IFM DSU100 User manual

Operating instructions
IO-Link data memory
DSU100
11405785 / 0011 / 2021
GB

DSU100 IO-Link data memory
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
1.2 Legal and copyright information ............................................ 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
4 Installation.................................................................. 6
4.1 Mechanical design ...................................................... 6
4.2 Installation on tanks with mounting adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3 Installation without mounting adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical connection.......................................................... 7
6 Operating and display elements................................................. 8
7 Function ................................................................... 9
7.1 IO-Link ............................................................... 9
7.1.1 General information.................................................. 9
7.1.2 Device-specific information............................................ 9
7.1.3 Device-specific parameters............................................ 9
7.1.3.1 Parameter "Auto-Read/Write Address" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.1.3.2 Parameter "Auto-Read/WriteData Length" . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 Operation .................................................................. 11
8.1 Status bits............................................................. 11
8.2 Error values in the process input............................................ 11
8.3 "Read UID” operating mode ............................................... 12
8.4 "Auto-read data” operating mode ........................................... 12
8.5 "Auto-write data” operating mode........................................... 13
8.6 "Read data" operating mode............................................... 14
8.6.1 “Successfully reading” example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.6.2 “Reading not executed” example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.7 "Write data" operating mode............................................... 17
8.7.1 “Successfully writing” example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.7.2 “Writing not executed” example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.8 “Delete data” operating mode.............................................. 19
9 Maintenance, repair and disposal................................................ 21
10 Approvals/standards.......................................................... 22
Glossary................................................................... 24

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1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Requirement
Instructions
Reaction, result
[...] Designation of keys, buttons or indications
Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note
1.2 Legal and copyright information
© All rights reserved by ifm electronic gmbh. No part of these instructions may be reproduced and
used without the consent of ifm electronic gmbh.
All product names, pictures, companies or other brands used on our pages are the property of the
respective rights owners.

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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system architect undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.

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3 Intended use
The IO-Link storage device saves data in non-volatile memory in industrial environments. Data is
exchanged and device parameters are set via the IO-Link interface.
The device is typically used for identifying interchangeable tools or plant components.

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4 Installation
Information about available accessories at www.ifm.com
4.1 Mechanical design
Fig.1: Device
4.2 Installation on tanks with mounting adapter
1
2
3
4
Fig.2: Installing the device with mounting adapter
The mounting adapter is available as an accessory (article number E12153).
Installing the device with the mounting adapter:
uInsert the top of the device (1) into the mounting adapter.
uPress the bottom of the device (2) into the mounting adapter.
wThe device can be inserted into the mounting adapter from the top or the bottom.
uFasten the device on the mounting adapter with the screws supplied (3).
uInstall the mounting adapter on the tank with the screws supplied (4).
4.3 Installation without mounting adapter
Fig.3: Installing the device without mounting adapter
Installing the device without mounting adapter:
uInstall the device at the mounting location with suitable screws or glue.

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5 Electrical connection
wThe device must be connected by a qualified electrician.
wDevice of protection class III (PC III).
wThe electrical supply must only be made via PELV/SELV circuits.
uDisconnect power before connecting the device.
Connecting the device:
uConnect the device to the IO-Link master using the M12 connector.
wVoltage is supplied via the IO-Link master.
Information about available accessories at www.ifm.com

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6 Operating and display elements
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Fig.4: Light indicators
1 multicolour LED
State Green LED Yellow LED
Ready for operation Green LED is permanently on
Successful reading/writing from/to IO-
Link memory
Yellow LED flashes briefly 1x
Error when reading/writing from/to IO-
Link memory
Yellow LED flashes quickly repeatedly
Flashing function Green LED flashes 2x per second Yellow LED flashes 2x per second
wThe device can be easily located in plants with its flashing function.

