An Introduction to IO-Link

Russell SmithBalluff Limited

WHAT IS IO-LINK?

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not another bus system!

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point to point communications protocol from the fieldbus to the sensor and actuator level.

up to

20M

Pulse-width modulated 24V

Baud rates: 4.8 kBit/s (COM1), 38.4 kBit/s (COM2), 230,4 kBits/s (COM3)

Pin Signal Description1 L + 24 Volt

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3 L - 0 Volt

4 C / QIO-Link

communication+ switching signal

standard - IEC 61131-9network neutral

an open standard

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IO-Link master… acts as a gateway between the IO-Link device and the higher level communication system, such as a fieldbus (Profinet, EtherNet/IP, etc.) or a device-specific backplane bus.

IO-Link device… is the field device with communication capability: sensors, switching devices, valve terminals, RFID devices, indicator lights, etc.

3-core unshielded standard cable – up to 20M long… is the standard interface between IO-Link master and device

IODD and engineering tool… are used to configure and assign parameters to the IO-Link system and devices.

an IO-Link system generally consists of the following basic components:

IO-Link devices

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many different IO-Link devices are available.

IO-Link masters

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panel mounted unit with terminals

IP67 field I/O module

additional slice on existing PLC

WHY IO-LINK?

easier handling of measurement devices

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traditionally

better

best

lower cost – no analogue card

lower cost vs IE networked device

less wiring effort

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low cost

high density

less addresses

low cost per I/O point – 136 I/O on one IP address

extensive diagnostics

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available on sensors/devices and sensor hubs

troubleshoot problems quickly

maximise up-time

• Short circuit – LED for each I/O port• Short circuit does not impair the unit• Sensor/actuator under voltage LED for each I/O port

extensive diagnostics:

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simplify valve manifold wiring

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reduced installation time

reduced cost

• World´s first combination of IO-Link and Safety

• Communication via one Topology

• Open System on the sensor level

• Connection of the safety IO-Link device to the standard BalluffIO-Link-Master

• Parameterization via PLC

SAFETY OVER IO-LINK

14Balluff GmbH | BN

PROFISAFE IO HUB

15Balluff GmbH | BN Safety, M. Bristle

&Further features• Profisafe over IO-Link• PLe / SIL CL 3• standardized wiring concept (AIDA)• Diagnostic and Display integrated• CE, TÜV, (UL in preparation)

technical data (extract)• Cycle time: 20 ms• Temperature range: -5°C…55°C• Inputs: 2 pcs.• Safe Inputs: 12 pcs.• Outputs: 2 pcs.• Safe Outputs: 2 pcs.• Sum current (Aktors): 8 A• Sum current (Sensors): 4,8 A

PORT CONFIGURATION

16Balluff GmbH | BN Safety, M. Bristle

Cable length IO-Link:max. 20 m

(acc. IO-Link Specification)

Cable length Device:max. 30 m

(s. Specification Device)

Cable length UB:max. 30 m

extends communication

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ERP

MES

SCADA

PLC

Network

Sensors and Actuators

Enterprise Level

Control Level

Management Level

Plant Control Level

Field Level

Sensor / Actuator Level

HMIparameterisation – std pressure sensor

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HMI

HMIHMIHMIHMI

Time consuming configuration of 10 – 15 Parameter.(e.g. upper/lower Pressure point, Hysteresis, Time – or Pressure window)

Machine Tools have often more than 10 Pressure sensors

Error prone due to manual entry

Very bad when Sensor failure / Sensor exchange (especially during night shift)

parameterisation – std pressure sensor

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Manualconfiguration

parameterisation – std pressure sensor

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HMI

HMI

HMI

HMI

HMI integrated in sensor for set upmeans additional cost.

Expensive high-pressure hydraulichoses

parameterisation – std pressure sensor

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machine tool

Additional cost for protectivehousing for sensors in the machine

E.g. machine tool

parameterisation – pressure sensor with IO-Link

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PLCFunction-

blocks

Vendor_IDDevice_ID

Param1: 50barParam2: 100barParam3: 200ms

Step 1Identify device

Step 3Get Parameter Set

Step 2Check identity

Step 4Write Parameter Set

parameterisation – pressure sensor with IO-Link

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sensor installed at point of measurement

no expensive measurement cables - use std un-shielded 3-wire standard cables

no protection case

no sensors with HMI but reliable parameterisation via controller and HMI of the machine

decentralised diagnostics for sensors

parameterisation – pressure sensor with IO-Link

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parameter server

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IO-Link V1.1 master

automated tool changes

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IO-Link inductive couplers fornon-contact signal transmission

an i4.0 enabler

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ERP

MES

SCADA

PLC

Network

Sensors and Actuators

Enterprise Level

Control Level

Management Level

Plant Control Level

Field Level

Sensor / Actuator Level

unabated IO-Link success!

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HOW IO-LINK?

device configuration

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1. controller parameter storage –parameterisation from the PLC using the function block

2. IO-Link master ver 1.1 parameter server

3. PC storage with USB master

4. webserver entry with IO-Link master

5. Manual configuration

IO-Link master configuration

connect the master and install GSDML file

drag and drop the relevant file

Drag the appropriate (process data length) IOL input / output byte from the catalogue and name & address the module

IO-Link master configuration

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THANKS FOR LISTENING!