Rice Lake 920i Installation Manual V3.13 - Manual (Page 90)

84 920i Installation Manual
To begin a batch process, turn the 3-way switch to
START
momentarily. If the STOP button is pushed
during the batch process, the process halts and the
button locks in the IN position.
The
START
switch is ignored while the STOP button is
locked in the IN position. The STOP button must be
turned counterclockwise to unlock it, then released
into the OUT position to enable the 3-way switch.
To restart an interrupted batch from the step where it
left off, do the following:
1. Unlock STOP button (OUT position)
2. Turn 3-way switch to
START
To restart an interrupted batch from the first batch
step, do the following:
1. Turn 3-way switch to
ABORT
2. Unlock STOP button (OUT position)
3. Turn 3-way switch to
START
NOTE:
Use this procedure (or the BATRESET serial
command) to ini tialize the new batch routine
following any change to the setpoint configuration.
8.4 Batching Examples
Example 1
The following example is used to dispense 100-LB
drafts, automatically refilling a hopper to 1000 LB
gross weight once the gross weight has dropped below
300 LB.
Setpoint 1 ensures that the hopper has enough material
to start the batch. If the hopper weight is 100 LB or
higher, setpoint 1 is tripped.
SETPOINT=1
KIND=GROSS
VALUE=100
TRIP=HIGHER
BATCH=ON
ALARM=ON
Setpoint 2 waits for standstill, performs a tare, and
puts 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=NET
VALUE=0
TRIP=HIGHER
BATCH=OFF
Setpoint 4 is use d to dispense material from the
hopper. When the hopper weight goes below 100 LB
net the setpoint is tripped.
SETPOINT=4
KIND=–REL
VALUE=100
TRIP=LOW
BATCH=ON
DIGOUT=1
RELNUM=3
Setpoint 5 is used to evaluate the gross weight of
material in the hopper after dispensing. When the
hopper weight falls below 300 LB, digital output 2
becomes active and the hopper is refilled to 1000 LB.
SETPOINT=5
KIND=GROSS
VALUE=300
TRIP=HIGHER
HYSTER=700
BATCH=ON
DIGOUT=2
Setpoint 6 is used as a “no flow alarm”. If the process
in setpoint 4 is not completed in 10 seconds, digital
output 4 becomes active to signify a problem.
SETPOINT=6
KIND=TIMER
VALUE=100
START=4
END=5
DIGOUT=4
Example 2
The following example uses a CONCUR setpoint to
provide a two-speed simultaneous fill of a hopper to a
net weight of 1000 LB.
Setpoint 1 ensures that the gross weight is within 50
LB of gross zero.
SETPOINT=1
KIND=GROSS
VALUE=0
TRIP=INBAND
BANDVAL=50
BATCH=ON
Setpoint 2 performs a tare once the scale is at
standstill.
SETPOINT=2
KIND=WAITSS
PSHTARE=ON