Batching Examples; Example 1 - Rice Lake IQ plus 710 Installation Manual

8.2

Batching Examples

8.2.1

Example 1

The following example uses seven setpoints to
dispense material from a hopper in 100
and to automatically refill the hopper when its weight
drops below 300 .
LB
Digital inputs 1 and 2 are assigned to batch start and
batch run functions: BATRUN must be on (low)
before the BATSTRT input starts the batch.
DIGIN1=BATSTRT
DIGIN2=BATRUN
Discontinued Product
BATCHNG=MANUAL
Setpoint 1 ensures that the hopper has enough material
to start the batch. If the hopper weight is 300
higher, setpoint 1 is tripped.
SETPOINT=1
KIND=GROSSSP
VALUE=300
TRIP=HIGHER
BATCH=ON
ALARM=ON
Setpoint 2 waits for standstill, then performs a tare to
put the indicator into net mode.
SETPOINT=2
KIND=WAITSS
PSHTARE=ON
Setpoint 3 is used as a reference (relative setpoint) for
setpoint 4.
SETPOINT=3
KIND=NETSP
VALUE=0
TRIP=HIGHER
BATCH=OFF
Setpoint 4 is used to dispense material from the
hopper. When the hopper weight falls to 100
than its weight at the relative setpoint (setpoint 3),
digital output 1 is set off.
SETPOINT=4
KIND=–RELSP
VALUE=100
TRIP=LOW
BATCH=ON
DIGOUT=1
RELNUM=3
Setpoint 5 is used to evaluate the gross amount of
material in the hopper after dispensing, and to
maintain a minimum material level in the hopper.
When the hopper weight falls below 300
batches
LB
output 2 becomes active and the hopper is refilled to
1000 .
LB
SETPOINT=5
KIND=GROSSSP
VALUE=300
TRIP=HIGHER
HYSTER=700
BATCH=ON
DIGOUT=2
Setpoint 6 is used to ensure that the operation
performed in setpoint 4 is completed within 10
or
LB
seconds. The START and END parameters identify
the setpoints monitored by the timer. If the timer
expires before setpoint 5 starts, digital output 4 is
turned on as an alarm to signal a process fault.
SETPOINT=6
KIND=TIMER
VALUE=100
START=4
END=5
DIGOUT=4
Using the ACCESS Parameter
The ACCESS parameter should be set ON when
creating and testing batch routines. Once the batching
routine is complete and ready for production,
ACCESS can be set to OFF to prevent changes to the
configured setpoint value, or to HIDE to prevent
changing or viewing the value.
Setpoints with ACCESS=ON can be turned on or off
when a batch is not running by doing the following:
• To turn the setpoint off, use the
display the setpoint, then press
• To turn the setpoint on, use the
less
LB
display the setpoint, then press
, digital
LB
key to
SETPOINT
CLEAR
key to
SETPOINT
ENTER
Setpoints 57