Fieldbus & Industrial Networking

Mobile data memory for IO-Link

April 2022 Fieldbus & Industrial Networking

The DSU external IO-Link memory from ifm electronic is a mobile all-purpose device for local data transmission. Connected to an IO-Link master, the small device makes the stored data available to all connected receivers. For example, if used as a digital-type label for an interchangeable tool, the PLC can identify it independently and reliably, extract information about operating hours, and alert the operator when maintenance is due, to prevent damage to the tool or workpiece.

During operation, data is continuously written to the historical memory, taking advantage of the device’s COM3 interface running at 230,4 Kbps and 128 KB capacity – sufficient for all relevant data and histories. The memory can also be parameterised and read via the IoT software moneo configure. In this way, recorded data on total operating hours, maintenance intervals or system-relevant maximum and minimum values such as pressure, temperature or vibration data, can be easily read. Optional write protection prevents accidental overwriting of sensitive device information.

The IODD required for configuration of the unit, detailed information about process data structure, diagnostic information, parameter addresses and necessary information about the required IO-Link hardware and software, can be found at

The device supports various operating modes, such as reading the device-specific globally unique UID, reading and writing up to 28 Bytes of data in one IO-Link cycle, and reading and writing larger amounts of data, with length restrictions usually only imposed by the PLC. Automatic access to the memory stick during operation can be defined via numerous commands that regulate and control read and write access.


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Intrinsically safe EtherCAT I/O modules
Beckhoff Automation Fieldbus & Industrial Networking
As a robust alternative to IP20 solutions with their elaborate housing protections, EPX modules with IP67 protection rating enable reliable data collection.

Pressure sensors for hygienic applications
ifm - South Africa Editor's Choice Pressure Measurement & Control
ifm’s new PI1xxx series offers measuring ranges from vacuum to 100 bar, communication via IO-Link 1.1, and resolution close to 20 000 steps.

Modbus probes gain support for parity options
RF Design Fieldbus & Industrial Networking
The marquee feature of firmware version 1.06 facilitates the use of odd, even, mark or space parity modes when communicating with bus probes.

Flexible LED strip for illumination and signalling
ifm - South Africa Operator Interfaces, Switches & Relays
Triggering is via four digital inputs that can be used to produce the colours red, yellow, green, blue, cyan and purple, as well as pure white

Pressure transmitters for mobile machines
ifm - South Africa Pressure Measurement & Control
ifm electronic’s PT/PU-type sensors offer high vibration and shock resistance, a high degree of protection, and very good EMC resistance.

Compact and powerful energy monitoring unit
Opto Africa Holdings Electrical Power & Protection Fieldbus & Industrial Networking
The RIO EMU’s slim form factor is ideal for ‘just one more thing’ retrofit jobs thanks to DIN-rail and panel-mount options.

Is your manufacturing plant ready for IoT?
Editor's Choice Fieldbus & Industrial Networking IT in Manufacturing
Pockets of IoT exist in manufacturing plants today; the challenge is to fully digitalise the entire plant.

Extend the life of your legacy devices
RJ Connect Fieldbus & Industrial Networking
If your serial-based machines or devices have been running for decades and helped your business grow, you might worry about how long you can still hold on to these assets. In this article, we highlight three major challenges you will face when enabling serial connectivity between your legacy devices and modern systems. We also provide expert tips to make your upgrade easy.

AS-i and IO-Link power distributor for hygienic areas
Fieldbus & Industrial Networking
The special housing material and high ingress protection allow operation in areas with frequent intensive cleaning processes, for example in the food industry.

Upgraded IIoT functionality for excom Ethernet I/O
Turck Banner Fieldbus & Industrial Networking
Firmware update adds functions to excom Ethernet gateways, such as webserver, HCiR and parallel access to HART devices.