Setpoints
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Level 4 submenus
VALUE
number
Setpoint value.
•For weight-based setpoints: Specifies the target weight value, 0–9999999.
•For time-based setpoints: Specifies, in 0.1-second intervals, a time value in the range 0–65535.
•For COUNTER setpoints: Specifies the number of consecutive batches to be run, 0–65535.
•For PLSCNT setpoints, specifies a number of pulses, 0–9999999, received by a pulse input card.
•For PLSRAT setpoints, specifies a pulse rate in Hz, 0-65535, received by a pulse input card.
TRIP
HIGHER
LOWER
INBAND
OUTBAND
Specifies whether the setpoint is satisfied when the weight is higher or lower than the setpoint value,
within a band established around the value, or outside of that band.
In a batch sequence with TRIP=HIGHER, the associated digital output is active until the setpoint
value is reached or exceeded; with TRIP=LOWER, the output is active until the weight goes below the
setpoint value.
BANDVAL
0.500000
0–9999999
For setpoints with TRIP=INBAND or OUTBAND, specifies a weight equal to half the band width. The
band established around the setpoint value is VALUE ±BANDVAL.
HYSTER
0
0–9999999
Specifies a band around the setpoint value that must be exceeded before the setpoint, once off, can
trip on again.
PREACT
OFF
ON
LEARN
FLOW
Allows the digital output associated with a setpoint to shut off before the setpoint is satisfied to allow
for material in suspension.
The ON value adjusts the setpoint trip value up or down (depending on the TRIP parameter setting)
from the setpoint value using a fixed value specified on the PREVAL parameter.
The LEARN value can be used to automatically adjust the preact value after each batch. LEARN com
-
pares the actual weight at standstill to the target setpoint value, then adjusts the preact PREVAL by
the PREADJ value times the difference after each batch.
FLOW preact provides dynamic compensation for material flow rate in determining when to shut off
the digital output. Rather than waiting for the specified weight to be reached, FLOW preact uses the
change in weight over time to anticipate when the TRIP minus PREACT weight value will be reached.
PREVAL
0
0–9999999
Specifies the preact value for setpoints with PREACT set to ON, LEARN, or FLOW. Depending on the
TRIP setting specified for the setpoint, the setpoint trip value is adjusted up or down by the PREVAL
value.
PREADJ
0.500000
0–9999999
Preact adjustment factor. For setpoints with PREACT set to LEARN, specifies a decimal representa
-
tion of the percentage of error correction applied (0.5 = 50%, 1.0 = 100%) each time a PREACT
adjustment is made.
PRESTAB
0
0–65535
Preact stabilization time-out. For setpoints with PREACT set to LEARN, specifies the time, in 0.1-sec
-
ond intervals, to wait for standstill before adjusting the PREACT value. Setting this parameter to a
value greater than zero disables the learn process if standstill is not achieved in the specified interval.
PCOUNT
1
0–65535
Preact learn interval. For setpoints with PREACT set to LEARN, specifies the number of batches after
which the preact value is recalculated. The default value, 1, recalculates the preact value after every
batch cycle.
TOLBAND
0
0–9999999
Tolerance band. For setpoints with TRIP set to HIGHER or LOWER, specifies a tolerance band
around the target weight. If the captured weight is not within the specified tolerance band, the preact
learn function is not applied and the batch is paused (based on the value of the TOLCNT parameter,
below) until restarted or reset.
TOLCNT
1
0–65535
Tolerance count. For setpoints with TRIP set to HIGHER or LOWER, specifies the number of consec
-
utive batch cycles in which the tolerance band (TOLBAND parameter) must be exceeded before the
batch process is paused. When the specified value is met, the batch is paused and an error message
is displayed. The batch must be restarted or reset to clear the error message. The special value of
zero means that the batch is never paused for an out-of-tolerance condition.
SETPTS Menu
Parameter
Choices
Description
Table 8-2. Setpoint Menu Parameters (Continued)
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