Honeywell Series 8 I/O - Determining Direct;Reverse Output

6. Series 8 I/O Configuration
6.8. Defining Analog Output Channel Blocks
R500 Series 8 I/O User's Guide 189
April 2017 Honeywell
Figure 53 Analog Output conversion
Determining Direct/Reverse Output
The OPTDIR parameter allows you to specify whether the output of the data point is:
 direct acting (where 4 mA = 0%, and 20 mA = 100%), or
 reverse acting (where 4 mA = 100%, and 20 mA = 0%).
The default mode is direct acting.