Rockwell Automation Allen-Bradley 856T-B24LC User manual

Control Tower IO-Link Class B
Light and Sound Module
Controller
Catalog Number 856T-B24LC
User Manual Original Instructions

2Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Control Tower IO-Link Class B Light and Sound Module Controller User Manual
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize
themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to
be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use
or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software
described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is
prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 856T-UM001B-EN-P - April 2021 3
Table of Contents
Preface
Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Download Firmware, AOP, EDS, and Other Files . . . . . . . . . . . . . . . . . . . . 7
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 1
Product Overview Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IO-Link Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 2
IO-Link Overview What is IO-Link? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Why IO-Link?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Seamless Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Real-time Diagnostics and Trending . . . . . . . . . . . . . . . . . . . . . . . . . . 14
IO-Link Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Device Profiles and Automatic Device Configuration. . . . . . . . . . . . 14
Descriptive Tags. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
How IO-Link Works? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Transmission Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Transmission Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Response Time of the IO-Link System . . . . . . . . . . . . . . . . . . . . . . . . . 15
IO-Link Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Process Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Value Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Device Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Access IO-Link Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Cyclic Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Acyclic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
I/O System Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Assign Device Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Table of Contents
Chapter 3
Configure the 856T-B24LC IO-
Link Module
Products Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
AOP Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Create Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Add Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Add POINT I/O Ethernet Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Add IO-Link Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Register the 856T-B24LC Module IODD File . . . . . . . . . . . . . . . . . . . . . . . 24
Embedded IODD File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Download IODD File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Connect the 856T-B24LC Module to the IO-Link Master. . . . . . . . . . . . . 29
Download the Project to the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Chapter 4
IO-Link Parameters Display Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
IO-Link Tabs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Common Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Identification Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Observation Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Parameter Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Diagnosis Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Chapter 5
Power On Self Test (POST) Hardware Fault Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Non-recoverable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Critical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Severe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Device Status Indicator -Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
IO-Link Status Indicator Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Chapter 6
Class A IO-Link Master
Connection Consideration
Patchcord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Maximum Number of Light/Sound Modules in the Stack Light . . . . . . 45
Inrush Current Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 7
Message Structure and
Configuration Example
Configure a Message Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Example Format of a Read Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Read Data from the IO-Link Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Example Format of a Write Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Validation of Write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Service Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Source Length: From Data Structure Tables . . . . . . . . . . . . . . . . . . . . 52

Rockwell Automation Publication 856T-UM001B-EN-P - April 2021 5
Table of Contents
Appendix A
Specifications IO-Link Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Approximate Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Appendix B
IO-Link Operation Modes of 856T
Light and Sound Modules
856T Light and Sound Module Operation Mode . . . . . . . . . . . . . . . . . . . . 55
Appendix C
Device Parameters Identification Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Observation Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Parameter Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Diagnostics Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
IO- Link System Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Process Data Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Process Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Configuration Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Appendix D
Device Status Operational State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Short Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Appendix E
Factory Reset Reset to Factory Settings — Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Reset All Statistics —Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Appendix F
Troubleshooting Error Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Table of Contents
Notes:

Rockwell Automation Publication 856T-UM001B-EN-P - April 2021 7
Preface
This manual is a reference guide for the 856T-B24LC IO-Link module for
Control Tower™ stack lights. It describes the procedures to install, wire, and
troubleshoot this device.
Who Should Use This
Manual
Use this manual if you design, install, program, or troubleshoot systems that
use the 856T-B24LC module for stack lights.
You must have a basic understanding of electrical circuitry and familiarity
with safety-related systems. If you do not, obtain the proper training before
using this product.
Qualified personnel must conduct all inspections. A qualified person must
perform these tasks:
• Undergone the appropriate technical training
• The responsible machine operator has instructed personnel in the
operation of the machine and the current safety guidelines.
• Has read and has access to the user manual.
Abbreviations
Download Firmware, AOP,
EDS, and Other Files
Download firmware, associated files (such as AOP, EDS, and DTM), and access
product release notes from the Product Compatibility and Download Center at
rok.auto/pcdc.
Abbreviation Description
ADC Automatic Device Configuration
AOI Add-On Instruction
AOP Add-On Profile
ASN Application-Specific Name
IEC International Electrotechnical Commission
IOOD I/O Device Description
NEC National Electric Code
QD Quick disconnect
RGB Red, green, blue
SIO Standard I/O
IO-Link module
Tower light IO-Link Class B light and sound module controller856T-B24LC
IOLD
POST IO-Link module power on self test

8Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Preface
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at rok.auto/literature.
Resource Description
Bulletin 856T Control Tower Installation Instructions, publication 856T-IN013 Provides information to install and wire the 856T IO-Link module.
System Security Design Guidelines, publication SECURE-RM001 Provides guidelines for how to use Rockwell Automation products to improve the security of
your Industrial Automation system.
Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website, rok.auto/certifications. Provides declarations of conformity, certificates, and other certification details.

