National Instruments FP-3000 - Manual (Page 79)

© National Instruments Corporation B-1 FieldPoint FP-3000 User Manual
B
Fieldbus Parameters
Fieldbus Parameters (In Alphabetical Order)
ACK_OPTION (Alarming)
Allows alarms to be automatically acknowledged by the block with no
outside intervention. This is useful if you are not interested in
acknowledging certain alarms from a block.
ALARM_HYS (Alarming)
The amount a value must move off an alarm limit, in percent of scale, for
the alarm to be considered clear. This helps prevent alarms from constantly
“toggling” on and off when the process value is near the configured alarm
limit.
ALARM_SUM (Alarming)
A summary of the status of alarms in the block. Allows alarms to be
disabled.
ALERT_KEY (Alarming)
A user-assigned identification number reported in alarm messages from the
block that allows HMI applications to sort and filter alarms and events. This
parameter is set for each function block to indicate which physical unit the
function block is associated with.
BAL_TIME (Tuning)
Time, in seconds, for the bias or ratio to change from the internal working
value to the operator set value. Also, the time constant used by the integral
term of the PID to obtain balance when the output is limited and the block
is in
Auto , Cas , or RCas mode.