Specifications

Manual # 016-0159-894 Rev H 01/07
53
2-Setting Up the Controller Area
Pre Set PW
You can set an initial target pulse width value when using a valve that is programmed in
PWM Close mode. Enter a value between 1 (slow pulsed width) to 255 (full-scale
pulsed width). Viper uses this value to send an initial pulse width to the valve when the
booms or nodes are turned on. When a value is entered in this field, the PWM output
will not exceed this value when any non-zero booms are off.
When you set the value to zero, the pulse width returns to the previous state.
PW Freg
You can enter the coil frequency of the PWM valve in this field. The default value is
122 Hz.
Ratio Rate
You can set this value when using a product in an injection system that uses a hand-held
spray gun. The product is injected as a ratio to the amount of carrier product applied.
For example, if you want 12.0 ounces of product applied with every gallon of carrier
product, enter 12.0 in this field. This function works in manual mode only.
Important: This value must be set to zero (0) in a non-
chemical injection application.
Valve Delay
You can set this value to include a time delay between when the booms are turned on
and when the product nodes start to control the flow rate. Viper activates this delay if
the time between turning the boom on and off is less than 30 seconds.
Important: You must enter a value of zero if you are using a close-
type valve, such as a Fast Close or PWM Close valve. You must also
enter a value of zero when you are using a standard valve with an
injection system.
PWM
Displays the current duty cycle of the PWM valve.