12 Serial Rate Control setup Rawson and New Leader
Non-GPS mode
The FM-1000 integrated display sends commands to the controller. If communication cannot be
established, it may be because the controller is set to Non GPS mode. A message displays and gives
you the option to continue in Non GPS mode.
If the controller is set to Non GPS mode, the display still shows and records as-applied rates. If a
prescription is loaded, target rates appear for reference, but these are not used by the controller. In
this mode, you must vary rates manually on the controller.
Loss of communication
In GPS mode, if communication with a Rawson controller is lost, the display does not report an error
until you cross into a region of the prescription that specifies a different rate.
In Non GPS mode, the display has no way of knowing when communication with a Rawson
controller is lost.
Special note on using a Rawson Accu-Rate controller
The display can send rates and record coverage for the Rawson Accu-Rate controller for only one
drive at a time: Drive A or Drive B.
To correctly send rates to the controller and log coverage based on the drive master switch:
1. To operate both drives, set the drive that is not being controlled by the display to Non GPS mode.
2. Connect the display Variable Rate cable to the COM port that matches the drive:
ll To control Drive A, connect to COMA.
l To control Drive B, connect to COM B. When you use Drive B, set the COM port to COM B.
Drive A does not have a configuration for this and will always use COM A.
3. Set Bit 7 mode to off. Bit 7 mode sends two prescriptions and is not supported by the display.
Version 9.25, Revision B FM-1000 Integrated Display User Guide 263
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