Nor-Cal IQ+ Adaptive Pressure Controller - Manual (Page 27)

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IQ+ OP-LIT 9/08
8.9 - S-Analog Sensor Object
Instance ID 1, 2 (process input)
• If two pressure sensors are used,
instance 1 corresponds to the low range
pressure sensor and instance 2
corresponds to the high range pressure
sensor
• The process input value is a signed
16-bit integer encoded with least
significant byte first and scaled
according to
6000 hex = 100% of full scale sensor
reading
0000 hex = 0
• The process input signal acquisition
range is currently limited to -5% to
110%
• Attribute C7 is used to set the full scale
value of the sensor in Torr
Instance 3 (valve position)
NOTE: There is no subclass for instance 3.
• The Valve position value is a signed
16-bit integer encoded with least
significant byte first and scaled to
7FFF hex = open
0000 hex = closed
TAbLE 8.9.1 – S-ANALOG SENSOR ObJECT ATTRIbUTES; INSTANCE 1, 2
attrIBute Id
hex
ServIce Id
hex
name Format value
3 0E (get) 10 (set) Data type USINT
C3h = INT (default)
CAh = REAL
4 0E (get) 10 (set) Data units UINT
1001h = Counts (default)
1007h = Percent
1301h = Torr
5 0E (get) Reading valid BOOL
0 = invalid reading
1 = valid reading
6 0E (get) Value
Specified by
Data type
Analog input value
7 0E (get) Status BYTE See table 8.9.3
0A 0E (get) Full Scale REAL
The Value of full scale of the
sensor
C7 0E (get) 10 (set) Full Scale REAL
The Value of full scale of the
sensor
Default 0.0 Torr (instance 1)
Default 10.0 Torr (instance 2)
60 0E (get) 10 (set)
Pressure variable
mapping function
USINT 0 = None (linear)
63 0E (get) Subclass UINT 6 = Transfer function
Self-Testing
Self-Test
Exception
Idle Abort
Executing Critical Fault
Self test failed
Condition cleared
Power on
Reset
Diagnostic request
Self-test
passed
Stop request
Time out
Connection deleted
Start request
Or first valid
IO data
Abort request
Recover request
Abort request
Abort request
Critical Fault
from any state
FIGURE 8.2 - ObJECT STATE TRANSITION DIAGRAm
TAbLE 8.9.2 – S-ANALOG SENSOR ObJECT ATTRIbUTES; INSTANCE 3
attrIBute Id
hex
ServIce Id
HEx
name Format value
3 0E (get) 10 (set) Data type USINT
C3h = INT (default)
CAh = REAL
4 0E (get) 10 (set) Data units UINT
1001h = Counts (default)
1007h = Percent
1703h = Degrees
5 0E (get) Reading valid BOOL
0 = invalid reading
1 = valid reading
6 0E (get) Value
Specified by
Data type
Analog input value
7 0E (get) Status BYTE See table 9.9.3
0A 0E (get) Full Scale
Specified by
data type
The Value of full scale of
the sensor
TAbLE 8.9.3 –S-ANALOG
SENSOR ObJECT STATUS bIT mAP
BIt deFInItIon
0 High Alarm
1 Low Alarm
2 High Warning
3 Low Warning
4-7 Reserved
NOTE: High alarm and warning levels are 6000 hex for instance 1 and 7FFF hex for instance 2.
Low alarm and warning levels are 0000 hex for both instances.
TAbLE 8.9.0 - S-ANALOG SENSOR ObJECT CLASS ATTRIbUTES; INSTANCE 0
attrIBute Id
hex
ServIce Id
hex
name Format value
5F 0E (get) Active instance number UINT
1 = Low range CDG
2 = High range CDG
63 OE (get) Subclass UINT I = Instance Selector
Class ID 31
hex
Instance ID 0 (class-level)
NOTE: This class subclass only apply to
instances 1 and 2.
• Identifies the gauge providing the
pressure value for input Assemblies and
S-Single Stage Controller Object,
Instance 1