Rice Lake 880 Performance Series Indicator/Controller Technical/Service Manual - Manual (Page 91)

Note
Setpoints 85
8.3 Batching Examples
DIGIO, SLOT 0, BIT 1 = BATSTR
DIGIO, SLOT 0, BIT 2, 3 and 4 = OUTPUT
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.
KIND=GROSS
VALUE=100
TRIP=HIGHER
BATSEQ=ON
Setpoint 2 waits for standstill, performs a tare, and puts the indicator into net mode.
KIND=WAITSS
PSHTAR=ON
Setpoint 3 is used to dispense material from the hopper. When the hopper weight goes below 100 LB net the
setpoint is tripped.
KIND=–NET
VALUE=100
TRIP=LOWER
BATSEQ=ON
SLOT = SLOT 0
DIGOUT=2
Setpoint 4 is used to evaluate the gross weight of material in the hopper after dispensing. When the hopper weight
falls below 300 LB, digital output slot 0, bit 3, becomes active and the hopper is refilled to 1000 LB.
KIND=GROSS
VALUE=300
TRIP=HIGHER
HYSTER=700
BATSEQ=ON
SLOT = SLOT 0
DIGOUT=3
Setpoint 5 is used as a “no flow alarm”. If the process in setpoint 5 is not completed in 10 seconds, digital output
slot 0, bit 4, becomes active to signify a problem.
KIND=TIMER
VALUE=100
START=3
END=4
SLOT = SLOT 0
DIGOUT=4