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voltage to open the valve. With this flag set the computer puts out a
voltage to close the valve. For this reverse logic to work correctly,
you must reverse the air lines to the flow control valve air cylinder.
Normal power-off position for the valve is closed. Some customers
prefer the valve open when all power is off. This option allows this
reversed "power off" position. With power on, no difference is
apparent.
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DTI (probably no need to ever change this)
DTI is the maximum TIME allowed for the weighing bin to dump at
the end of the cycle. The software will close the bin earlier if it
detects no weight change occurring. This time determines the maximum
time that is allowed for the bin to empty. We set this maximum time
limit according to the model and batch size.
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KDF, WDF (No change required)
KDF and WDF are the maximum acceptable variation in GRAMS between
two consecutive weight readings. One weight reading requires 1 second
of time. Two readings are always taken and they must be within KDF
grams of each other to be accepted as valid. Readings are taken
continuously until two consecutive readings meet the criteria. This
prevents a single accidental bump of the scale from causing a grossly
inaccurate reading. KDF is used for load cell calibration weights, WDF
for starting tare weight and component dispense weights.
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BER (change only if severe vibration causes problems)
BER is the BAILOUT ERROR weight. Dispenses are controlled by very
accurate timing. However, as a precaution, the weigh bin is constantly
monitored during each dispense. If bin weight is found to exceed
target weight during the dispense, then a BAILOUT occurs. This ends
the dispense immediately just as if the end of the dispense time period
had been reached. This in no way effects the accuracy of the remainder
of the cycle. The dispense is checked and retries will occur if
required.
A bailout does not occur unless target weight is exceeded by the
weight given in the BAILOUT ERROR parameter. This is primarily to
prevent vibration from causing a false bailout during very small
dispenses. We set this parameter to a default of 00200 (20 grams or
200 grams). If vibration is causing false bailouts, then you may want
to set a higher value in this parameter.
If the BER parameter has a 1 in the last position, (BER 00201),
then a printout will occur of all cycle data anytime a bailout occurs
for any single component. This is helpful if you want to be aware of
occurrences where dispenses significantly exceed target. This will be
the same information that you see when the PRINT flag is on (*54). A
printer must be connected.
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ROC (Allows for adding some ADDITIVE to one of the REGRIND
portions)
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