Chapter 536 SCS 450 Serial Interface Installation & Service ManualControl Valve Delay and Valve AdvanceThe Control Valve Delay feature allows the user to set a delay between the time the booms are turned on andwhen the console begins to control the flow rate. The delay is active if the time between turning off the boomsand turning them back on is less than 30 seconds.The Valve Advance feature allows the user to set the amount of time (in seconds) the valve is open.Press the SPEED CAL button until the console displays the message “CONTROL VALVE DELAY” and fourdigits ( X X X X ). The first digit is the Control Valve Delay value. The value (1 - 9) represents the number ofseconds of delay in turning on automatic control. A value of 0 means that there is no delay. The third digit isthe Valve Advance value. The value (1 - 9) represents the number of seconds in which the valve will be openedupon all boom sections being turned OFF in automatic control. A value of 0 means that there is no advance.Note: A beginning value of 1020 is recommended for low rate situations to build up pressure whenturning the master switch on. For best results, approach the headlands at consistent speeds whileturning all boom sections off.Zero Speed Shut-OffThe Zero Speed Shut-Off function is active when C-FC (fast-close valve) or C-PC (PWM close valve) isselected, and cannot be disabled. The valve will receive a decrease signal and run closed when the speeddrops to 0.7 mph or less. The only way the console can operate under this speed is in the manual mode.When the Zero Speed Shut-Off has occurred, the master switch must be turned off and back on to restart thesystem. If a constant speed greater than 0.7 mph is not reached within 10 seconds, the Zero Speed Shut-Offwill occur again.Data Lock FeatureThe Data Lock feature prohibits data entry without the data-lock code. The four-digit code must be enteredwithin 15 seconds.Activate the Data Lock Code1. Press the DATA MENU button until the message “PRESS ENTER FOR DATA-LOCK” appears on theconsole’s display.2. Press ENTER. The message “NEW CODE E” will appear in the display.3. Enter the 4-digit data lock code of your choice within 15 seconds.4. Press ENTER.Change the Data Lock Code1. Press the DATA MENU button until the message “PRESS ENTER FOR DATA-LOCK” appears on theconsole’s display.2. Press ENTER. The message “OLD CODE E” will appear in the display.3. Enter the old 4-digit data lock code within 15 seconds.4. Press ENTER. The message “NEW CODE E” will appear in the display.5. Enter the new 4-digit code within 15 seconds, or enter 0 to disable the Data-Lock feature.6. Press ENTER.