Справочник Пользователя для National Instruments FP-3000
Appendix C
Fieldbus Parameters
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National Instruments Corporation
C-11
L_TYPE
The linearization type. This parameter affects the way the value from the
transducer is linearized in the analog input block before it is presented as
the block output. In all cases, the
transducer is linearized in the analog input block before it is presented as
the block output. In all cases, the
FIELD_VAL
parameter behaves as
follows:
Table C-7. Operation Bitmasks
Bitmask
Description
Invert
In discrete blocks, this maps a physical state of
Discret_State_0
to
Discret_State_1
and maps every
other physical transducer state to
Discret_State_0
.
SP-PV Track in
Man
Forces the setpoint to track the process variable in
ROut
.
SP-PV Track in
LO
or
IMan
Forces the setpoint to track the process variable in
LO
or
IMan
.
SP Track Retained Target
Forces the setpoint to track the input value of the retained
target of the block. The retained target of the block is the
lowest priority mode set in the target mode field of the
target of the block. The retained target of the block is the
lowest priority mode set in the target mode field of the
MODE_BLK
parameter of the block. For example, if the
RCas
bit is set in the target mode, the setpoint tracks
RCAS_IN
. For
a list of modes in priority order, see Table 4-6 in Chapter 4,
.
Increase to Close
Remaps the block’s scaling so that as the input increases, the
output decreases.
output decreases.
Faultstate to Value
When set, the block’s faultstate behavior sets the output value
to the value in
to the value in
FSTATE_VAL
. When clear, the block’s
faultstate behavior leaves the output value at its current
setting.
setting.
Use Faultstate Value on Restart
Causes the output value of output blocks to go to faultstate
value immediately after a device restart.
value immediately after a device restart.
Target to
Man
if Faultstate Active
When set, this sets the target mode of the block to manual
mode when faultstate goes active.
mode when faultstate goes active.
Use PV for
BKCAL_OUT
When set, this uses the process variable as the value for
BKCAL_OUT
, instead of the setpoint.
Low Cutoff
When set, this enables the low cutoff parameter.
FIELD_VAL
transducer_value
XD_SCALE.EU0
–
(
)
XD_SCALE.EU100
XD_SCALE.EU0
–
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