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7 Function
7.1 IO-Link
7.1.1 General information
This device has an IO-Link interface which enables direct access to process and diagnostic data. It is
also possible to set the parameters of the device while it is in operation. Operation of the device via
the IO-Link interface requires an IO-Link capable module (IO-Link master).
7.1.2 Device-specific information
With a PC, IO-Link software and an IO-Link adapter cable communication is possible when the system
is not in operation.
Necessary information about the IODD, process data structure, diagnostic information,
parameter addresses and the required hardware and software can be found at www.ifm.com.
7.1.3 Device-specific parameters
The parameters of the device are set using an IO-Link parameter setting program (for example ifm
moneo).
wMore information about the IODD at www.ifm.com.
7.1.3.1 Parameter "Auto-Read/Write Address"
(Index 1903, subindex 0)
In the operating modes "READ DATA AUTO" / "WRITE DATA AUTO", the device automatically reads /
writes a specified number of data bytes.
The parameter defines the address in the memory area which is accessed during the read/write
operation. The address is indicated in bytes from the start of the memory area.
The data is processed as a data word (2 bytes).
uUse data word as format for the address.
uUse only even addresses.
The addressed memory area for the read/write operation cannot be outside the memory area of
the device:
uAddress for auto-read/auto-write + data length for auto-read/auto-write ≤
number of available bytes on the device
7.1.3.2 Parameter "Auto-Read/WriteData Length"
(Index 1904, subindex 0)
In the operating mode "READ DATA AUTO" / "WRITE DATA AUTO", the device automatically reads /
writes a specified number of data bytes.
The parameter defines the length of the memory area which is read / written from the device in bytes.
The data is processed as a data word (2 bytes).
uSpecify the data length as a multiple of 2 bytes.

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The addressed memory area for the read/write operation cannot be outside the memory area of
the device:
uAddress for auto-read/auto-write + data length for auto-read/auto-write ≤
number of available bytes on the device
The minimum length for auto-read/auto-write is 2 bytes and the maximum length is 28 bytes.

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8 Operation
The device supports different operating modes. An operating mode is set with the command value in
the process data output image.
Command value Operating mode
0x00 Read UID
0x01 Auto-read data
0x02 Auto-write data
0x03 Read data
0x04 Write data
0x05 Delete data
All operating modes use the same status bits and error values in the process images.
8.1 Status bits
Process input
Bit 7 6 5 4 3 2 1 0
Name Cmd End Cmd Start
Acknowl-
edge
Process output
Bit 7 6 5 4 3 2 1 0
Name Cmd Start
Status bit Value Description
Cmd End 0 Read/write operation not yet started or
active
1 Read/write operation terminated
Cmd Start Acknowledge 0 Start of a read/write operation not ac-
knowledged
1 Start of a read/write operation acknowl-
edged
Cmd Start 0 Reset trigger for read/write operation
1 Set trigger for read/write operation
wThe status bits “Cmd Start”, “Cmd Start Acknowledge” and “Cmd End” are not used in the
"Read UID" operating mode.
8.2 Error values in the process input
Error value Name Description
0x00 NOERROR No error, read/write operation successful
0x01 UNKNOWN_COMMAND Unknown command value
0x22 COMMAND SYNTAX Command value is wrong, e.g. wrong
address or length indication.

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8.3 "Read UID” operating mode
In the „Read UID“ operating mode, the UID of the device is read and provided by the latter at the
process data input. The UID cannot be changed and deleted. The UID is individually assigned to each
device at the factory.
The "Read UID" operating mode is the default operating mode after the device is started.
Byte Process data output Process data input
0 Command value = 0x00 Command value = 0x00
1 Status Status
2 ignored UID 0
3 ignored UID 1
4 ignored UID 2
5 ignored UID 3
6 ignored UID 4
7 ignored UID 5
8 ignored UID 6
9 ignored UID 7
10 ignored 0x00
11 ignored 0x00
12 ignored 0x00
13 ignored 0x00
14 ignored 0x00
15 ignored 0x00
16 ignored 0x00
17 ignored 0x00
18 ignored 0x00
19 ignored 0x00
20 ignored 0x00
21 ignored 0x00
22 ignored 0x00
23 ignored 0x00
24 ignored 0x00
25 ignored 0x00
26 ignored 0x00
27 ignored 0x00
28 ignored 0x00
29 ignored 0x00
30 ignored 0x00
31 ignored Error value
8.4 "Auto-read data” operating mode
In the "Auto-read data" operating mode the data 0 to 27 represent the data in the memory area of the
device. The memory area is set by the parameters "Auto-Read/Write Address" and "Auto-Read/Write
Data Length".
For memory areas with a data length of < 28 bytes the data remaining in the process image is filled
with the value 0x00.

