Burkert Type 8691 - Manual (Page 50)

50
DeviceNet
11.10 configuration of the process data
To transmit process data via an I/O connection, 1 static input and 1 static output assembly can be selected. These
assemblies contain selected attributes combined into one object so that process data can be transmitted collectively
via an I/O connection.
Process data can be accessed
• cyclically in the connection variants "Polled I/O" and "Bitstrobed I/O", with "Change of state", if input values
change, or
• acyclically via Explicit Messages.
The access path for acyclical access is:
class 4
instance 1
attribute 3
With the
Get_Attribute_Single service the input data can be accessed acyclically for reading.
With the Set_Attribute_Single service the output data can be accessed acyclically for writing.
•
1 data byte for inputs:
(sensors or initiators) 1 data byte for outputs:
(actuators or valves)
Bit sensor Value assignment Bit pilot valve Value assignment
Bit 0 End position
0 Bot not reached
1 Bot reached
Bit 0
Y1 0 pilot valve OFF
1 pilot valve ON
Bit 1 End position
0 Top not reached
1 Top reached
Bit 1... not used 0 always
Bit 2... not used 0 always
Bit 7
Bit 7
Table 17: Data byte for inputs Table 18: Data byte for outputs
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Type 8691