Applied Systems Engineering ASE2000 User Manual page 41

Bits Per ... Defines the number of data bits for each point or block of points. For example, if
analogs are 12 bits each and digitals are reported in blocks of 8 bits each, then
the corresponding entries should be 12 and 8. These fields in particular should
not be changed unless absolutely certain that your device is configured different
than the protocol standard
First ... ID For each point type, contains the index of the first point returned in a
communication message. This field is present because some companies consider
the first point reported from a device to be index '1', while others consider the
first point to be index '0'. The value entered here is used for assigning point IDs
when an ID not explicitly contained in the communication message. For example,
no point ID information is contained in a Conitel message. When the protocol
message contains point ID information, such as is the case for DNP3, the
message information is always used
Analog Point Contains several fields controlling analog value conversion and display. The
Information ASE2000 provides default settings consistent with the active protocol. This field
is present and enterable because some protocols support more than one type of
analog input conversion
Raw Format Controls converting raw data bits to a numeric value
2's Compliment, Sign Magnitude, BCD, 1's compliment, and Unsigned convert the
value as described
Redac Special is used only for Redac 70H and Redac 70DE protocols
Bias 2048 is a linear conversion where a raw value of all 0's represents the
smallest negative number, all 1's represents the largest positive number, and the
mid-value ('1' in the most significant bit and all 0's elsewhere) represents 0.
Getac LP is used only for Getac 7020-LP protocol
Reverse Bias is used as the inverse of Bias-2048. Conversion is basically the
same, but the sign of the result is changed
Low and High Are used for RTU simulation and specify the minimum and maximum values
Limits the ASE2000 will transmit. They also specify the maximum value for Raw units
display (see next paragraph)
Raw Units and When the selected analog display format is "Volts per Ma", analog values are
Highest Value converted between the linear scale of
0 to High Limit to the linear scale of 0 to Highest Value
For example, consider a raw input value of 1024 and a High Limit of 2048. This
represents 50% of full scale (1024 is 50% of 2048). 50% is applied to Highest
Value, which, if 1, results in a displayed value of 50% of 1, or 0.5.
Another way of looking at this is to consider an A/D converter that accepts inputs
from 0 to 1 volt and that digitizes those inputs to a value between 0 and 2048. An
input of 0.5 volts will digitize to 1024, which the ASE2000 will display as 0.5. If the
Raw Units setting is Volts, then the full ASE2000 display is 0.5 volts.
Pulse Point Contains fields controlling pulse accumulator (counter) value conversion and
Information display.
Raw Format Is similar to that for analogs
Wrap Value is Used only for RTU simulation and specifies one more than the maximum value
the ASE2000 should transmit.
ASE2000 V2 Communication Test Set User Manual 41