Maguire Products WEIGH SCALE BLENDER WSBMB Series, Installation Operation & Maintenance

Page: 86 / 148

M A G U I R E P R O D U C T S , I N C .
86
W E I G H S C A L E B L E N D E R

_SE Use to lock out high settings or limit access
_SE is the upper SETTING limits for this component. The underscore ( _ )
represents the component number, 1 through 9,
or “A” for component 10, “B” for
componen
t 11 and “C” for component 12. This allows a reasonable cap to be set for
each component so that an operator cannot accidentally set the controls to an
excessively high setting. For additives, these limits will ensure that expensive
material is not wasted. Settings that are greater than the limit are held to the limit.
EXAMPLE: If the highest color usage in your plant is 6%, then you can enter this
upper limit in the parameter table. Since settings are stored as 1/10's of percent
(##.#), the parameter would be:
_SE 00060
Any setting above 060 is held to 6 percent.
When a 1 is entered as the first digit of this parameter, (_SE 1xxxx), setting entries
can only be made from the program mode. In this way access is limited to only those
who know the password. If a Digital Thumbwheel is assigned to a component and
that component is locked out using a 1 in the first digit of the _SE parameter, the
component setting will display on the thumbwheel but cannot be changed at the
thumbwheel display unless the operator logs into program mode.
_WT
_TI Set AUTOMATICALLY by the CALIBRATE routine
_WT, and _TI parameters are related to the flow rate or dispense rate of each
material. These can be changed manually, set by the RATE CALIBRATION routine,
or simply allowed to adjust automatically as necessary after each cycle.
_WT and _TI are WEIGHT and TIME numbers that, taken together,
indicate a dispense rate for the specified material (WT/TI). This rate is used to
calculate an exact time period to dispense the required quantity of material. Both of
these numbers are adjusted by the computer logic after each cycle as a means of
continuously calibrating the dispense times.
Since rate correction happens continuously and the battery-backed RAM maintains
the correct rate even when power has been turned off, these numbers will only be in
error during the first several cycles after a flow rate has been considerably altered.
Should there be a change in auger size, drive motor RPM, or some other change that
substantially alters the feed rate of one of the components, the _WT and _TI
parameters can be adjusted using the RATE CALIBRATION routine to ensure that
the feeders dispense properly right from the beginning without waiting for
adjustments to occur.
These numbers are always kept at higher values. The computer will bump both
numbers up in value by doubling them both until at least one number exceeds
16,000. The ratio (rate) is still the same but error correction routines work better with
higher numbers.