Burkert Type 8056 - Manual (Page 14)

- 14 - RS232_485_ETP_MODBUS_BU_REV02.doc
bytes 34-37: (32 bit long integer, MSB first) everytime to 0
bytes 38-41: (32 bit long integer, MSB first) everytime to 0
bytes 42-43: (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 44: (8 bits integer) measurement samples per second (Hz)
byte 45: (8 bits integer) measurement dynamic variation as a %
To request the transmission of a single parameter, assign the values of byte 0 and byte 1 in the request as follows,
bearing in mind that the data in the memory block has fixed positions:
PARAMETRO DA LEGGERE Byte 0 Byte 1
Flow rate in % 0 4
Scale range of the flow rate in technical units 4 4
Flow rate in technical units 8 4
Flow rate measurement unit 12 5
Totalizers measurement unit 17 3
Decimal figures for the totalizers 20 1
Decimal figures for flow rate display 21 1
Totalizer for T1 22 4
Totalizer for T2 26 4
Process flags 42 2
Measurement samples per second in Hz 44 1
Measurement dynamic variation in % 45 1
NOTES:
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 (byte position 21).
The counters are expressed with a 32 bit integer. The «counter decimal figures» parameter, indicates the
point position starting from the right: 0 = no decimal, 1=1 decimal figure, and so on.
The date and time are expressed with a 32 bit integer containing the number of minutes elapsed since 01-
01-1992. To calculate the date starting from this number, see the programming examples at the end of
this manual.