Examples of applications
3.6 Optimization of a power screwdriver control
Industrial Ethernet
114 System Manual, 09/2019, C79000-G8976-C242-10
3.6 Optimization of a power screwdriver control
Task
Handheld compressed air screwdrivers are used in the final assembly of motor vehicles and
they can be supplied via mobile stations on overhead monorails. These units need to be
replaced by new, motor-driven screwdriver stations and the customer would like to do away
with the previously necessary sliding contacts that were always subject to wear and tear.
Solution
The new solution is based on Industrial Wireless LAN. To allow wireless data
communication, an RCoax cable
â‘ is laid along the path of the screwdriver stations. The
RCoax cable is connected to the antenna output of a SCALANCE W788-1
â‘¡ access point.
This means that there is a defined RF field available around the RCoax cable. Via the
Ethernet interface of the access point, there is a connection to the plant controller
â‘¢ and the
server of the assembly line
â‘£.
A SCALANCE W748-1
â‘¥ client module is used as the communication partner on the
screwdriver stations
⑤.
The data exchange with all components of the mobile station is handled by a SCALANCE
XP208 switch
⑦. Operation of the station takes place via a Panel PC ⑧ and the
screwdriver controller
⑨.
The new screwdriver stations are moved by a geared motor connected via the distributed I/O
â‘©.
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