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The data in the process image is updated as soon as the memory contents change. The data in the
process image is valid as soon as the status bit "Cmd End" is set.
Byte Process data output Process data input
0 command value = 0x01 command value = 0x01
1 status status
2 ignored data 0
3 ignored data 1
4 ignored data 2
5 ignored data 3
6 ignored data 4
7 ignored data 5
8 ignored data 6
9 ignored data 7
10 ignored data 8
11 ignored data 9
12 ignored data 10
13 ignored data 11
14 ignored data 12
15 ignored data 13
16 ignored data 14
17 ignored data 15
18 ignored data 16
19 ignored data 17
20 ignored data 18
21 ignored data 19
22 ignored data 20
23 ignored data 21
24 ignored data 22
25 ignored data 23
26 ignored data 24
27 ignored data 25
28 ignored data 26
29 ignored data 27
30 ignored 0x00
31 ignored error value
8.5 "Auto-write data” operating mode
In the "Auto-write data" operating mode the data to be written is defined by the process data output
image. The data is set by the parameters "Auto-Read/Write Address" and "Auto-Read/Write Data
Length".
Max. 28 bytes can be defined in the process data output image (data 0 to 27). If a shorter length is
defined in the parameter "Auto-Read/Write Data Length", the other data bytes are ignored and not
written to the internal memory.
If writing was successful, the written data is copied to the process data input image and the status bit
"Cmd End" is set.

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If writing was unsuccessful, an error value is shown in the process image.
Byte Process data output Process data input
0 command value = 0x02 command value = 0x02
1 status status
2 data 0 data 0
3 data 1 data 1
4 data 2 data 2
5 data 3 data 3
6 data 4 data 4
7 data 5 data 5
8 data 6 data 6
9 data 7 data 7
10 data 8 data 8
11 data 9 data 9
12 data 10 data 10
13 data 11 data 11
14 data 12 data 12
15 data 13 data 13
16 data 14 data 14
17 data 15 data 15
18 data 16 data 16
19 data 17 data 17
20 data 18 data 18
21 data 19 data 19
22 data 20 data 20
23 data 21 data 21
24 data 22 data 22
25 data 23 data 23
26 data 24 data 24
27 data 25 data 25
28 data 26 data 26
29 data 27 data 27
30 ignored 0x00
31 ignored error value
8.6 "Read data" operating mode
In the "Read data" operating mode more than 28 bytes can be read with a read operation. The data is
sequentially transferred from the device to the controller.
Transfer data from the device to the controller:
uThe controller sets the command value "0x03", the address (32bits) and the data length (32bits) in
the process data output image.
uThe controller starts the read operation with the status bit "Cmd Start".
uThe device acknowledges the start of the read operation by setting the status bit "Cmd Start
Acknowledge" in the process data input image.

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uThe device transfers the data to the process data output image (data 0 to 27) and increases the
block counter by 1.
uThe controller acknowledges receipt of the data by increasing the block counter in the process data
output image by 1.
uThe previous two steps are repeated until all data has been transferred.
uThe device sets the status bit "Cmd End" with the last transfer. Then the read operation is
terminated.
wIf reading was unsuccessful, the device sets the error value and the status bit "Cmd End" in
the process image. Data transfer is interrupted.
Byte Process data output Process data input
0 Command value = 0x03 Command value = 0x03
1 Status Status
2 ignored Data 0
3 ignored Data 1
4 Address 3 Data 2
5 Address 2 Data 3
6 Address 1 Data 4
7 Address 0 Data 5
8 Length 3 Data 6
9 Length 2 Data 7
10 Length 1 Data 8
11 Length 0 Data 9
12 ignored Data 10
13 ignored Data 11
14 ignored Data 12
15 ignored Data 13
16 ignored Data 14
17 ignored Data 15
18 ignored Data 16
19 ignored Data 17
20 ignored Data 18
21 ignored Data 19
22 ignored Data 20
23 ignored Data 21
24 ignored Data 22
25 ignored Data 23
26 ignored Data 24
27 ignored Data 25
28 ignored Data 26
29 ignored Data 27
30 Block counter Block counter
31 ignored Error value
8.6.1 “Successfully reading” example
The example shows that reading of the data was successful.

