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BFD 3SAP-19N000-U01-LA2-C_ _ _ _ _
Ultrasonic sensors
7
System Functions (continued)
PD Description
This parameter is used to specify the structure of the
currently selected process data profile for input and output
data. The individual process data variables are described.
The total list is accessible via subindex 0, a single entry is
possible using a specific subindex. Subindex 1
corresponds to the least significant (or the element most
recently transferred in the process data stream). When
reading out the entire list, this element is transferred first.
The length of the list is dependent on which process data
profile is selected. A single element has a length of 3 bytes.
Byte number
Contents
Byte 1
Data type
Byte 2
TypeLength
Byte 3
Bit offset
Tab. 7-22: Process data info and configuration – PD Description
Last Valid Process Data
This parameter indicates the most recently valid input or
output data of the device. The first transferred byte in the
process data (MSB) is transferred first. This is an exact
representation. Access occurs via subindex 0.
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Values
0: OctetStringT
1: Set of BoolT
2: UIntegerT
4: Float32T
5...255: reserved
0...255 bits
0...255 bits
7.7.3
Events
PD Update Timeout
With special process data values, the device automatically
checks whether the values are updated in the time period
specified by the device. If an update timeout is triggered as
a result, this is output via the following diagnosis
messages:
Event
Event Type
Event –
Code
Description
– Remedy
0x1851
Notification
Process Data
(6225)
Update
Timeout – for
information
purposes only
0x1852
Warning
Multiple
(6226)
Process Data
Update
Timeout – for
information
purposes only
Tab. 7-23: Process data information and configuration – Events
PD Profile Selection after Change of Variant
If the variant of the device is changed, the currently set
profile is retained.
In the case that the corresponding PD profile is not valid
for this variant, the default profile for the corresponding
variant is selected.
Event
Event Type
Event –
Code
Description
– Remedy
0x1850
Notification
Process data
(6224)
profile
selection
cannot be
used – default
value is used.
Tab. 7-24: Process data information and configuration – Events
Device
Status
0 – Device is
operating
properly.
0 – Device is
operating
properly.
Device
Status
0 – Device is
operating
properly.
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