Raven SCS 4600, Operator'S Manual

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DISPLAY DESCRIPTION
OFF RATE % Off Rate Alarm is enacted when actual application rate (volume/area) is
off from the target rate by the specified percentage for more than 5 seconds.
PWM HIGH OFFSET Used to set the maximum desired RPM or hydraulic output of Pulse Width
Modulated control valve. To calibrate, place console in manual mode and
turn boom and master switches ON. Hold INC/DEC switch to increase. If
motor exceeds desired RPM, decrease number by 10 and push INC again.
Repeat until motor runs at desired maximum RPM, then enter a number of
10 more.
PWM LOW OFFSET Used to set the minimum desire RPM or hydraulic output (zero point of shut-
off point) of Pulse Width Modulated control valve. To calibrate, place console
in manual mode and turn boom and master switches ON. Hold INC/DEC
switch to decrease until motor stops. Increase the number until motor runs,
then enter a number of 10 less. Hold INC/DEC switch to decrease. If motor
does not stop, lower offset number by 10 and repeat.
PWM FREQUENCY Use to set the coil frequency of PWM valve (default is 122 Hz).
PRESET PWM OFFSET When valve selection is programmed in PWM-Close mode, this can be set
to provide an initial pulse width to the valve upon turning on booms or product.
When programmed to zero, pulse width will return to previous state. When
non-zero, initial pulse width can be selected between 1 (slow) and 255 (full
scale). When programmed in PWM Valve mode, PWM output will not exceed
this value if non-zero when booms are off.
RATE BUMP DELTA Sets the increment at which rate cal is increased or decreased using
INC/DEC switch while in AUTO operation.
LOW FLOW LIMIT If actual Volume/Minute falls below assigned limit, Control Valve stips
closing and Low Limit Alarm is enacted. This value is automatically
proportioned to the percentage of booms that are ON. (i.e. if the entered
low limit is 4 and half the total boom length is shut off, the console auto-
matically reduces the low limit to 2). Low Limit Value is entered in GPM
[lit/ha] or PPM [ka/ha].
LOW TANK When level in tank falls below assigned minimum level, low level alarm is
enacted. Alarm stops when a value equal to or greater than the low tank
value is entered into VOLUME/TANK or the booms are turned OFF. Entering
"0" into Low Tank Level disables it.
VALVE DELAY Set a time delay between when the booms are turned ON and when the
Console begins to control the flow rate. A value ranging from 0.1-10.0
means a delay of 0.1-10.0 seconds respectively. A value of "0" means no
delay. This delay is active if the time between turning OFF and turning ON
the booms is less than 30 seconds.
VALVE CAL 2 Can be used when programmed in PWM mode to fine tune valve control
response. Helps control oscillations. Refer to appropriate CASE IH
Applicator Manual for correct value.