Rice Lake 520 HMI Digital Weight Indicator Installation Manual - Manual (Page 71)

65 520 Indicator Installation Manual
11.0 Setpoints
The 520 indicator provides eight configurable setpoints for control of both indicator and external equipment
functions. Setpoints are configured to trip based on specified conditions; tripping the setpoint can be used to
request indicator functions (print, tare, accumulate) or to change the state of a digital output controlling external
equipment.
11.1 Batch and Continuous Setpoints
520 setpoints can be either continuous or batch setpoints.
Continuous setpoints
are free-running: the indicator constantly checks the input channel for the setpoint value
at each A/D update. If the input channel weight reading matches the setpoint value, the indicator sets the
corresponding digital output on.
Batch setpoints
are active one at a time, in an ordered sequence. The 520 can use batch setpoints to control up
to eight separate batch processing steps. A digital output associated with a batch setpoint is on until the setpoint
condition is met, then latched for the remainder of the batch sequence.
To use batch setpoints, you must activate the BATCHNG parameter on the SETPTS menu. This parameter defines
whether a batch sequence is automatic or manual. AUTO sequences repeat continuously, while MANUAL
sequences require a BATSTRT digital input or BATSTART EDP command before restarting. As shown in
Table 11-1 on page 65, GROSSSP, NETSP, and RELSP setpoint kinds can be configured as either batch or
continuous setpoints.
Note
If the checkweigh function is enabled, setpoints remain configured but do not function until checkweigh is
disabled.
The BATCH parameter must also be set on for each batch setpoint. If the setpoint is defined but the BATCH
parameter is off, the setpoint operates as a continuous setpoint, even during batch sequences.
Kind Description Batch Continuous
OFF Setpoint turned off/ignored.
GROSSSP Gross setpoint. Trips when the current gross weight matches this value.
 
NETSP Net setpoint. Trips when the current net weight matches this value.
 
+RELSP Positive relative setpoint. Trips at a specific value above the referenced setpoint.
 
–RELSP Negative relative setpoint. Trips at a specific value below the referenced
setpoint.
 
%RELSP Percent relative setpoint. Trips at a specific percentage value of the referenced
setpoint.
 
PAUSE Pauses the batch sequence indefinitely. Operator must activate the BATSTRT
digital input to continue processing.

DELAY Delays the batch sequence for a specified time. The length of the delay (in
tenths of a second) is specified on the Value parameter.

WAITSS Wait for standstill. Holds the batch sequence until the scale is at standstill.

COUNTER Specifies the number of consecutive batch sequences to perform. A
BATRESET needs to be sent (through either a serial command or digital input)
or a new counter value entered for COUNTER setpoint to function properly.

AUTOJOG Automatically jogs the previous filling operation.

COZ Center of zero. The digital output associated with this setpoint is activated
when the scale is at center of zero. No value is required for this setpoint.

INMOTON In motion. The digital output associated with this setpoint is activated when the
scale is not at standstill. No value is required for this setpoint.

INRANGE In range. The digital output associated with this setpoint is activated when the
scale is within capacity range. No value is required for this setpoint.

Table 11-1. Setpoint Kinds