AND Explosion Protected Weighing Indicator AD-4403-FP ST Series, Instruction Manual

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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.