Data Transmission Between Slk And Mdt; Position Of Mdt And Slk During Data Transmission - Bosch Rexroth ID 40 Manual

20/176 Introduction
Bosch Rexroth AG, MIT: ID 40, 3 842 530 344/2014-05
PROOF COPy 1 | 20.05.2014 | FOR INTERNAL USE ONLy

2.3 Data transmission between SLK and MDT

The data transmission between the SLK and the MDT is contactless and occurs via
a high-frequency electromagnetic field (HF field). The MDT is also powered by this
electromagnetic field. To begin exchanging data, the mobile data tag is moved into
the field of the read/write head.
Fig. 5: Display indicating mobile data tag is ready for communication
The LED on the front edge of the housing lights up orange when the MDT enters the
SLK's field. Once a secure data transmission is possible between the MDT and SLK,
the color changes. When the LED shows green, the MDT is operating correctly. When
the LED shows red, an error occurred during the last data exchange
(see Chapter 4.2.3.1 "MDT status register").
When the data exchange between the SLK and the MDT ends, the LED color changes
to orange, then turns off once the MDT leaves the HF field.
2.3.1

Position of MDT and SLK during data transmission

Proper exchanging of data always depends on the alignment of the MDT and SLK to
one another, and on the read/write distance. MDT alignment consists of frontal and
lateral alignment.
Fig. 6: Alignment of ID 40/MDT for frontal reading and writing
LED