actuators
• For voltage output
– 2-wire connection
– 4-wire connection (measuring circuit)
11 bits + sign
12 bits (+ sign)
t 0.1 ms
v 3.3 ms
t 0.5 ms
0.5%
0.2%
0.02%/K
" 0.05%
From 0 to 10 V
Min. 3 kW
Max. 1 mF
Max. 1 mH
Yes
Max. 8 mA
Possible
Not possible
1-10
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
1.5.4 Technical specifications for the interval counter
Table 1-5 Technical specifications for the interval counter
Interval-counter-specific data
Number of inputs 1
Cable length shielded 200 m
Voltages, currents, potentials
Rated load voltage L+
• Polarized
Galvanic isolation Yes
Permissible potential difference
• Interval counter input (M
to the four analog inputs
• Between input (M
point
Measuring principle Detection of a rising edge and
Resolution of the time difference 0.5 ms
Max. frequency
IZ
Analog value formation for the interval counter input
• Programmable
• Interference suppression for
interference frequency f1 in dB
Noise suppression and error limits for the input
Noise suppression for
F = n (f1 " 1%), (f1 = interference frequency)
• Common-mode noise (U
• Series-mode noise
(peak noise value t rated value of the input range)
Operational limit
(over entire temperature range)
Basic error
(operational limit at 25 oC)
Temperature drift (0 to 60 oC) " 0.003%/K
Linearity error 0
terminal)
IZ
terminal) and central grounding
t 3 V)
pp
75 V DC/60 V AC
75 V DC/60 V AC
measuring the amount of time
between two edges
Max. 1% at 400 Hz
24 V DC
Yes
400 Hz
NO
0
u 80 dB
0 dB
0.005%
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-11
Characteristics and Technical Specifications of the SM 335
Table 1-5 Technical specifications for the interval counter
Sensor selection data
Permissible input voltage (destruction limit) " 30 V
Permissible input current for interval input (destruction
limit)
Minimum permissible pulse widths at the counter input
• “Low”
• “High”
Permissible voltage range between IZ and MIZ terminals
• For “Low” pulse
• For “High” pulse
5 mA
1 ms
1 ms
– 30 V to + 5 V
(– 4.4 mA to 0.7 mA)
+ 18 V to + 30 V
(2.5 mA to 4.4 mA)
1-12
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
1.6 SM 335 operating modes
Operating modes
The SM 335 can operate in the following modes:
• Free cycle (corresponds to HW Config setting for SM 335: 0.5 ms cycle time)
• Conditional cycle (corresponds to HW Config setting for SM 335:
1 to 16 ms cycle time)
Special operating modes
In addition, the SM 335 can be switched to the following modes for a brief period of
time:
• “Comparator” special mode
• “Measuring Only” special mode
The special operating modes are described in Chapter 5, where there is also a description of how to switch to the special operating modes.
1.6.1 Free Cycle mode
Cycle
In conjunction with the SM 335, the word “cycle” is used to mean the measuring of
the analog value at all analog inputs in succession. Once the measuring cycle is
complete and all inputs have been read, the cycle starts again from the beginning.
This cycle has nothing to do with cyclic program scanning on a SIMATIC S7 CPU.
Free Cycle
When the SM 335 operates in Free Cycle mode, all SM 335 analog inputs and outputs are processed successively and without interruption. After all inputs and outputs have been processed, conversion once again begins with the first analog input.
Free Cycle mode is activated when a cycle time of 0.5 ms is set for the SM 335 in
HW Config.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-13
Characteristics and Technical Specifications of the SM 335
Figure 1-3 shows the various components of the cycle time for a free cycle.
Conversion time for analog input
channel CH3
Conversion time for analog input
channel CH2
Conversion time for analog input
channel CH1
Conversion time for analog input
channel CH0
Conversion time for analog output
channel CH3
Cycle
time
Conversion time for analog output
channel CH2
Conversion time for analog output
channel CH1
Conversion time for analog output
channel CH0
Fig. 1-3 Cycle time for the SM 335 free cycle
The execution times in Free Cycle mode are comprised as follows:
• Base load of a cycle: approx. 200 µs
• Execution times for the reading in of an analog channel: approx. 200 µs
• Execution time for the output of an analog value: approx. 50 µs
1-14
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Characteristics and Technical Specifications of the SM 335
The SM 335 only updates the relevant analog output channel when modifications
are made to the output value.
• Four activated input channels and four activated output channels with the re-
quired output, which is dependent on constantly changing values, yields a cycle
time of 1200 µs (200 µs + 4 x 200 µs + 4 x 50 µs).
• Four activated input channels and four activated output channels with unchanged or rarely changing output values, yields a cycle time of 1000 µs
(200 µs + 4 x 200 µs + 4 x 0 µs).
• One activated input channel and four activated output channels with unchanged
or rarely changing output values, yields a cycle time of 400 µs (200 µs +
1 x 200 µs + 4 x 0 µs).
Deselecting diagnostics does not affect the cycle time.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
1-15
Characteristics and Technical Specifications of the SM 335
1.6.2 Conditional Cycle mode
Conditional Cycle
In the conditional cycle operating mode, you can define the cycle time. Following conversion of all analog inputs, the SM 335 can generate an end-of-cycle interrupt to the CPU (see Subsection 3.4.1 Hardware Interrupt). The SM 335 then
waits while the analog outputs are updated and begins the next processing cycle
after the specified cycle time has expired.
