Siemens Simatic S7-1500 User manual

Manual
Analog input module AI 8xU/I HS (6ES7531-7NF10-0AB0)
07/2014Edition
Answers for industry.
SIMATIC
S7-1500

Analog Input Module AI 8xU/I HS
(6ES7531-7NF10-0AB0)
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SIMATIC
S7-1500/ET 200MP
Analog Input Module AI 8xU/I HS
(6ES7531-7NF10-0AB0)
Manual
07/2014
A5E03484886
-AC
Preface
Documentation guide
1
Product overview
2
Wiring
3
Parameters/address space
4
Interrupts/diagnostics alarms
5
Technical specifications
6
Dimensional drawing
A
Parameter data records
B
Representation of analog
values
C
Open Source Software
D

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Industry Sector
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GERMANY
A5E03484886-AC
Ⓟ
07/2014 Subject to change
Copyright © Siemens AG 2014.
All rights reserved
Legal information
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DANGER
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WARNING
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CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
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
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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.

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC 3
Preface
Purpose of the documentation
This manual supplements the system manuals:
●S7-1500 Automation System
●ET 200MP Distributed I/O System
Functions that relate in general to the systems are described in these system manuals.
The information provided in this manual and in the system/function manuals supports you in
commissioning the systems.
Changes compared to previous version
Changes described in this manual, compared to the previous version:
●Module integrated in hardware catalog STEP 7 (TIA Portal) V13, Update 3 or higher with
the functions:
–Module-internal shared input (MSI) for Shared Device
–Configurable submodules, e.g., for Shared Device
●Appendix Open Source Software amended
Conventions
The term "CPU" is used in this manual both for the CPUs of the S7-1500 automation system,
as well as for interface modules of the ET 200MP distributed I/O system.
Please also observe notes marked as follows:
Note
A note contains important information regarding the product described in the documentation
or its handling, or draws special attention to a
section of the documentation.

Preface
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
4Manual, 07/2014, A5E03484886-AC
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. You can find more information about industrial security on the Internet
(http://www.siemens.com/industrialsecurity).
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. You can find more information on the Internet
(http://support.automation.siemens.com).
Open Source Software
Open-source software is used in the firmware of the product described. Open Source
Software is provided free of charge. We are liable for the product described, including the
open-source software contained in it, pursuant to the conditions applicable to the product.
Siemens accepts no liability for the use of the open source software over and above the
intended program sequence, or for any faults caused by modifications to the software.
For legal reasons, we are obliged to publish the original text of the license conditions and
copyright notices. Please read the information relating to this in the appendix.

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC 5
Table of contents
Preface ................................................................................................................................................... 3
1 Documentation guide .............................................................................................................................. 6
2 Product overview .................................................................................................................................... 8
2.1 Properties..................................................................................................................................8
3 Wiring ................................................................................................................................................... 11
4 Parameters/address space ................................................................................................................... 16
4.1 Measuring types and ranges ..................................................................................................16
4.2 Parameters .............................................................................................................................17
4.3 Declaration of parameters ......................................................................................................18
4.4 Address space ........................................................................................................................20
5 Interrupts/diagnostics alarms................................................................................................................. 26
5.1 Status and error displays ........................................................................................................26
5.2 Interrupts.................................................................................................................................29
5.3 Diagnostics alarms..................................................................................................................31
6 Technical specifications ........................................................................................................................ 32
A Dimensional drawing............................................................................................................................. 36
B Parameter data records......................................................................................................................... 38
B.1 Parameter assignment and structure of the parameter data records.....................................38
C Representation of analog values ........................................................................................................... 44
C.1 Representation of input ranges...............................................................................................45
C.2 Representation of analog values in voltage measuring ranges..............................................46
C.3 Representation of analog values in the current measuring ranges ........................................47
C.4 Measured values for wire break diagnostic ............................................................................48
D Open Source Software.......................................................................................................................... 49

