TAC Xenta 913 Comissioning Guide - Xref

TAC Xenta, Engineering TAC Xenta 913 8 Configuring the TAC Xenta 913
Holding the mouse pointer over a column heading may provide additional
information about a parameter. Rows can be added to and deleted
from the table by selecting a cell in the appropriate row before clicking
Insert Row or Delete Row, respectively.
Once the necessary I/O value sets have been defined, click the Close
button to return to the Device Types Editor. The defined value sets
should then be available in the drop down Type list in the Device Types
table.
8.7 Configuring Device I/O Values
Each I/O value defined in the Device Values Editor must be configured
to match the equivalent value in a target device, as well as provide a
suitable signal for use in XBuilder. This is achieved by setting each
value's parameters appropriately, as outlined below.
A value's Type should correspond to that of the equivalent value in the
target device. In the example, the values are all of the type Real. For
most ModBus systems, the value type would be Integer, but the Integra
1580 meter is unusual because all its values are 32 bit Reals, as specified
in the IntegraComms.pdf protocol guide.
A value's Coeff is the conversion coefficient that should be applied in
order to convert the "raw" value of the target device into an "absolute"
value. In the example, most meter values are floating point and so represent
an absolute value without conversion. However, for the PF Ave
value in the example, a raw power factor value in the range of -1.0 to
1.0 is multiplied by 100 to represent the power factor as a percentage.
Note that M is related to the gradient, whereas B is related to the offset
value in the formula Y=MX + B.
2
Y = MX+0
2
Y = MX+1
1
1
B = 0 B = 1
TAC AB, March 2004 29 (44)
0-004-7898-0 (EN)