MAGUIRE WEIGH SCALE BLENDER Installation Operation & Maintenance page 74

B L E N D E R 
W E I G H S C A L E
process, such as rotational molding. In this configuration, the thumbwheel switches tell the
controller how much weight to dispense in pounds (or kilos). The FUL parameter is set to
00001 or 00002 for direct reading of the top thumbwheel switch; or optionally, for recipe
reading of the second thumbwheel switch.
When dispense weight you request exceeds the amount specified in the MAX parameter,
the unit will automatically make multiple dispenses that will add up to the requested
amount.
Change only if material sticks in the weigh bin
TH
TL
TH and TL are acceptable error limits for TARE WEIGHT.
Before a dispense cycle begins, the software checks to see that the weigh bin is in place
and that it is not already full of material. To do this it looks at the starting TARE weight.
If Tare weight is below the value of TL, (50 grams), the software assumes that the bin is
either missing or hung up on something. In this case the ALARM sounds.
If Tare weight is above the value of TH (100 grams), the software assumes material is in
the bin. In this case the ALARM sounds and the weight bin dump flap operates in an
attempt to empty the weigh bin.
If you are processing a material that has a tendency to hang up in the corners of the bin,
then you may wish to widen the range of acceptable starting tare weight. Since tare weight
is always subtracted from dispense weights, these errors do not effect accuracy.
Change to get AUTOMATIC printing of material totals
PRT
PRT, when set to any number other then zero, will cause the processor to output all current
material usage totals, at regular time intervals, to the printer port. The number you enter
will dictate the time interval in MINUTES. All timing starts from MIDNIGHT. For example,
an entry of 00120 will cause totals to print at 2 AM, 4 AM, 6 AM, etc. Printing always waits
until a cycle has just ended. A setting of 10000 is a special case. This will cause a printout
after every cycle. A printer must be connected. If one is not, the routine will abort and
blending will continue.
_SE is the upper SETTING limits for the thumbwheel switches
RSE
CSE
This allows a reasonable cap to be set for each component so that an operator cannot
ASE
accidentally set the controls to an excessively high setting. For color and additive, these
limits will ensure that expensive material is not wasted. Thumbwheel settings that are
greater than the limit are held to the limit.
EXAMPLE:
in the parameter table. Since settings are stored as 1/10s of percent (##.#), the parameter
would be: CSE 00060
Color thumbwheel settings above 060 will be held to 6 percent.
The operator may still prevent running this component by entering a setting of all ZEROS
(00.0). This will override any setting entered by the keypad. If you do not want this
override option, enter a 1 as the first digit in the SE parameter. (_SE 1xxxx).
Digital Thumbwheel Lockout – On digital thumbwheel controllers, entering a 1 in the first
digit of the _SE parameter will prevent the corresponding thumbwheel setting from being
changed using the thumbwheel buttons. This will also require the operator to enter
If the highest color usage in your plant is 6%, you may enter this upper limit
M A G U I R E P R O D U C T S , I N C .
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