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Command value Address Length Data 0to27 Block counter Status bit "Cmd Start" Command value Data 0to27 Block counter Error value Status bit "Cmd End" Status bit "Cmd Start"
Process data output image Process data input image
Preset com-
mand
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
Controller sets
command (read
35 bytes from
address 0x12)
0x03 0x12 0x23 0x00 0x00 1 0x03 UID 0x00 0x00 0 0
Device acknowl-
edges command
0x03 0x12 0x23 0x00 0x00 1 0x03 0x00 0x00 0x00 0 1
Device sets first
byte of the data
0x03 0x12 0x23 0x00 0x00 1 0x03 Data 0x01 0x00 0 1
Controller ac-
knowledges re-
ceipt of the data
0x03 0x12 0x23 0x00 0x01 1 0x03 Data 0x01 0x00 0 1
Device sets
more data and
terminates read-
ing
0x03 0x12 0x23 0x00 0x01 1 0x03 Data 0x02 0x00 1 1
Controller ac-
knowledges re-
ceipt of the data
0x03 0x12 0x23 0x00 0x02 1 0x03 Data 0x02 0x00 1 1
Controller with-
draws command
value
0x00 0x00 0x00 0x00 0x00 0 0x03 Data 0x02 0x00 1 1
The device car-
ries out the pre-
set command
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
8.6.2 “Reading not executed” example
The example shows a reading command abort.
Command value Address Length Data 0to27 Block counter Status bit "Cmd Start" Command value Data 0to27 Block counter Error value Status bit "Cmd End" Status bit "Cmd Start"
Process data output image Process data input image
Preset com-
mand
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
Controller sets
command (read
0 bytes from ad-
dress 0x12)
0x03 0x12 0x00 0x00 0x00 1 0x03 UID 0x00 0x00 0 0
Device acknowl-
edges command
0x03 0x12 0x00 0x00 0x00 1 0x03 0x00 0x00 0x00 0 1
Device sets first
byte of the data
0x03 0x12 0x00 0x00 0x00 1 0x03 Data 0x00 0x00 0 1
Controller ac-
knowledges re-
ceipt of the data
0x03 0x12 0x00 0x00 0x01 1 0x03 Data 0x01 0x00 0 1
Device sets er-
ror value (Com-
mand Syntax)
0x03 0x12 0x00 0x00 0x01 1 0x03 Data 0x01 0x22 1 1

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Command value Address Length Data 0to27 Block counter Status bit "Cmd Start" Command value Data 0to27 Block counter Error value Status bit "Cmd End" Status bit "Cmd Start"
Controller with-
draws command
value
0x00 0x00 0x00 0x00 0x00 0 0x03 0x00 0x01 0x22 1 1
The device car-
ries out the pre-
set command
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
8.7 "Write data" operating mode
In the "Write data" operating mode more than 28 bytes can be written with one write operation. The
data is sequentially transferred from the controller to the device.
Transferring data from the controller to the device:
uThe controller sets the command value "0x04", the address (32bits) and the data length (32bits) in
the process data output image.
uThe controller starts the write operation with the status bit "Cmd Start".
uThe device acknowledges the start of the write operation by setting the status bit "Cmd Start
Acknowledge" in the process data input image.
uThe controller fills the data in the process data output image (data 0 to 27) and increases the block
counter by 1.
uThe device acknowledges receipt of the data by increasing the block counter in the process data
output image by 1.
uThe two previous steps are repeated until all data has been transferred.
uThe device sets the status bit "Cmd End" with the last transfer to the internal memory. Then the
write operation is terminated.
wIf writing was unsuccessful, the device sets the error value and the status bit "Cmd End" in
the process image. Data transfer is interrupted.
Byte Process data output when
starting the write operation
Process data output during
data transfer Process data input
0 command value=0x04 command value=0x04 command value=0x04
1 status status status
2 ignored data 0 0x00
3 ignored data 1 0x00
4 address 3 data 2 0x00
5 address 2 data 3 0x00
6 address 1 data 4 0x00
7 address 0 data 5 0x00
8 length 3 data 6 0x00
9 length 2 data 7 0x00
10 length 1 data 8 0x00
11 length 0 data 9 0x00
12 ignored data 10 0x00
13 ignored data 11 0x00
14 ignored data 12 0x00
15 ignored data 13 0x00

