User guide

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 30
False if it is not met. In Toggle mode, the input state is set to True on the first occurrence of the Active Polarity
instance and remains true until the second instance of the Active Polarity, always observing debounce time.
Software toggle changes the state of the program variable when a rising edge or falling edge is detected on the
input. For an input in Toggle mode the application program can also set the input state at any time. Digital
input 1 can be configured to be a System Enable (Emergency Stop) type. When this Software Toggle mode is
selected and the digital input is true the BIOS will automatically turn off all of the current paths to the valves and
require a power cycle to resume operation.
Note: Regardless of what type of digital input switch configuration is used, the DVC will react the same
according to the voltage seen at the input. See the hardware manual for instructions on hooking up a switch in
order to provide the desired voltage levels.
The following subsections give the definition as well as an overview of each of the fields in the Digital Input
screen:Name
Name used in the bubble logic code to access this digital inputs state and its associated properties.
Range: 16 Characters with no spaces. Valid characters are A-Z, a-z, 0-9, and "_".
Rules:
The first character cannot be a number.
Compiler Keywords or other Names already in use are not valid. A valid example is "Boom_Extend".
De-bounce Time
The number of milliseconds the system will wait after a change in voltage at the input before accepting a change
in input state.
Range: 0 to 9990ms in 10ms Increments
Polarity
Polarity High is considered true, active, on when > 2.5 Volts is sensed at the input pin.
Polarity Active Low s considered true, active, on when < 2.5 Volts is sensed at the input pin.
Range: Active High, and Active Low
Software Toggle
In Toggle Mode, the rising or falling of the digital input (with respect to debounce and polarity Active High or
Low) will reverse the state of the variable. Software Toggle gives the programmer the ability to Latch an input
variable.
Range: Toggle, No Toggle
Software Toggle
Toggle No Toggle
Active High Variable changes states when
input goes from Ground to >
2.5 Volts
Variable is true when input is >
2.5 Volts
Polarity
Active Low Variable changes states when
input goes from > 2.5 Volts to
Ground
Variable is true when input is
ground