Emerson Fisher FIELDVUE DVC6000f, Инструкция по эксплуатации

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AO Function Block
December 2009 4-77
Table 4-24. Analog Output Function Block Parameter Definitions (Continued)
Label
PARAMETER_NAME
Description
Initial
Value
Range
Block
Mode
RO /
RW
Index
Number
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.
Fault State Value
FSTATE_VAL
24 ALL PV Scale +/
−
10% 0
Data Type: Float
Preset value to use if I/O_OPTS Fault State to
Value or Use Fault State Value on Restart is set.
Back Calculation Output
BKCAL_OUT
25 RO N/A
Status Limits
Dynamic
Data Type: DS-65
The value and status required by the BKCAL_IN
input of another block to prevent reset windup
and to provide bumpless transfer to closed loop
control.
Value
Remote Cascade Input
RCAS_IN
26 ALL
Status
BAD:
NoCom:
NoVal:
const
Data Type: DS-65
Target SP and status by supervisory host
Value 0 Trk
Shed Options
SHED_OPT
27 ALL
Defined by FF spec
0=Invalid
1=Normal Shed,
Normal Return
2=Normal Shed, No
Return
3=Shed to Auto,
normal return
4=Shed to Auto, no
return. Target mode
changes to Auto on
detection of a shed
condition
5=Shed to Manual,
normal return
6=Shed to Manual,
No return. Target
mode changes to
MAN on detection of
a shed condition.
7=Shed to retained
target, normal return
8=Shed to retained
target, no return.
(Change target to
retained target)
0
Data Type: Unsigned8
Defines the action to be taken when the set point
is not updated in a remote mode.
Remote Cascade Output
RCAS_OUT
28 RO N/A
Status
Dynamic
Data Type: DS-65
Block set point and status after ramping
Value
−
Continued
−
4