Automatic Normal Batch
This batch control is weighted automatically by controlling the full flow and dribble flow signals. The batch control is started by ‘Start (Y2/3/4/5)’ signal or "WGBATCH" instruction. The batching data must firstly be configured by special program (load cell setting program) or written into the shared memory area of WG0nA module by sequence program. Following captured screen shows the parameters needed for configuring the ‘Automatic Normal Batch’ control. This dialog box can be shown in ‘Load cell setting program’.
Dribble Flow Weight
offset 98, 144, 190, 236
If the net weight is above this weight, the dribble flow gate signal is turned off.
Full Flow Weight
offset 100, 146, 192, 238
If the net weight is above this weight, the full flow gate signal is turned off.
Over Weight
offset 102, 148, 194, 240
If the net weight is above this weight, the over signal is turned on.
Under Weight
offset 104, 150, 196, 242
If the net weight is below this weight, the under signal is turned on.
Comparator Inhibit Time after full flow start / stop
Start offset 106, 152, 198, 244
Stop offset 107, 153, 199, 245
The comparator inhibit functions are to prevent gate vibration (or other factors) from causing jitter on the comparator, which may result in incorrect batching. The comparator is inhibited for the times specified after the full flow is started and stopped.
The unit of this field is 100 milli-seconds. That is, the value of 10 means 1 second.
Batching Complete Delay
offset 112, 158, 204, 250
This sets the delay time before compensation begins. The delay time is measured from the time that the dribble flow is turned off. If no compensation is required the batch will be complete after this delay has elapsed.
The unit of this field is 100 milli-seconds. That is, the value of 10 means 1 second.
Batching Limit Time
offset 113, 159, 205, 251
If the weighing does not finish within the set time after the start of the batch the error signal (XA/B/C/D) will be turned on and the batching time out flag (bit 12th) of status word will be turned on. These signals will go off when the error clear command is issued.
This function may be disabled by specifying 0 for the time limit. And the unit of this field is 100 milli-seconds. That is, the value of 10 means 1 second.
Gate Open / Closing Time and Target Weight : Compensation
Gate open time offset : 108, 154, 200, 246
Gate close time offset : 109, 155, 201, 247
Target weight offset : 110, 156, 202, 248
If the weight is below the under weight set point after the dribble flow has been turned off, compensation is performed. The dribble flow signal is turned on (for the gate open time) and off (for the gate closing time) repeatedly until the compensation target is reached. The net weight is compared against the target weight after the gate closing time has elapsed. If the gate open or closing times are set to zero compensation will not be performed.
Micro flow gate signal has special operation patterns for each compensation mode. Following table shows the difference for each compensation mode.
Mode | Condition | Micro Flow Gate |
No Compensation | ● Target Weight is set as zero | Micro Flow Gate has the same operation pattern as Dribble Flow Gate (Fig. A) |
ON/OFF Compensation | ● ‘Under’ signal ON ● All compensation parameters are non-zero (Target Weight, Gate Open Time, Gate Close Time) | |
Continuous Compensation | ● Target Weight is non-zero ● Gate Open/Close Time is zero | Micro Flow Gate operates independently with Dribble Flow Gate (Fig. B) |
The units of ‘Gate Open / Closing Time’ fields are 100 milli-seconds. That is, the value of 10 means 1 second.