Manual

26 tira40e1 (2005-04) BCG450SDv1.cp
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
h
[default]
float CA
h
4 Get NV Data Units UINT Determines the Units
context of Value and all
related 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
specified 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
100 NV Set Setpoint
Function
USINT Defines whether the relay
is controlled by the accor-
ding potentiometer or by
the atmosphere pressure
sensor combined with the
Capacitance Diaphragm
Gauge pressure value.
0 = Setpoint (default)
1 = Atmosphere Control
101 NV Set Percentage
of
Atmosphere
1)
USINT If the pressure value
(active value) is within a
"window" specified by this
attribute from the
atmosphere pressure sen-
sor value, the relay will be
activated. For further
details → below.
0 … 140
Example:
1 1%
50 50%
default value = 5%
The upper pressure limit of the
gauge is 1500 mbar. At an
atmosphere pressure above
1000 mbar and a percentage
of atmosphere of 150% the
relay will never be activated.
102 V Get Atmosphere
reached
USINT If the pressure of the
gauge is within a percen-
tage of the atmosphere
pressure this byte has the
value 1. If the pressure is
below this window, the
value is 0.
If the device is in Safe State the value
of this attribute is "0".
1)
Atmospheric pressure threshold (→  28).
2.4.2.8 Instance Attributes of
Instance 21 / Setpoint A
(Instance 22 / Setpoint B)