6. Series 8 I/O
Configuration
6.8. Defining Analog Output Channel Blocks
190
Series 8 I/O User's Guide
R500
Honeywell
April 2017
Determining Output Characterization
Output characterization is an optional function that can be implemented by setting
parameter OPCHAR to ON. When OPCHAR is set to ON, the analog output point
interpolates linearly between the two nearest values. The interpolated value becomes the
output value OPFINAL.
Further, output characterization allows you to specify an output transfer function, using
configurable X-Y coordinates that provide five linear segments as illustrated below. The
length of each segment is variable according to the coordinates OPOUT0-5 and OPIN0-
5. The end points of the curve are fixed at coordinates OPOUT0, OPIN0 (at -6.9%) and
OPOUT5, OPIN5 (at 106.9%). These coordinates are fixed at these values to ensure that
neither the characterization function nor its inverse can provide output values, which are
outside the -6.9% to 106.9% range. You enter the values for OPOUT1-4 and OPIN1-4 to
achieve the desired curve.
Figure 54 Determining fixed endpoint