Burkert Type SE56 - Manual (Page 16)

TECHNICAL MANUAL Rev. Pagine 16/52
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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
16
byte 15 = 5 --> Flow rate in technical unit
totalizers positive or batch quantity ( batch quantity only for ML M3F )
totalizers negative or batch quantity ( data valid only for ML 210 )
For details see the section Slave Configuration.
There is a second way to set the type of the Flow rate using the Acyclic Service during data exchange (see
section Acyclic Service).
2.5. THIRD CONFIGURATION: 24 BYTE INPUT
Below there is a description of the contents of each byte:
bytes 0-3: (32 bit single precision IEEE floating point, MSB first) Flow rate in % or Flow rate in t.u. (see
section 2.6 Flow Rate Type)
bytes 4-7: (32 bit long integer, MSB first) totalizer for TOTAL volume + or batch quantity ( batch quantity
only for ML M3F )
bytes 8-11: (32 bit long integer, MSB first) totalizer for PARTIAL volume + or batch counter ( batch counter
only for ML M3F )
bytes 12-15: (32 bit long integer, MSB first) totalizer for TOTAL volume - or batch quantity ( data valid only
for ML 210 )
bytes 16-19: (32 bit long integer, MSB first) totalizer for PARTIAL volume - or batch counter ( data valid only
for ML 210 )
bytes 20-21: (16 bit unsigned integer, MSB first) process flags:
bit 0 =1 if the excitation is too fast for the sensor connected
bit 1 =1 if the maximum alarm is active
bit 2 =1 if the minimum alarm is active
bit 3 =1 if the Flow rate exceeds the scale range value (overflow)
bit 4 =1 if one or more output impulses are saturated (too many impulses to emit)
bit 5 =1 if the measurement signal is highly disturbed or if the sensor is disconnected
bit 6 =1 if the measurement tube is empty
bit 7 =1 if the circuit powering the coils is not working or the sensor is disconnected
bit 8 =1 if the second measurement scale is active
bit 9 =1 if the Flow rate is lower than the cut-off threshold
bit10=1 if the Flow rate is negative
bit11=1 if a new measurement value calculated for the display is available
bit12=1 if the counter block signal is active
bit13=1 if dosing is in progress
bit14=1 if a calibration cycle is in progress
bit15=1 if a Flow rate simulation is in progress
byte 22: (8 bits integer) measurement dynamic variation as a %
byte 23: (8 bits integer) Data Type ( see section 2.6 Data Type )
NOTE: The values in the “32 bits single precision IEEE floating point” format are floating point numbers
which can be represented during writing by any decimal digits. To keep the same numerical format visible
on the instrument display however, it is necessary to calculate the decimal figures with a rather complex
algorithm which takes account of instrument precision, flow rate measurement unit, etc. For this purpose
and to avoid useless calculations, the number of decimals to use to represent the flow rate values is supplied
separately. With the acyclic service it is possible to return the value ( see Acyclic Index Read = 20(dec)
Static Process Data of the Flow Meter byte position 13).