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Byte Process data output when
starting the write operation
Process data output during
data transfer Process data input
16 ignored data 14 0x00
17 ignored data 15 0x00
18 ignored data 16 0x00
19 ignored data 17 0x00
20 ignored data 18 0x00
21 ignored data 19 0x00
22 ignored data 20 0x00
23 ignored data 21 0x00
24 ignored data 22 0x00
25 ignored data 23 0x00
26 ignored data 24 0x00
27 ignored data 25 0x00
28 ignored data 26 0x00
29 ignored data 27 0x00
30 block counter block counter block counter
31 ignored ignored error value
8.7.1 “Successfully writing” example
The example shows successful writing of data.
Command value Address Length Data 0to27 Block counter Status bit "Cmd Start" Command value Data 0to27 Block counter Error value Status bit "Cmd End" Status bit "Cmd Start"
Process data output image Process data input image
Preset com-
mand
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
Controller sets
command (write
40 bytes to ad-
dress 0x10)
0x04 0x10 0x28 0x00 0x00 1 0x04 UID 0x00 0x00 0 0
Device acknowl-
edges command
0x04 0x10 0x28 0x00 0x00 1 0x04 0x00 0x00 0x00 0 1
Controller trans-
fers the first da-
ta
0x04 Data 0x01 1 0x04 0x00 0x00 0x00 0 1
Device acknowl-
edges data
0x04 Data 0x01 1 0x04 0x00 0x01 0x00 0 1
Controller trans-
fers more data
0x04 Data 0x02 1 0x04 0x00 0x01 0x00 0 1
Device acknowl-
edges data and
terminates writ-
ing
0x04 Data 0x02 1 0x04 0x00 0x02 0x00 1 1
Controller with-
draws command
value
0x00 0x00 0x00 0x00 0x00 0 0x04 0x00 0x02 0x00 1 1
The device car-
ries out the pre-
set command
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0

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8.7.2 “Writing not executed” example
The example shows a write command abort.
Command value Address Length Data 0to27 Block counter Status bit "Cmd Start" Command value Data 0to27 Block counter Error value Status bit "Cmd End" Status bit "Cmd Start"
Process data output image Process data input image
Preset com-
mand
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
Controller sets
command (write
40 bytes to ad-
dress 0x10)
0x04 0x10 0x00 0x00 0x00 1 0x04 UID 0x00 0x00 0 0
Device acknowl-
edges command
0x04 0x10 0x00 0x00 0x00 1 0x04 0x00 0x00 0x00 0 1
Controller trans-
fers the first da-
ta
0x04 Data 0x01 1 0x04 0x00 0x00 0x00 0 1
Device acknowl-
edges data
0x04 Data 0x01 1 0x04 0x00 0x01 0x00 0 1
Controller trans-
fers more data
0x04 Data 0x02 1 0x04 0x00 0x01 0x00 0 1
Device sets er-
ror value (Com-
mand Syntax)
0x04 Data 0x02 1 0x04 0x00 0x01 0x22 1 1
Controller with-
draws command
value
0x00 0x00 0x00 0x00 0x00 0 0x04 0x00 0x01 0x22 1 1
The device car-
ries out the pre-
set command
0x00 0x00 0x00 0x00 0x00 0 0x00 UID 0x00 0x00 0 0
8.8 “Delete data” operating mode
With the “Delete data” operating mode, the complete data contents of the memory are permanently
deleted. Deleting starts with setting the command value to “0x05” and changing the status bit "Cmd
Start from “0” to “1”. Deleting is finished when the status bit "Cmd End" is set.
wThe “Delete data” operating mode cannot be aborted. The stored data are reset to the value
“0x00”.
Byte Process data output Process data input
0 Command value = 0x05 Command value = 0x05
1 Status Status
2 ignored 0
3 ignored 0
4 ignored 0
5 ignored 0
6 ignored 0
7 ignored 0
8 ignored 0
9 ignored 0
10 ignored 0
11 ignored 0

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Byte Process data output Process data input
12 ignored 0
13 ignored 0
14 ignored 0
15 ignored 0
16 ignored 0
17 ignored 0
18 ignored 0
19 ignored 0
20 ignored 0
21 ignored 0
22 ignored 0
23 ignored 0
24 ignored 0
25 ignored 0
26 ignored 0
27 ignored 0
28 ignored 0
29 ignored 0
30 ignored 0
31 ignored Error value