Instruction manual

6-6
6-4 CALF-14=“2” Weighing Mode
(Loss-In-weigh in customer programmed control mode)
Output signal Output condition
Zero band Gross weight
≤
Zero band
Full Full
≤
Gross weight
Full-flow Final
-
Optional preliminary
≤
- Net weight
Medium-flow Final
-
Preliminary
≤
- Net weight
Dribble-flow Final
-
Free fall
≤
- Net weight
Over limit Final
+
Over limit
<
 Net weight
Under limit
- Net weight
<
Final - 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 # Process
1
• With the weighing hopper 2 being empty, the gross weight is within the zero
range.
2
• 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.)
3
• The “Tare” signal is input.
• The display shows “0”.
4
• 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.
5
• The display shows the weight of “-(Final – Preliminary)”.
• The “Preliminary” output is turned ON.
• Gate G3 closes.
6
• 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.
7
• 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.
* 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.