Digi-Star GT465 - Manual (Page 29)

D3968 Rev A GT465 Operators Manual 29
Preset Active Signal
The Preset Active Signal function was designed to allow greater flexibility and application specific use of the
GT465 scale indicator Alarm Out relay. This feature uses a combination of settings to program the 12 volt relay
on the GT465, with the ability to enter a preset weight. With this programming control, the GT465 can be
connected to a variety of accessories such as external alarms, hydraulic solenoids, and other electronics. The
preset is activated by the START/STOP button or AutoLog for use of more hands free applications.
(For more detailed operations, please refer to document D3980 Preset Active Signal Functionality)
To enable this function set on the GT465 indicator:
1) Press 477 then Select. Press Select again to change ALP setting to “ON”. Press ON button to store.
The GT465 is now in Auto Load Preset mode. This setting allows preset weight values to be entered with
the keypad, so that the GT465 can control other functions based on a target weight. Turn this setting
OFF for normal grain cart mode.
2) Press 406 then Select. Press Select to change the RELAY function. Press ON button to store. The
RELAY function defines what function the GT465 performs when the preset weight is activated during the
unloading process. This can be held at 12 V while the preset is active (PREACT), or activate 12 V once
the preset weight is reached during unloading (PRNOPA).
3) Press 475 then Select. Type in time for PAST setting, if needed. Press ON button to store. The PAST
setting is the time (0.0 to 99.9 seconds) for the RELAY function to timeout. If RELAY is set as PREACT
and is held at 12 V during the entire unload process, this setting extends the time at which the relay
remains at 12 V. If RELAY is set as PRNOPA and activates 12 V at the end of the unload cycle, this
setting determines how long the relay stays on after the target weight is reached.
4) Press 442 then Select. Press Select to choose WEIGHT or PERCNT; WEIGHT is preferred choice for
this application. Press ON button to store. Type in TOLER value. Press ON button to store. This is
normally the weight value of grain still unloading; set to help prevent overfilling the truck. If the implement
unloads by 1000 pounds too high each time, the TOLER value should be set to 1000.
5) Use keypad to type in preset weight to be unloaded, and then press ENTER. If 5000 pounds is entered,
this is the range at which the relay functions above will activate.
Example Application 1: Grain cart with GT465 AutoLog system is to activate an external alarm light to notify truck
driver that cart is unloading. Truck is allowed to hold 40,000 pounds. Grain cart operator opens and closes
doors, and wants to make sure an additional 30 seconds are allowed for cleanout before truck drives away.
Set 477 ALP to ON. Set 406 RELAY to PREACT. Set 475 PAST to 30.0. Press 40000 then ENTER to store
preset weight value. Connect green DC Output wire to external alarm light +12V, black to – /Ground.
Operation: Start PTO, GT465 automatically loads 40,000 pound preset, external alarm light flashes for truck
driver. Open door to unload grain, then close door when near 40,000 pounds. Target weight is reached; 30
second delay time begins to give cart operator time to clean out auger and turn off PTO. After 30 seconds,
external alarm light turns off, data is logged, and truck drives away.
Example Application 2: Grain cart with GT465 AutoLog system is to activate an alarm in tractor cab for 10
seconds to notify operator once 35,000 pounds is unloaded, so that the door can be closed. The operator has a
history of overloading the truck by 5000 pounds each time.
Set 477 ALP to ON. Set 406 RELAY to PRNOPA. Set 475 PAST to 10.0. Set 442 to WEIGHT; TOLER to 5000.
Press 35000 then ENTER to store preset weight. Connect green DC Output wire to alarm +12V, black to ground.
Operation: Start PTO, GT465 automatically loads 35,000 pound preset. Open door to unload grain. Target
weight is reached 5000 pounds early, sounding alarm for operator to close the door. The preset is deactivated at
30,000 pounds to correct for overfill, and the data is logged when the PTO is stopped.