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 78 of 206
Relative
Index
Parameter Name
13 LIN_TYPE
14 CHANNEL
16 PV_FTIME
17 FSAFE_TYPE
18 FSAFE_VALUE
19 ALARM_HYS
21 HI_HI_LIM
23 HI_LIM
Relative
Index
Parameter Name
25 LO_LIM
27 LO_LO_LIM
30 HI_HI_ALM
31 HI_ALM
32 LO_ALM
33 LO_LO_ALM
34 SIMULATE
35 OUT_UNIT_TEXT
8.3.10
Analog Output Block
The Analog Output (AO) function block assigns a Fieldbus output value to the ICoT PA via
a specified I/O channel (in this case it is the setpoint for the target position of the valve).
The channel parameters must be set for the block to work properly.
The Channel input (valve current position) must be set to TB1 Feedback Value and the
Channel output (valve set point) must be set to Positioning Value.
8.3.10.1 AO
Scaling
The Analog Output units of measure must be % (of full span valve position).
Table 8-9
Analog Output Scaling
Process Value Scale (PV_SCALE)
EU at 100% (EU_100) =100
EU at 0% (EU_0)=0
Units Index (UNITS_INDEX)=% (1342)
Decimal (DECIMAL)=0
Transducer Scale (OUT_SCALE)
EU at 100% (EU_100) =100
EU at 0% (EU_0)=0
Units Index (UNITS_INDEX)=%
Decimal (DECIMAL)=0
8.3.10.2
Complete list of parameters of the AO Block
Table 8-10
Relative
Index
Parameter Name
0 BLOCK_OBJECT
1 ST_REV
2 TAG_DESC
3 STRATEGY
4 ALERT_KEY
5 TARGET_MODE
6 MODE_BLK
Relative
Index
Parameter Name
7 ALARM_SUM
8 BATCH
9 SP
11 PV_SCALE
12 READBACK
14 RCAS_IN
21 IN_CHANNEL