Burkert Type 8640 - Manual (Page 27)

27
Configurationandparameter
settingsforPROFIBUSDP
9.2.2. Configuration of the valve terminal without extension
terminals
The settings of the desired configuration, i.e. setting of various identifiers, is generally done with the help of the GSD
file. Up to 7 identifiers (slots) can be assigned.
When the configuration is written, the number of input and output bytes is set in the process image and checked
against permitted limits. By using different identifiers the user can assign the input and output bytes in the
process image at will.
A valve terminal has a maximum of 32 inputs and a maximum of 24 outputs. This corresponds to a maximum of 4
input bytes and a maximum of 3 output bytes. For this reason never more than the above specified number of input /
output bytes may be configured in the process image of a valve terminal- However, taking the limits specified above
into account (32 inputs, 24 outputs; 4 input bytes, 3 output bytes) it is possible to configure both less than, but also
more than the number of input / output bytes that are actually physically present on the valve terminal.
Example:
Physically present Configuration Consequence
16 valves
1 bytes Only valves 1 to 8 can be addressed
2 bytes Valves 1 to 16 can be addressed
3 bytes Valves 1 to 16 can be addressed,
1 byte remains unusable in process image
4 bytes Configuration errors
Manual configuration
If no GSD file is available the configuration must be performed manually. The following specifications apply. One
configuration telegram can contain one or several identifications, whereby the user can make the necessary allo-
cations at will. the identifications have the following structure:
Bit 7 Bit 6 Bit 5 - 4 Bit 3 - 0
Consistency
0 = byte/word
1 = total length bytes/words
0 = bytes
1 = words (2 bytes) Input/Output
00 = spec. identifier format
01 = input
10 = output
11 = input/output Data length (number)
0000 = 1 byte/word
...
0010 = 3 bytes/words
...
1111 = 16 bytes/words
Hex Decimal Description
10 016 1 byte input; consistency via byte
11 017 2 bytes input; consistency via byte
12 018 3 bytes input; consistency via byte
13 019 4 bytes input; consistency via byte
20 032 1 byte output; consistency via byte
21 033 2 bytes output; consistency via byte
22 034 3 bytes output; consistency via byte
00 000 Placeholder (empty position)
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Type 8640