Burkert Type SE56 - Manual (Page 28)

TECHNICAL MANUAL Rev. Pagine 28/52
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03 PROFIBUS DP MODULE- DATA LINK
DESCRIPTION
Document Data Date Date
File name ProfibusDP_emanual_Burkert_04.doc 19/03/08 19/03/08 19/03/08
28
byte 0: (8 bits integer) INDEX Input: the value set the type of the Input data
byte 1: (8 bits integer) INDEX Output = 42(dec)
byte 2: (8 bits integer) menu Measure – cut-off es. 1(dec) / 10 = 0.1%, 255(dec) / 10 Æ 25.5%
byte 3: (8 bits integer) menu Batch - N.samples
byte 4: (8 bits integer) menu Batch – Diff.thr
bytes 6-7: (2 bytes 16 bit unsigned integer, MSB first) menu Batch – V.com (value expressed in the same
units and with the same decimal digits of the volume counters)
bytes 8-9: (2 bytes 16 bit unsigned integer, MSB first) menu Batch – V.pre (value expressed in the same
units and with the same decimal digits of the volume counters)
es.
Insertion of the parameters value:
byte 0: 0xXX index input
byte 1: 0x2A = 42(dec) index output
byte 2: 0x01 Æ cut-off ( menu Measure ) = 0.1%
byte 3: 0x02 Æ N.samples ( menu Batch ) = 2
byte 4: 0x03 Æ Diff.thr ( menu Batch ) = 3%
byte 5: 0x00 Æ byte alignment
byte
6: 0x00
byte 7: 0x04 Æ V.com ( menu Batch ) = 00.004
byte 8: 0x00
byte 9: 0x05 Æ V.pre ( menu Batch ) = 00.005
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2.8. FIFTH CONFIGURATION: 24 BYTE INPUT/OUTPUT
With the precedent configurations, the type of data as Static Data and other parameters of the Flow meter,
the only possible way for to return the data was with Acyclic Service and Class 1 or Class 2 Master.
In the same way the insertion of data in the slave was with Acyclic Service.
If the Master don't support the Acyclic Service, with this configuration it is possible, with two indexes, read
and write Static Data and insert data to the slave as Output data.
With the Output data it is possible the insertion of the values of the two Indexes used for the selection of
the type of data returned with the Input data, for example the Static Data or others parameters, and insert
other data as the Time of the clock of the Flow meter and other parameters.
The two indexes used for the selection and the insertion of the data are:
INDEX Input
INDEX Output
The two indexes are inserted with the Output data during the cyclic data exchange in the firsts two byte of
the 24 Output data ( see the structure of the 24 bytes below in this section ).
The current value of the two index are returned with the first two byte of the 24 bytes Input data ( see the
structure of the 24 bytes below in this section ).