ICC XLTR-1000 Instruction Manual page 54

ICC
Num Positions
This field defines the number of positions associated with this service object.
Enter a value between 1 and 16.
Database Addr
This field defines the database address where the first parameter of this service
object will be mapped. Enter a value between 0 and 4094. Note that the
configuration utility will not allow entry of a starting database address that will
cause the service object to run past the end of the database. The highest valid
database address, therefore, depends on the number of parameters to be
accessed.
Multiplier
This field is the amount that associated network values are scaled by prior to
being stored into the database or after being retrieved from the database. Upon
retrieval from the database, raw data is multiplied by the multiplier to produce a
network value (to be sent to a drive). Similarly, network values (read from a drive)
are divided by the multiplier before being stored into the database.
Note that the multiplier imposes range limitations on network data values. For
example, if the multiplier is 0.01, then the network data can achieve a maximum
value of only 655 (since 65535 is the maximum value that can be stored in 16 bits
in the database).
Offset
This field is the amount added to associated network values after being scaled by
the multiplier, prior to being stored into the database or after being retrieved from
the database. Upon retrieval from the database, the offset is subtracted from the
value obtained before scaling with the multiplier to produce a network value.
Similarly, network values are divided by the multiplier and then the offset is added
before being stored into the database.
For example, a point has a raw value range of 0 to 255. The actual range of the
point is 40 to 90. In order to scale the 0 to 255 range to 40 to 90, follow Equation
6 and Equation 7 found in section 9.4.5. This results in a multiplier of 5.1 and an
offset of 40. If the actual values are to have decimal points, say we use one place
after the decimal, then the multiplier should be divided by 10 and the offset
should be multiplied by 10 to give new values of 0.51 and 400 for the multiplier
and offset, respectively.
Read Enable
Check Read to enable reading (the service object will continuously read from the
device unless a pending Write exists).
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