Instruction Manual
D103412X012
Detailed Setup—AO Function Block
July 2013
122
Table 4‐25. Analog Output Function Block Parameter Definitions (Continued)
Description
Initial
Value
Range
Block
Mode
RO /
RW
Index
Number
Label
PARAMETER_NAME
Grant Deny
GRANT_DENY
13
Data Type: DS‐70
Options for controlling access of host computers
and local control panels to operating, tuning, and
alarm parameters of the block.
GRANT: 1 = granted, 0= N/A
DENY: 1 = denied, 0 = N/A
GRANT 13.1 RW ALL
0: Program
1: Tune
2: Alarm
3: Local
All bits: 0
DENY 13.2 RW ALL All bits: 0
I/O Options
IO_OPTS
14 OOS
1: SP tracks PV in Man
3: SP tracks PV in LO or
Iman
4: SP Track retained
target in Man or LO
5: Increase to Close
6: Fault State to value
0=freeze
1=go to Fault State
value
7: Use Fault State
value on restart
8: Target to Man if
Fault State activated
9: Use PV for
BKCAL_OUT
0=SP
1=PV
All bits: 0
Data Type: Bit String (2 byte)
0=disable
1=enable
Allows you to select the type of tracking and the
output value when a fault condition occurs.
Status Options
STATUS_OPTS
15 OOS
4: Propagate Failure
Backward
All bits: 0
Data Type: Bit String
0=disable
1=enable
Options the user may select for the block
processing of status.
Readback
READBACK
16 RO N/A
Status
Data Type: DS‐65
Readback is the de‐characterized valve position as
reported by the transducer block parameter
FINAL_POSITION_VALUE [17]. This correlates with
the AO block parameter OUT [9], which is the
setpoint to the transducer. READBACK is the
simulated input if SIMULATE is enabled or the
transducer block feedback if SIMULATE is disabled.
Value Dynamic
Cascade Input
CAS_IN
17 ALL
Status
BAD:
NC:
const
Data Type: DS‐65
The setpoint value from another function block.
Value 0
Setpoint Rate Down
SP_RATE_DN
18 ALL
Positive, 0 disables
rate limiting PV units
+INF
Data Type: Float
Ramp rate for downward set point changes. When
the ramp rate is set to zero, the set point is used
immediately.
Setpoint Rate Up
SP_RATE_UP
19 ALL
Positive, 0 disables
rate limiting PV units
+INF
Data Type: Float
Ramp rate for upward set point changes. When the
ramp rate is set to zero, the setpoint is used
immediately.
Setpoint High Limit
SP_HI_LIM
20 ALL PV Scale +/- 10% 100
Data Type: Float
The highest set point value allowed. SP_HI_LIM
must be greater than SP_LO_LIM.
Setpoint Low Limit
SP_LO_LIM
21 ALL PV Scale +/- 10% 0
Data Type: Float
The lowest set point value allowed. SP_LO_LIM
must be less than SP_HI_LIM.
AO Channel
CHANNEL
22 OOS 1=Setpoint 1=Setpoint
Data Type: Unsigned16
Defines which transducer parameter receives the
AO output. Select Setpoint to control valve
position.
Fault State Time
FSTATE_TIME
23 ALL Positive, seconds 0
Data Type: Float
Time from failure detection to reaction if failure still
exists.
-Continued-
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