INFICON HPG400-SP ATM to High-Vacuum Gauge (Profibus) - Manual (Page 30)

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tira36e1-a (0310) BPG/HPG400 v1.cp
This parameter indicates that the pressure reading is within a valid range, which
means that:
• The gauge is in the EXECUTING status.
• There is no error (ID 26, 27 or 28 of the Device Block)
• The measured value is lower than the overrange value and higher than the
underrange value.
If this value is set to zero, the pressure reading is not valid. In such a
case, either check Exception Status (ID 26, Device Block) to find out
whether there is an error or check One Of N Status Extension (ID 120,
One Of N Vacuum Gauge Transducer Block) to find out whether the
measured value is out of the specified measuring range (overrange or
underrange mode).
This parameter contains the valid maximum value of the pressure reading
(1000 mbar) in the currently selected data unit and data type.
Pressure unit Full scale
COUNTS 21 602.06
Torr 1.50×10 -2
mTorr (Micron) 1.5
mbar 2.0×10 -2
Pascal 2
Pressure unit Full scale
COUNTS 24 333
Torr 7.5006168×10 -1
mTorr (Micron) 7.5006168×10 2
mbar 1
Pascal 100
When the gauge is not in the EXECUTING status (ID 25, Device Block) or if there
is a device error, a value defined by Safe State is output as pressure value. You
can select among:
• "0"
• Full scale
• Last valid value
• Safe Value (user-definable in ID 40)
Safe State Coding PV behavior
Zero 0 The Process Value (measured value ID 19) is set
to 0.
Full Scale 1 The Process Value (measured value ID 19) is set
to the full scale value (ID 24).
Hold Last Value 2 The Process Value is set to the last valid value
obtained in the EXECUTING status.
Use Safe Value 3 The Process Value (measured value ID 19) is set
to the Safe Value (ID 40).
The Safe Value is the value output with the Process Value Parameter (ID 19) when
an error occurs or the gauge goes to the NOT EXECUTING status. If this value is
set to zero, it will remain on zero when the data unit is changed.
3.2.3.5 Reading Valid
3.2.3.6 Full Scale
BGP400-SP
HGP400-SP
3.2.3.7 Safe State
3.2.3.8 Safe Value