Festo VMPA-FB-PS Series, Manual

Page: 60 / 96

2. MPA pressure sensor
2−12
Festo P.BE−MPA−ELECTRONIC−EN en 0804NH
Data format for pressure specifications
The data format for setting and specifying pressure values via
parameterisation is VZ+15Bit". Negative values are repre
sented in twos−complement format.
Data format
VZ + 15 Bit, negative values represented as twos−complement
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
VZ B14
MSB B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
LSB
Abbreviations used:
VZ:
mathematical sign (0 = positive value, 1 = negative value)
B0...B14: input value
D0...D15: 16 bit input data field
MSB/LSB: most significant bit / least significant bit
Tab.2/10: Data format for pressure specifications (limit values, hysteresis and current
pressure value)
When making settings using the Handheld, you can directly
enter data as numerical values.
The unit for pressure specifications, defined via the para
meter in Tab.2/4, applies to all pressure v alues (upper/lower
limit values, hysteresis and current pressure value).
Note
When changing the unit for pressure specifications, the
parameters for the limit values and hysteresis are
not
automatically converted.
When changing the unit, you must therefore be sure to
also change the parameters for the upper/lower limit
values and the hysteresis.