INFICON BPG402-SD ATM to Ultra-High Vacuum Gauge (DeviceNet) User Manual
Page 22
22
tira46e1 (2004-11) BPG402-SDv1.cp
16 Bits are used as sensor warnings. Bit 8
… Bit 16 are mapped to the Exception
Detail Warning 5, Bit 0
… Bit 7 are mapped to the Exception Detail Warning 4.
Data Component
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Sensor Warning Byte 0
0
0
0
0
0
0
Filament 2
Warning
Filament 2
Warning
Sensor Warning Byte 1
0
0
0
0
Pressure
too high for
degas
0
0
0
The bit "Pressure too high for degas" will be set if the pressure is above
7.2×10
-6
mbar when a degas service is requested. The bit will be reset when the
pressure is below 7.2×10
-6
mbar.
The following table shows the relation between filament status and the correspon-
ding Warning and Alarms.
Filamentstatus
Sensor
Filament 1
Warning
Sensor
Filament 2
Warning
Sensor
Filament 1
Alarm
Sensor
Filament 2
Alarm
Both filaments O.K.
0
0
0
0
Filament 1 broken
and
Filament 2 O.K.
1
0
0
0
Filament 1 O.K.
and
Filament 2 broken
0
1
0
0
Filament 1 broken
and
Filament 2 broken
1
1
1
1
Attribute
ID
Access
Rule
NV/
V
Name
DeviceNet
Data Type
Description of Attribute
Semantics of Values
3
Set / Con-
ditional:
→
Instance 1
NV
Data
Type
USINT
Determines the Data Type
of Value and all related
attributes as specified in
this table.
→ "Semantics" section below.
int
C3 hex [default]
float
CA hex
4
Get
NV
Data
Units
UINT
Determines the Units con-
text of Value and all rela-
ted attributes.
Supported Values:
Counts
1001
h
[default]
mbar
1308
h
Torr
1301
h
Pascal
1309
h
5
Get
V
Reading
Valid
BOOL
Indicates that the Value
attribute contains a valid
value.
0 = invalid
1 = valid
6
Get
V
Value
INT or speci-
fied by Data
Type
The value of the
Setpoint A (Setpoint B)
relay.
7
Get
V
Status
BYTE
Alarm and Warning State
of this object instance
→ "Semantics" section below.
Behavior as Trip Point LOW
Sensor Warning
Filament status warnings
and alarms
2.4.2.5 Instance Attributes of
Instance 21 / Setpoint A
(Instance 22 / Setpoint B)