Rice Lake 520 Installation Manual page 67

SETPTS Menu
Parameter Choices
Level 4 submenus
VALUE number
TRIP HIGHER
LOWER
INBAND
OUTBAND
BANDVAL number
HYSTER number
PREACT OFF
ON
LEARN
FLOW
PREVAL number
PREVARS PREADJ
PRESTAB
PREBAND
PRE CNT
62 520 Installation Manual
GROSSSP, NETSP, RELSP setpoint types: Specifies the target weight value.
DELAY, AUTOJOG, TIMER, and CONCUR setpoint types: Specifies, in 0.1-second
intervals, a time value in the range 0–65535.
COUNTER setpoint types: Specifies the number of consecutive batches to be run.
GROSSSP, NETSP, and RELSP setpoint types: Specifies whether the setpoint is
tripped 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.
GROSSSP, NETSP, and RELSP setpoint types with TRIP=INBAND or OUTBAND:
Specifies a weight equal to half the bandwidth. The band established around the
setpoint value is VALUE ±BANDVAL.
GROSSSP, NETSP, and RELSP setpoint types: Specifies a band around the setpoint
value that must be exceeded before the setpoint, once off, can trip on again.
GROSSSP, NETSP, and RELSP setpoint types: 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.
The LEARN value can be used to automatically adjust the preact value after each
batch. LEARN compares the actual weight at standstill to the target setpoint value,
then adjusts the preact by half of the difference after each batch.
The FLOW value provides 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 preact
weight value will be reached.
GROSSSP, NETSP, and RELSP setpoint types: Specifies the preact value for
setpoints with PREACT set to ON or LEARN. Depending on the TRIP setting
specified for the setpoint, the setpoint trip value is adjusted up or down by the preact
value.
GROSSSP, NETSP, and RELSP setpoint types: Specifies the preact variable for
setpoints with PREACT set to LEARN or FLOW.
PREADJ variable sets what percentage of error correction applied each time a
preact adjustment is made (default is 50%)
PRESTAB variable is timeout for PREACT LEARN value. For setpoints set to LEARN
or FLOW, PRESTAB specifies the time (in 0.1 second intervals) to wait for standstill
before adjusting the preact value. PREACT is not recalculated if standstill is not
achieved (default is 0).
PREBAND defines a band value that will prevent the PREACT from becoming
skewed if a large amount of product falls into the scale at the end of a filling cycle
(default is 0.0).
PRE CNT is PREACT LEARN interval. For setpoints set to LEARN or FLOW, PRE
CNT specifies the number of batches after which PREACT is recalculated. Default
value of 1 specifies that PREACT will be recalculated after every batch cycle.
Table 12-2. Setpoint Menu Parameters (Continued)
Description