NORD Drivesystems BU0090 User Manual
Page 28
NORDAC AS-Interface Manual
28
BU
0090
GB
In the "configuration" status the slave waits to be identified
by the master and ultimately to be activated. This is
performed by means of a command "Exchange parameters"
After this the slave reverts to normal operation and
responds to calls for data. A timeout function "watchdog"
monitors the current data communication. If this fails for a
certain time ("timeout"), then the outputs are reset and the
slave reverts to the "configuration" status.
The following tasks are performed by the slave chip (ASIC) in the processing of the interfaces below:
Operating interface for the user: Status display, addressing interface and diagnosis,
Process interface to the sensor/actuator/field device (only modules)
Interface to the AS interface network.
Device profile:
The device profiles are uniquely labelled by the combination of the I/O configuration, ID code, ID1 code and
ID2 code and therefore identify each slave.
I/O
configuration
EA3
EA2
EA1
EA0
ID Code
ID3
ID2
ID1
ID0
ID1 Code
ID3
ID2
ID1
ID0
ID2 Code
ID3
ID2
ID1
ID0
The device profiles establish the following and specify between products from different manufacturers:
the meaning of the information which is transferred with the data bits
whether parameters are used, and if yes, what meaning they have
which addressing mode is used
whether the peripheral error bit in the status register can be evaluated
whether a combined exchange of information has been implemented.
Initialisation
Configuration
Normal operation
Reset outputs
Power on
Parameter call
up received
Communication
timeout
OK