Setpoints
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9.2 Batching Examples
9.2.1 Example 1
The following example uses seven setpoints to dispense material from a hopper in 100 lb batches and to automatically refill the
hopper when its weight drops below 300 lb.
Bits 1 and 2 in the Digital I/O menu (
) are assigned to batch start and batch run functions: BATRUN
must be on (low) before the BATSTRT input starts the batch.
SLOT 0, BIT 1=BATSTRT
SLOT 0, BIT 2=BATRUN
BATCHNG=MANUAL
Setpoint 1 ensures the hopper has enough material to start the batch. If the hopper weight is 300 lb or higher, setpoint 1 is
tripped.
SETPT 1
KIND=GROSS
VALUE=300
TRIP=HIGHER
ALARM=ON
BATCH=ON
Setpoint 2 waits for standstill, then performs a tare to put the indicator into net mode.
SETPT 2
KIND=WAITSS
PSHTARE=ON
Setpoint 3 is used as a reference (relative setpoint) for setpoint 4.
SETPT 3
KIND=NET
VALUE=0
TRIP=HIGHER
BATCH=OFF
Setpoint 4 is used to dispense material from the hopper. When the hopper weight falls to 100 lb less than its weight at the
relative setpoint (setpoint 3), digital output 1 is set off.
SETPT 4
KIND=NEGREL
VALUE=100
TRIP=LOWER
DIG OUT=1
BATCH=ON
RELNUM=3
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