Rice Lake 520 HMI Digital Weight Indicator Installation Manual - Manual (Page 76)

Setpoints 70
HYSTER number 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.
PREACT OFF
ON
LEARN
FLOW 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.
PREVAL number 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.
PREVARS PREADJ
PRESTAB
PREBAND
PRE CNT 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.
RELNUM 1–8 RELSP setpoints: Specifies the number of the relative setpoint. The target weight for
this setpoint is:
• For +RELSP, the value of the relative setpoint plus the value (VALUE parameter) of
this setpoint
• For –RELSP, the value of the relative setpoint minus the value of this setpoint
• For %RELSP, the percentage (specified on the VALUE parameter for this setpoint)
of the relative setpoint
BATCH OFF
ON GROSSSP, NETSP, and RELSP setpoint types: Specifies whether the setpoint is
used as a batch (ON) or continuous (OFF) setpoint.
PSHACCM OFF
ON
ONQUIET GROSSSP, NETSP, RELSP, PAUSE, DELAY, and WAITSS setpoint types: Specify ON
to update the accumulator and perform a print operation when the setpoint is
satisfied. Specify ONQUIET to update the accumulator without printing.
PSHPRNT OFF
ON
WAITSS GROSSSP, NETSP, RELSP, PAUSE, DELAY, and WAITSS setpoint types: Specify ON
to perform a print operation when the setpoint is satisfied; specify WAITSS to wait for
standstill after setpoint is satisfied before printing.
PSHTARE OFF
ON GROSSSP, NETSP, RELSP, PAUSE, DELAY, and WAITSS setpoint types: Specify ON
to perform an acquire tare operation when the setpoint is satisfied. NOTE: PSHTARE
acquires the tare regardless of the value specified for the REGULAT parameter on the
PROGRM menu.
SETPTS Menu
Parameter Choices Description
Table 11-2. Setpoint Menu Parameters (Continued)