Maguire Products VBD-150 Installation Operation & Maintenance page 35

VBD® - Vacuum Dryer®
DLA Dump Lag Time (ms) – 00100
The time, in milliseconds, that is added to every vacuum chamber dump valve
opening operation. This compensates for the dump valve opening delay caused by
the inherent lag in any mechanical device.
VGD Vacuum Gate Delay (Time in seconds) – 00303
Format: XXXYY - XXX = lower vacuum gate, YY = upper vacuum gate
The amount of time in seconds after a vacuum gates opens before the vacuum
chamber fill or dump valve can open. (Opening of Vacuum Chamber fill valve or
dump valve).
VFA Vacuum Fill Adjust (Retries, percent) – 00310
Two part parameter. The first three digits are the number of retries to fill the
Vacuum Chamber (default 3 retries). Last two digits are the minimum allowable
percent under the targeted maximum fill weight of the Vacuum Chamber (VTH
parameter). After the third failed retry the "Low Batch" alarm is generated while the
VBD continues to retry.
HDD Heat Hopper Dump Delay - Seconds - 0004
Delay in seconds between the heating system shutdown and material dump from
the heating hopper to the Vacuum Chamber. This delay allows time for the blower
to stop.
VCT Vacuum Dump Threshold – grams/second – 00115
During a Vacuum Chamber dump (into the Retention Hopper), the material flow
rate is constantly calculated. When the flow rate reaches VTT, indicating that the
chamber is empty, the Vacuum Chamber dump valve is closed.
Chamber Dump Retries (%/Retries) – 05003
CDR
Controls the Vacuum Chamber Dump Alarm.
Format: XXXYY - XXX = percentage, YY = number of retries
When the vacuum chamber dumps material into the retention hopper, if less than
50% of the material that should have dropped is detected in the retention hopper, a
dump retry will occur. After 3 failed retries a VC DUMP alarm will trigger.
RAL Residence Alarm – pounds / minutes - 05120
When the Residence Alarm is enabled, this parameter will determine when a
residence alarm will occur. This parameter contains two variables. The first two
digits are weight (in lbs or kgs) and the last three digits are minutes. For example,
if after 120 minutes there are less than 5 lbs (or kgs) of material removed from the
retention hopper, the Residence Alarm will sound (if enabled, see the Alarm Setup
menu).
BCH Batch Mode – weight (lbs/kgs) – 00000
The amount of material in pounds or kilograms that will be dried during a batch run.
LTP Loader Trip Point – weight (1/10 pound or kilogram) – 00005
If loader 2 (downstream loader) is enabled, and the amount of material in the
retention hopper is at or above this weight, the loader 2 output turns on.
Rev. August 31, 2016 – VBD-150
Maguire Products, Inc.
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