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Appendix C Fieldbus Parameters
FieldPoint FP-3000 User Manual C-8
©
National Instruments Corporation
FEATURE_SEL/FEATURES
The FEATURES parameter lists features supported by the device. Use the
FEATURE_SEL parameter to manually enable and disable the supported
features listed in the
FEATURES parameter. The features are listed in
Table C-5.
FF_GAIN
The gain by which the feed-forward input is multiplied before it is added to
the output value of the control block.
FF_SCALE
The scaling parameter for the feed-forward parameter.
Table C-5.
Feature Parameter Options
Option Description
Unicode The device supports strings in Unicode format. The FP-3000 does not
support this feature.
Reports The device supports event report messages for alarming. If this feature
is not selected in the
FEATURE_SEL parameter, the FP-3000 continues
to detect alarms and events, but does not report them over the bus. In
this case, the host must poll the alarm parameters to detect alarm
conditions as they change.
Faultstate The device supports Faultstate behavior for output blocks.
Soft Write Lock The device supports locking of configuration of parameters with the
WRITE_LOCK parameter in the resource block. With this feature
selected and the
WRITE_LOCK parameter written to “set,” writes to all
static configuration parameters are disallowed.
Hard Write Lock The device supports locking of configuration parameters with a switch
on the back of the FP-3000 (refer to Appendix A, Configuring the
FP-3000). If
Hard Write Lock is enabled, the switch disallows
writes to all configuration parameters in the device, including
FEATURE_SEL.
Out Readback The device provides a way for the action of output transducers to be
verified through a readback. The FP-3000 does not support this feature.
Direct Write The device provides a manufacturer-specific way to directly write to
I/O channels. The FP-3000 does not support this feature.