Seed Hawk Air Drill Monitor 2008 - Manual (Page 20)

Seed Hawk Air Drill Monitor
SeedHawk Manual 01.doc Not Released Page 18
Various monitor actions depend on whether the monitor considers the drill to be active. These
decisions are described in other sections of this manual, but an example is whether to
generate an alarm for a stopped shaft.
Seeding should be active when the track drive has been coupled to the ground drive wheel.
The monitor determines whether the system is intentionally active by examining the ground
speed. This is obtained from the ground speed sensor. The monitor considers the system to
be intentionally active when the ground speed shaft sensor detects shaft rotation that
corresponds to a speed greater than 2 MPH.
The “In Motion” condition is always determined from the ground speed shaft sensor, even if
a RADAR ground speed sensor is being used. This is because lifting the implement for a
turn will stop the ground speed shaft allowing the monitor to determine that seeding is no
longer occurring even though the RADAR sensor still detects that the drill is moving. If a
Radar is installed and the speed sensor is missing from the system, the Radar will control
the 2 MPH point.
When the monitor senses the “In Motion” condition becoming freshly true or false, it emits a
double beep. This informs the operator that certain alarms will function differently.
Upon power up, if the SPEED sensor is reported as MISSING, the OK key may be
pressed to tell the system to operate without this sensor. This will result in the “In
Motion” condition appearing always true, enabling all alarms. This allows metering
shaft monitoring to work normally, as if there were motion. Whenever the ground
speed sensor is not on-line because it was skipped at learn or wake-up time, or
because of persistent serial communication errors, the internal “In Motion” condition
is set to true.
4.2.3 Should Be Seeding Alarms (SBS)
The Should be Seeding alarm is generated when the sensed implement speed drops below
2 MPH for more than 15 seconds. This is to inform the operator that the implement speed
has dropped below the speed range for normal seeding operation. The Should be Seeding
alarm is delayed for 15 seconds, to prevent nuisance alarms when making turns on
headlands.
If the system is operated without the SPEED sensor as described above, the Should be
Seeding alarm will never occur.
4.2.4 Sensor Alarms
The following list shows alarms which are generated when alarm thresholds are exceeded.
Alarm points for some sensors are fixed, while others can be changed by the user.
x
Seed Counters (variable alarm points set by operator)
x
Shaft Speeds (variable alarm points set by operator)