Rockwell Automation Publication 856T-UM001B-EN-P - April 2021 9
Chapter 1
Product Overview
The 856T-B24LC module allows the control and configuration of a standard
856T stack light via the IO-link protocol. This configuration helps your save
time and money in wiring, commissioning, and startup of the entire stack
light while providing access to valuable real-time diagnostics and prognostic
information.
Operation Modes The 856T-B24LC module is compatible with the current light and sound
modules that are offered in the standard 856T product line. The 856T-B24LC
module is capable to control up to seven modules in the stack light
arrangement. The maximum number of light and sound modules in a stack
light configuration depends on the number of circuits that are used
individually by the specific light or sound module (up to seven per 856T-B24LC
module). A summary of all 856T light and sound modules that can be controlled
with the 856T-B24LC module is shown in Table 12 on page 55.
Product Features • Mechanically compatible with all 856T base mount adapters to offer
vertical, surface, pole, and tube mounting options
• 70 mm external diameter
• Visible status indicator that shows the result of the device self test at
powerup.
• IP66/67 rated enclosure
• IO-Link 1.1 communication protocol compliant
• Class B device
IO-Link Features • Built-in counters to allow you to know the number of times a specific
module has been turned ON.
• Operation hours since inception and since powerup that can help you
correlate machine availability.
• Vibration indication to alert you about unusual mechanical behavior
when the IO-Link module detects vibration above certain threshold
values.
• Class A and Class B voltage monitoring
• Short-circuit detection to help protect the circuitry of the device and the
master from a light or sound module short circuit.
• Open load condition useful to indicate when light or sound modules in
the stack light have not been properly installed.
• Premier integration design that enables configuration via the
Rockwell Automation® IO-Link master Add-on Profile.
• Automatic Device Configuration that helps you replace the device
quicker, if necessary.

10 Rockwell Automation Publication 856T-UM001B-EN-P - April 2021
Chapter 1 Product Overview
• Embedded IODD file in the device saves configuration time because
there is no need to find this file somewhere else. This file also makes
IODD registration quicker.
• Process Data Maps allow for selection of the type of information that is
continuously sent to the PLC as a process data parameter.
• Internal temperature indication that helps to understand changes in the
temperature of the application environment.
Installation
The 856T-B24LC module is mounted without the use of a tool in any of the 856T
standard base mount adapters that are shown in Figure 2.
For a good mechanical fit, the module provides a haptic feedback (click) only
when it is fully twisted onto the base mount adapter.
The 856T-B24LC module encloses the 5-pin M12 connector on the bottom of the
device and accepts standard cordsets to connect to an IO-Link Master Class B.
Figure 1 - Mount the IO-Link Module
IMPORTANT The 856T tower light product family (including the 856T-B24LC module)
is designed for general signaling applications and should not be wired
to any safety circuit in the application.
IMPORTANT Verify that the right edge on the alignment mark (triangle shape) in the
856T-B24LC module is aligned with the arrow mark on the base mount
adapter as shown in Figure 1.
IMPORTANT Physical protection of the stack light is recommended where the
possibility of unwanted access or damage to the device exists in the
application. You should also consider the use of conduit to shield the
cable to avoid cable or wiring cuts.
IMPORTANT Since the IO-Link protocol is not encrypted or authenticated, you should
protect the cabling and the connectors in both the IO-Link master and
the 856T-B24LC module to help prevent unwanted access when a
distributed control architecture is used. When the device is installed on
top of a control panel, the panel enclosure must provide protection
against unwanted accessibility to the cabling.
3
1
2
Click
Closed
856T-ABCAP
Not Supplied