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6Manual, 07/2014, A5E03484886-AC
Documentation guide
1
The documentation for the SIMATIC S7-1500 automation system and the SIMATIC
ET 200MP distributed I/O system is arranged into three areas.
This arrangement enables you to access the specific content you require.
Basic information
System Manual and Getting Started describe in detail the configuration, installation, wiring
and commissioning of the SIMATIC S7-1500 and ET 200MP systems. The STEP 7 online
help supports you in the configuration and programming.
Device information
Manuals contain a compact description of the module-specific information, such as
properties, terminal diagrams, characteristics, technical specifications.
General information
The function manuals contain detailed descriptions on general topics regarding the SIMATIC
S7-1500 and ET 200MP systems, e.g. diagnostics, communication, Motion Control, Web
server.
You can download the documentation free of charge from the Internet
(http://www.automation.siemens.com/mcms/industrial-automation-systems-
simatic/en/manual-overview/tech-doc-controllers/Pages/Default.aspx).
Changes and supplements to the manuals are documented in a Product Information.

Documentation guide
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC 7
Manual Collection S7-1500 / ET 200MP
The Manual Collection contains the complete documentation on the SIMATIC S7-1500
automation system and the ET 200MP distributed I/O system gathered together in one file.
You can find the Manual Collection on the Internet
(http://support.automation.siemens.com/WW/view/en/86140384).
My Documentation Manager
The My Documentation Manager is used to combine entire manuals or only parts of these to
your own manual.
You can export the manual as PDF file or in a format that can be edited later.
You can find the My Documentation Manager on the Internet
(http://support.automation.siemens.com/WW/view/en/38715968).
Applications & Tools
Applications & Tools supports you with various tools and examples for solving your
automation tasks. Solutions are shown in interplay with multiple components in the system -
separated from the focus in individual products.
You can find Applications & Tools on the Internet
(http://support.automation.siemens.com/WW/view/en/20208582).
CAx Download Manager
The CAx Download Manager is used to access the current product data for your CAx or CAe
systems.
You configure your own download package with a few clicks.
In doing so you can select:
●Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN
macro files
●Manuals, characteristics, operating manuals, certificates
●Product master data
You can find the CAx Download Manager on the Internet
(http://support.automation.siemens.com/WW/view/en/42455541).

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
8Manual, 07/2014, A5E03484886-AC
Product overview
2
2.1
Properties
Article number
6ES7531-7NF10-0AB0
View of the module
Figure 2-1 View of the AI 8xU/I HS module

Product overview
2.1 Properties
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC 9
Properties
The module has the following technical properties:
●8 analog inputs
●Voltage or current measuring type can be set per channel
●Resolution 16 bits including sign
●Configurable diagnostics (per channel)
●Hardware interrupt on limit violation can be set per channel (two low and two high limits
per channel)
●High-speed update of measured values
The module supports the following functions:
Table 2- 1 Version dependencies of the module functions
Function
Firmware version
of the module
Configuration software
STEP 7
(TIA Portal)
GSD file in STEP 7
(TIA Portal) V12 or higher, or
STEP 7 V5.5 SP3 or higher
Firmware update
V1.0.0 or higher
V12 or higher
X
Identification data I&M0 to I&M3
V1.0.0 or higher
V12 or higher
X
Parameter assignment in RUN
V1.0.0 or higher
V12 or higher
X
Isochronous mode
V1.0.0 or higher
V12 or higher
---
Calibration in runtime
V1.0.0 or higher
V12 or higher
X
Module-internal Shared Input (MSI) V2.0.0 or higher V13 Update 3 or
higher
(PROFINET IO
only)
X
(PROFINET IO only)
Configurable submodules / submodules for
Shared Device
V2.0.0 or higher V13 Update 3 or
higher
(PROFINET IO
only)
X
(PROFINET IO only)
Configurable after interface module
IM 155-5 DP ST
V2.0.0 or higher V13 or higher X
You can configure the module with STEP 7 (TIA Portal) and with a GSD file.

