WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 77 of 206
Relative
Index
Parameter Name
Description
Default
Value
Read/
Write
during last test.
151 SPSR_RESULT
Result
of the last Servo PID
Step Response test.
0 r
8.3.9 Analog Input Block
The Analog Input (AI) function block reads an ICoT PA input measurement via a specified
I/O channel (in this case the actual measured valve position) and makes that data available
to other Fieldbus function blocks.
The AI Function Block Parameter table contains all the parameters of the Block. All the
standard parameters were designed according to the profile 3.02.
8.3.9.1 AI Channel
The channel parameter must be set for the block to work properly. And the right value for it
is TB1 Feedback Value.
8.3.9.2 AI Scaling
When using the ICoT, the Analog Input units of measure must be % (of full span valve
position).
Table 8-7
Analog Input Scaling
Transducer Scale (PV_SCALE)
Upper Value at 100% (EU_100) =100
Lower Value at 0% (EU_0)=0
Output Scale (OUT_SCALE)
Upper Value at 100% (EU_100) =100
Lower Value at 0% (EU_0)=0
Units Index (UNITS_INDEX)=%
Decimal (DECIMAL)=0
8.3.9.3 Complete list of parameters of the AI Block
Table 8-8
Relative
Index
Parameter Name
0
BLOCK_OBJECT
1 ST_REV
2 TAG_DESC
3 STRATEGY
4 ALERT_KEY
5 TARGET_MODE
Relative
Index
Parameter Name
6 MODE_BLK
7 ALARM_SUM
8 BATCH
10 OUT
11 PV_SCALE
12 OUT_SCALE
