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6-4 CALF-14="2" Weighing Mode
(Loss-In-weigh in customer programmed control mode)
Output signal
Zero band
Full
Full-flow
Medium-flow
Dribble-flow
Over limit
Under limit
• When an output condition is established, a relevant output terminal is turned on (power continuity with output COM).
• An output terminal number can be selected with OUTF-01 through OUTF-08. See {Appendix C: Function List}
• A set point signal output is turned off unconditionally when the operation mode is other than the normal mode.
Weighing process
*
Programming with a PLC (Programmable Logic Controller) is required for this weighing mode.
*
Difference from the normal batching is that the loss-in weigh has "full" output and the comparison
is done with a negative net weight.
Sequence #
1
2
3
4
5
6
7
*
Note: SQF-21/ SQF-22 setting enables to add automatically Final weight to Zero band or Full.
Therefore there is always enough ingredient left in the hopper for a measurement.
Full
Final - Optional preliminary ≤
Final -
Preliminary
Final -
Free fall
Final +
Over limit
• With the weighing hopper 2 being empty, the gross weight is within the zero
range.
• Gate G1 (Filling gate) opens.
• The weight on the display is incremented, and reaches the "Full" weight.
• The "Full" output is turned ON.
• Gate G1 closes. (Weighing hopper 2 has been filled.)
• The "Tare" signal is input.
• The display shows "0".
• Gates G2 (full-flow), G3 (medium-flow), and G4 (dribble-flow) open.
• The display shows the weight of "Final – Optional Preliminary".
• The "Optional Preliminary" output is turned ON.
• Gate G2 closes.
• The display shows the weight of "-(Final – Preliminary)".
• The "Preliminary" output is turned ON.
• Gate G3 closes.
• The display shows the weight of "-(Final – Free fall)".
• The "Final" output is turned ON.
• Gate G4 closes.
• Weighing completes at a stable display.
*
The indicator shows the final weight(negative), indicating that hopper 3 has
been filled to that weight. The use of over limit/under limit setting can check
whether the weight is within limits.
• When the volume of ingredient left in the weighing Hopper 2 becomes less
than the Zero band.
• The "Zero band" output signal is turned on.
Output condition
Gross weight
≤
Gross weight
- Net weight
≤
- Net weight
≤
- Net weight
<
Net weight
- Net weight
Process
6-6
≤ Zero band
< Final
- Under limit
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