59
HARDI MT-9000 OPERATOR’S MANUAL
from the external PC's prescribed rate, there are two methods to override
VRA mode, either Manual override or Automatic override.
Note that while in any form of "override" the console will continue to rreceive
and store any new VRA Targets sent by the PC, but it will not use them until
the user decides to re-enter VRA mode in which case the console will
immediately be synchronized with the external PC and its currently
prescribed application rate.
MANUAL OVERRIDE:
If the Master switch is moved to "MAN" the user can override the current
prescribed VRA target rate by using the adjust switch to make the necessary
adjustment to the application rate.
The user can also override a VRA "Hold" condition in a similar manner. The
external VRA program places the console in Hold by send a Target of "0",
which stops the sprayer. If the user sets the Master switch to "Man", it
overrides the PC "Hold" condition (console displays "Phold") turning the
sprayer back on and allowing the user to adjust the rate manually using the
INC/DEC switch.
To return to VRA mode, move the Master switch back to "AUTO". The
console display shows the current status prescribed by the PC, either a VRA
application rate or "Phold".
AUTOMATIC OVERRIDE:
Pressing either the Rate 2 or Rate 3 key will override VRA mode, and
instead allows the use of two alternative rates that still operate under
automatic control.
Note the differences when in Automatic Override mode:
• The "Rate" icon is now followed by a "2" or "3" which indicates the
VRA mode is not active (overridden).
• The top display will shown any new user selected Target for 2
seconds (same as in normal operation).
• The Adjust switch functions as normal, to increase or decrease
Target 2 or 3 by the "AdjustRate" amount.
If the user presses the Rate 1 key the console will reactivate VRA mode and
resume using the external PC's prescribed rate.
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