INFICON SKY CDGxxxD (DeviceNet) - Manual (Page 23)

tira51e1 (2009-01) CDGxxxD.cp
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16 Bits are used as sensor warnings. Sensor warning byte 0 is mapped to the
device exception detail warning 1, sensor warning byte 1 is mapped to the device
exception detail warning 2.
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 0 Not at
temperature
Sensor warning byte 1
High
warning
exception
Low
warning
exception
0 0 0 0
Electronics
warning
0
8 Bits providing the current sensor alarm state of the instance. They are mapped to
device exception detail warning 0.
Data component Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Sensor alarm byte 0 0 0 0 0 0 Underrange
exceeded
Overrange
exceeded
Reading
invalid
1)
1) Logical inversion of reading valid
The S-Analog Sensor Object provides the following common services:
Service
Code
Service Name Description of Service
0E
h
Get_Attribute_Single Returns the contents of the specified attribute.
10
h
Set_Attribute_Single Modifies an attribute value.
The S-Analog Sensor Object provides the following common services:
Service
Code
Service Name Description of Service
4B
h
Zero_Adjust Used to calibrate the zero pressure value.
2 = zero adjust
The Zero_Adjust service is used to cause the S-Analog sensor object device to
modify its Offset-A attribute value (instance 1) based upon manufacturer specific
algorithms. The target value specified in the service request represents the actual
parametric measurement that the physical sensor should be reporting at the time of
the request.
There are no state transitions associated with the invocation of this service. It is,
therefore, incumbent upon the user to establish the device into the desired con-
figuration prior to, and during, the execution of these services. This will generally
involve exposing the sensor to a known environment and treating the values read
during execution of the services accordingly.
A success service response indicates that the service was accepted and the
application process started.
To perform the Zero_Adjust Request pump down to a value 2 decades below the
minimum pressure range of the gauge and then start the Zero_Adjust Request
Service with a target value of "0".
Parameter Data type Description Semantics of values
Zero_Adjust
parameter
or target
value UINT or
FLOAT
depending on
data type The target
value for the
zero calibration The value to which the attribute
6, value, will be set (always 0).
If not specified, the default value
of zero is used.
Sensor warning
Status extension
4.4.3.3 Common Services
4.4.3.4 Object–Specific
Services
Zero adjust algorithm
Zero_Adjust request service
data field parameters