Balluff BIS M-4 045 0 07-S4 Series, Operating Manual

Page: 87 / 202

www.balluff.com 19
The BIS M identification system is a contactless read and write system. The read/write device
consists of evaluation electronics with permanently connected read/write head. The system can
be used to program and to read information on a data carrier. The data and current status
messages are transmitted from the identification system to the host system via a defined proto-
col. This protocol can also be used to transmit additional commands to the device, such as
switching off the read-head antenna.
The main components of the BIS M identification system are:
– Read/write device,
– Data carrier.
Data is transmitted to the host system via an IO-Link master.
Figure 16: Schematic representation of an identification system
1
Connection to the IO-Link master
2 Read/write device
3 Data carrier 4 Read/write device
The data carrier is an autonomous unit that is supplied with power by the read/write head. The
read/write head continuously sends a carrier signal that is picked up by the data carrier from
within a certain distance. As soon as the data carrier is powered up by the carrier signal, a static
read operation takes place.
The read/write device manages the data transfer between read/write head and data carrier,
serves as a buffer storage device, and sends the data to the host controller.
The data is passed to the IO-Link master using IO-Link protocol, and the master then passes it
to the host system.
Host systems may be the following:
– A control computer (e.g. industrial PC)
– A PLC
The main areas of application are:
– In production for controlling material flow (e.g. for model-specific processes, conveying
systems that transport workpieces, acquisition of safety-relevant data)
– In warehousing for monitoring material movement
– transportation, and
– conveying technology.
4.1 Function
Principle of
Identification
Systems
4
Basic Knowledge
BIS M-4 _ _ IO-Link Device
Read/Write Device