Product overview
2.1 Properties
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
10 Manual, 07/2014, A5E03484886-AC
Accessories
The following accessories are supplied with the module and can also be ordered separately
as spare parts:
●Shield bracket
●Shield terminal
●Power supply element
●Labeling strips
●U connector
●Universal front door
Other components
The following component must be ordered separately:
Front connectors, including potential jumpers and cable ties
You can find more information on accessories in the S7-1500 Automation System system
manual (http://support.automation.siemens.com/WW/view/en/59191792) and the ET 200MP
Distributed I/O System system manual
(http://support.automation.siemens.com/WW/view/en/59193214).

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
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Wiring
3
The section below includes the block diagram of the module and various wiring options.
For more information on front connector wiring and creating cable shields, for example, refer
to the "Wiring" section in the S7-1500 Automation System
(http://support.automation.siemens.com/WW/view/en/59191792) and ET 200MP Distributed
I/O System (http://support.automation.siemens.com/WW/view/en/59193214) system
manuals.
Note
You may use and combine the different wiring options for all channels.
Note
Do not insert the potential jumpers included with the front connector!
Abbreviations used
Meaning of the abbreviations used in the following figures:
Un+/Un-
Voltage input channel n (voltage only)
I
n+/In-
Current input channel n (current only)
U
Vn
Supply voltage at channel n for 2-wire transmitters (2WT)
L+
Supply voltage connection
M
Ground connection
MANA
Reference potential of the analog circuit
CHx
Channel or display of the channel status
PWR
Display for the supply voltage

Wiring
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
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Pin assignment for the power supply element
The power supply element is plugged onto the front connector for powering the analog
module. Wire the supply voltage to terminals 41 (L+) and 44 (M). Use terminals 42 (L+) and
43 (M) to loop the potential to the next module.
Figure 3-1 Power supply element wiring

Wiring
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
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Block diagram and pin assignment for voltage measurement
The example in the figure below shows the pin assignment for a voltage measurement.
①
Analog-to-Digital Converter (ADC)
②
Backplane bus interface
③
Supply voltage via power supply element
④
Equipotential bonding cable (optional)
Figure 3-2 Block diagram and pin assignment for voltage measurement

Wiring
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
14 Manual, 07/2014, A5E03484886-AC
Block diagram and pin assignment for 4-wire transmitter for current measurement
The example in the following figure shows the pin assignment for current measurement with
4-wire transmitters.
①
Wiring 4-wire transmitter
②
Analog-to-Digital Converter (ADC)
③
Backplane bus interface
④
Supply voltage via power supply element
⑤
Equipotential bonding cable (optional)
Figure 3-3 Block diagram and pin assignment for 4-wire transmitter for current measurement

Wiring
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
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Block diagram and pin assignment for 2-wire transmitter for current measurement
The example in the following figure shows the pin assignment for current measurement with
2-wire transmitters.
①
Wiring 2-wire transmitter
②
Analog-to-Digital Converter (ADC)
③
Backplane bus interface
④
Supply voltage via power supply element
⑤
Equipotential bonding cable (optional)
Figure 3-4 Block diagram and pin assignment for 2-wire transmitter for current measurement

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Parameters/address space
4
4.1
Measuring types and ranges
Introduction
The module is set to voltage measuring type with measuring range ±10 V by default. You
need to reassign the module parameters with STEP 7 if you want to use a different
measuring type or range.
The following table shows the measuring types and the respective measuring range.
Measuring type
Measuring range
Voltage 1 V to 5 V
±5 V
±10 V
Current 2WMT
(2-wire transmitter)
4 mA to 20 mA
Current 4WMT
(4-wire transmitter)
4 mA to 20 mA
0 mA to 20 mA
±20 mA
Deactivated
-
The tables of the input ranges, overflow, undershoot range, etc. are available in appendix
Representation of analog values (Page 44).

