Wireless Design; Basics - Siemens SIMATIC ET 200AL System Manual

Description
2.2 Setting up PROFINET
2.2.3

Wireless design

2.2.3.1

Basics

What is Industrial Wireless LAN?
In addition to data communication in accordance with the IEEE 802.11 standard, the
SIMATIC NET Industrial Wireless LAN provides a number of enhancements which offer
significant benefits for industrial customers. IWLAN is particularly suitable for demanding
industrial applications that require reliable wireless communication. This is supported by the
following properties:
• Automatic roaming when the connection to Industrial Ethernet is interrupted (Forced
Roaming)
• Cost savings generated by using a single wireless network for reliable operation of a
process with both process-critical data (alarm message, for example) and non-critical
communication (service and diagnostics, for example)
• Cost-effective connection to devices in remote environments that are difficult to access
• Predictable data traffic (deterministic) and defined response times
• Cyclical monitoring of the wireless link (link check)
Objectives and advantages of Industrial Wireless LAN
Wireless data transmission achieves the following objectives:
• Seamless integration of PROFINET devices into the existing bus system via the wireless
interface
• Mobile use of PROFINET devices for different production-linked tasks
• Flexible configuration of the system components for fast development in accordance with
customer requirements
• Maintenance costs are minimized by savings in cables
36
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL