Divergent Timelines For WLAN Devices Versus Sensors
Use of wireless devices in the discrete industries falls into two distinct categories: increasingly WLAN-based data acquisition or HMI via mobile computers or operator terminals, and sensor/actuator type communications at the I/O level.

The WLAN-based devices, increasingly the vehicles for mobile enterprise integration, will also become the focus for wireless convergence as GSM, RFID, and location- based services are added to their existing WLAN and Bluetooth compatibility. Conversely, while the business drivers are in place at the sensor and actuator level, growth prospects will be dampened by the latency requirements of high speed discrete processes and the longer time frame anticipated for standards ratification.

The dominant market shares of AIDC suppliers are indicative of the limited penetration of wireless to date in discrete automation. The makeup of the supply base is changing, however, as automation suppliers issue their own wireless products.

Discrete manufacturers and their OEMs are increasingly aware of the potential benefits of wireless technology, including its status as “the ultimate Fieldbus”, and are closely watching developments in the process industries. They know that the prospect of a cable-free interface for use in control and data acquisition has the potential to significantly impact productivity, performance, and cost reduction.

Strategic Issues
Many discrete manufacturers have experienced unsuccessful wireless implementations that were plagued with interference or caused disruptions to existing installations. In a large number of cases this resulted in strict prohibitions regarding the introduction of new wireless installations on the factory floor. This study will help to answer questions, such as:

• What are the primary business drivers for each segment of the wireless market, including OEM machine builders?
• Which emerging standards will be fundamental to success in wireless devices?
• What are the key requirements for WLAN versus cable replacement?
• Which automation suppliers are introducing wireless?