The end-of-cycle interrupt can be used to synchronize a user program via OB 40.
Furthermore, the interrupt enables high-speed processing of the user program
(e.g., for closed-loop control routines).
Conditional Cycle mode is activated when a cycle time of 1 to 16 ms is set for the
SM 335 in HW Config.
Figure 1-4 shows the various components of the cycle time for a conditional cycle.
Yes
Time condition:
Start new cycle
every 1 ms, 1.5 ms, etc., up to 16 ms
Conversion time for analog input
channel CH3
Conversion time for analog input
channel CH2
Conversion time for analog input
channel CH1
Conversion time for analog input
channel CH0
Optional
NO
Updating of the analog outputs
End-of-cycle
interrupt
1-16
Fig. 1-4 Cycle time for a conditional SM 335 cycle
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Connecting the Inputs and Outputs of the SM 335
Assembly
Before connecting the SM 335, you must first assemble the SM 335. The SM 335
is assembled in the same way as all other SIMATIC S7-300 I/O modules. Please
read the SIMATIC S7-300 Hardware and Installation Manual.
SIMATIC S7-300
When connecting the SM 335, please note the installation guidelines in the
SIMATIC S7-300 Hardware and Installation Manual. In the SM 335 Manual, we
describe special features that only apply to the SM 335.
In this chapter
We deal with the following topics in this chapter:
2
Topic Section
Basic information about connecting the SM 335 2.1
Connecting the analog inputs 2.2
Connecting the analog outputs 2.3
Connecting the interval counter input 2.4
Connecting the sensor supply 2.5
Interference suppression filter for 24 V supply voltage 2.6
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
2-1
Connecting the Inputs and Outputs of the SM 335
2.1 Basic information about connecting the SM 335
Connecting the analog inputs and outputs
You can find detailed information about connecting the analog inputs and outputs in
the SIMATIC Programmable Logic Controller, S7-300 Module Data Reference Ma-
nual.
Rules
The following applies:
• The cables must be twisted-pair cables, protected against interference and
shielded.
• The accuracy of your measurements depends on the following:
– Load
Power supply
The SM 335 must be supplied with 24 V DC. The 24 V must be connected to
L+ (PIN 1), the 24 V’s zero potential to M (PIN 20).
Grounding
You can ground the 24 V power supply in the following way:
• Direct on the 24 V power supply unit or
• On the S7 CPU (if you use the 24 V power supply on the CPU).
– Cable between the SM 335 and the load
– Reference voltage
2-2
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Connecting the Inputs and Outputs of the SM 335
2.2 Connecting the analog inputs
Recommendation
The high conversion speed of the SM 335 means that the interference produced
can have a negative effect on the measurement input voltages in particular.
The configuration described below is in general the configuration, which is least
susceptible to interference.
The SM 335’s analog inputs and the associated zero potential should be connected to a terminal block, and the zero potential for the analog inputs distributed over the block.
Configuration
The result is the following basic configuration:
Twisted-pair,
shielded
Terminal block
Sensor 0
Sensor 1
Sensor 2
Sensor 3
Sensor 3
CGP=Central Grounding Point
Fig. 2-1 Connecting Sensors to the Analog Inputs on the SM 335
CGP
SM 335
6 M
ANA
9M
10 M
11 M
12 M
13 M
14 M
15 M
16 M
0+
0–
1+
1–
2+
2–
3+
3–
CH0
CH1
CH2
CH3
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
2-3
Connecting the Inputs and Outputs of the SM 335
Non-Isolated
In contrast to other applications (e. g., when connecting thermocouples), you
should ground the sensors’ analog zero potential in the vicinity of the SM 335. The
easiest way to do so is to connect pins 10, 12, 14 and 16 with analog zero potential
M
(PIN 6) and connect M
ANA
central grounding point (CGP) of the module. This connection should be as short
as possible.
Do not ground the sensors twice, however, as this would produce ground loops,
which could result in interference. When using sensors, which are shielded and
whose shields are connected to the analog zero potential, you must disconnect the
shield from the analog zero potential.
in the vicinity of the module in the rack with the
ANA
Limited potential difference U
Only a limited potential difference UCM (common mode voltage) may occur between the measuring lines M- of the input channels and the reference point of the
measuring circuit M
ANA
In order to prevent the permissible value being exceeded, you must take various
action, described below, depending on the potential connection of the sensors.
For details please see the SIMATIC Programmable Logic Controller, S7-300 Mod-
ule Data Reference Manual.
If you use the SM 335 isolated, the maximum permissible common mode voltage
must not be exceeded between the zero potential of the sensor and M
wise the SM 335 triggers a diagnostic alarm and 7FFFH is read in from the relevant
channel.
60 V AC/75 V DC must not be exceeded between M
24 V voltage supply.
Unused analog inputs
Unused analog inputs on the SM 335 must be short-circuited and connected to
M
. Deactivate the unused analog inputs as described in HW Config. This
ANA
achieves the optimum in interference immunity for the SM 335 and the cycle time
is reduced in the operating mode “free cycle”.
CM
.
and the ground of the
ANA
ANA
, other-
2-4
You can also employ unused analog inputs to monitor the sensor power supply or
analog outputs. This also enhances interference immunity.
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
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