Parameters/address space
4.2 Parameters
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
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4.2
Parameters
Parameters of the AI 8xU/I HS
When you assign the module parameters in STEP 7, you use various parameters to specify
the module properties. The following table lists the configurable parameters. The effective
range of the configurable parameters depends on the type of configuration. The following
configurations are possible:
●Central operation with a S7-1500 CPU
●Distributed operation on PROFINET IO in an ET 200MP system
●Distributed operation on PROFIBUS DP in an ET 200MP system
When assigning parameters in the user program, use the WRREC instruction to transfer the
parameters to the module by means of data records; refer to the section Parameter
assignment and structure of the parameter data records (Page 38).
The following parameter settings are possible:
Table 4- 1 Configurable parameters and their defaults
Parameters
Range of values
Default
setting
Parameter as-
signment in RUN
Scope with configuration software, e.g.,
STEP 7 (TIA Portal)
GSD file
PROFINET IO
GSD file
PROFIBUS DP
Diagnostics
•Missing supply volt-
age L+
Yes/No No Yes Channel 1) Module 3)
•Overflow Yes/No No Yes Channel Module 3)
•Underflow Yes/No No Yes Channel Module 3)
•Wire break Yes/No
(Voltage: 1 V to
5 V
Current: 4 mA to
20 mA)
No Yes Channel Module 3)
•Current limit for wire
break diagnostics 2)
1.185 mA or
3.6 mA
1.185 mA Yes Channel --- 4)
Measuring
•Measuring type See chapter
Measuring types
and ranges
(Page 16)
Voltage Yes Channel Channel
•Measuring range ±10 V Yes Channel Channel
•Smoothing None/low/medium
/high
None Yes Channel Channel
Hardware interrupt
•Hardware interrupt
high limit 1
Yes/No No Yes Channel --- 4)

Parameters/address space
4.3 Declaration of parameters
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
18 Manual, 07/2014, A5E03484886-AC
Parameters
Range of values
Default
setting
Parameter as-
signment in RUN
Scope with configuration software, e.g.,
STEP 7 (TIA Portal)
GSD file
PROFINET IO
GSD file
PROFIBUS DP
•Hardware interrupt
low limit 1
Yes/No No Yes Channel --- 4)
•Hardware interrupt
high limit 2
Yes/No No Yes Channel --- 4)
•Hardware interrupt
low limit 2
Yes/No No Yes Channel --- 4)
1)
If you enable diagnostics for multiple channels, you will receive an alarm surge on failure of the supply voltage because
each enabled channel will detect this fault.
You can prevent this message burst by assigning the diagnostics function to one channel only.
2)
When "Wire break" diagnostics is disabled, the current limit of 1.185 mA is applied to the value status. For measured
values below 1.185 mA, the value status is always: 0 = fault.
3)
You can set the effective range of the diagnostics for each channel in the user program with data records 0 to 7.
4)
You can set the current limit for wire break diagnostics, the "Hardware interrupt" parameter and the hardware interrupt
limits in the user program with data records 0 to 7.
4.3
Declaration of parameters
Missing supply voltage L+
Enabling of the diagnostics, with missing or too little supply voltage L+.
Overflow
Enabling of the diagnostics if the measured value violates the high limit.
Underflow
Enabling of the diagnostics if the measured value violates the low limit.
Wire break
Enabling of the diagnostics if the module has no current flow or the current is too weak for
the measurement at the corresponding configured input or the applied voltage is too low.
Current limit for wire break diagnostics
Threshold for reporting wire breaks. The value can be set to 1.185 mA or 3.6 mA, depending
on the sensor used.

Parameters/address space
4.3 Declaration of parameters
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC 19
Smoothing
The individual measured values are smoothed using filtering. The smoothing can be set in 4
levels.
Smoothing time = number of module cycles (k) x cycle time of the module.
The following figure shows after how many module cycles the smoothed analog value is
almost 100%, depending on the set smoothing. Is valid for each signal change at the analog
input.
①
None (k = 1)
②
Weak (k = 4)
③
Medium (k = 16)
④
Strong (k = 32)
Figure 4-1 Smoothing with AI 8xU/I HS
Hardware interrupt 1 or 2
Enable a hardware interrupt at violation of high limit 1 or 2 or low limit 1 or 2.
Low limit 1 or 2
Specifies the low limit threshold that triggers hardware interrupt 1 or 2.
High limit 1 or 2
Specifies the high limit threshold that triggers hardware interrupt 1 or 2.