Auto Disconnect Function - Bosch Rexroth ID 40 Manual

46/176 Accessing data on the ID 40/MDT
Bosch Rexroth AG, MIT: ID 40, 3 842 530 344/2014-05
PROOF COPy 1 | 20.05.2014 | FOR INTERNAL USE ONLy

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.
Phase 1
HF field off
Phase 2
HF field on
Phase 3
Data
transmission
Fig. 21: Link states for auto disconnect
System Start
Link state
DISCONNECTED
Link
request
Not done
CONNECT
Done
MDT registers with
Not done
the SLK
Done
Link state
PRECONNECTED
Display:
Display:
Display: