National Instruments FP-3000 - Manual (Page 74)

Chapter 4 Block Reference
FieldPoint FP-3000 User Manual 4-22 www.ni.com
Substatus
The Substatus field is used to describe more specifically the cause of the
given quality. For example, a status with the quality of Bad might have a
substatus of Device Failure , indicating that the value should not be
trusted because it is from a device that has failed. Another common
substatus is
Non-specific . The Non-specific substatus is used when
no other substatus applies. There are numerous substatuses.
Limit
Table 4-8 describes the Limit subfield values.
MODE_BLK Parameter and Mode Handling
The block’s mode behavior is controlled with the MODE_BLK parameter.
The MODE_BLK parameter contains four fields that allow the current mode
of the block to be read and the desired mode for the block to be written.
The four fields are
TARGET mode, ACTUAL mode, PERMITTED mode, and
NORMAL mode.
TARGET Mode
The desired mode of execution for the block. An operator or process
engineer normally writes this to put the block in the desired mode of
operation.
Table 4-8. Limit Values
Value Meaning
None The value is not limited.
Low The value is at a lower limit. This can be caused by
a transducer limitation or setpoint limits.
High The value is at a high limit. This can be caused by
a transducer limitation or setpoint limits.
Constant The value is at a fixed value and cannot move. This
results from the block supplying the value being in
manual mode.