46/176 Accessing data on the ID 40/MDT
Bosch Rexroth AG
, MIT: ID 40, 3 842 530 344/2014-05
6.8 Auto disconnect function
Auto disconnect
allows data to be exchanged with an MDT without stopping
the workpiece pallet in front of the SLK, just like with auto reconnect. However,
with auto disconnect, the SLK switches to the link state
DISCONNECTED
once
PRECONNECTED
is completed. Since the HF field turns off in
DISCONNECTED
, the
link state has to go back to
CONNECTING
in order to communicate with a new MDT.
A typical application for this is described in Chapter 7.9.3 “'Workstation'
application”.
As with auto reconnect, the data read in prefetch is transmitted to the application
through an event-oriented data exchange (see Chapter 6.2 “Event-oriented data
transmission”).
Automatically terminating communication with the MDT is turned on and off through
auto mode (see Chapter 5.3.3 “Auto mode”).
It is not possible to access the MDT with the command-oriented data exchange
when auto disconnect is active, since the link state
CONNECTED
is bypassed.
Fig. 21:
Phase 2
HF field on
Phase 1
HF field off
Phase 3
Data
transmission
MDT registers with
the SLK
System Start
Not done
Link state
PRECONNECTED
Link state
DISCONNECTED
Done
Not done
Link
request
CONNECT
Done
Display:
Display:
Display:
Link states for auto disconnect
PROOF COPy 1 | 20.05.2014 | FOR INTERNAL USE ONLy
