5/12/2017
TECH-538/D.W.O. 23160
Page 44 of 189
AI (Analog Input) channels
Although the AO block can be used to provide position feedback through BKCAL_OUT or READBACK
parameters, the AI block can be used in combination with the AO, depending only on the application and
correct configuration of the Transducer block and channels.
The channels available for the AI block are shown in the
Table 8:
Available channels in the AI block
Channel
Channel Name
Description
0
Uninitialized
Default value for AI
1
Position
Valve position
The Analog Input units of measure must be % (of full span valve position).This is the only transducer-
related unit (XD_SCALE) allowed in the ICoT FF positioner. A configuration example of AI scaling is shown
in the
Table 9:
AI Scaling
Transducer Scale (XD_SCALE)
Output Scale (OUT_SCALE)
EU at 100% (EU_100) = 100
EU at 100% (EU_100) = 100
EU at 0% (EU_0) = 0
EU at 0% (EU_0) = 0
Units Index (UNITS_INDEX) = %
Units Index (UNITS_INDEX) = %
Decimal (DECIMAL) = 3
Decimal (DECIMAL) = 3
See Section 11.4.4 for the complete list of the Analog Input function block parameters, including default
values.
