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8.1.5 Input/Output Status
Input/Output Status menus are used for monitoring the analog and digital inputs and outputs for advanced
diagnostics purposes.
Digital Input
The Digital Input menu allows the engineer to monitor the system digital inputs. This feature is useful for the
system trouble-shooting or diagnostics. On the screen the digital inputs are organized in columns and rows
with their code, logical states and function. Each input name is composed of the "DI" prefix and two-decimal
index, which identifies the input. For example, the digital input named "DI09" is digital input 9, which is the
ENTER key. Its logical state is shown as 0, therefore the ENTER key is not pressed or activated. When
ENTER key is pressed, its logical state will be shown as 1.
In the idle or open circuit state, all the system digital inputs are set to logical state 0. The active or closed
circuit state is logical state 1. The programmable digital inputs are marked as [PROGRAMMABLE] in this
menu.
Digital Output
The Digital Output menu allows the engineer to monitor the system digital outputs. This feature is useful for
the system trouble-shooting or diagnostics. On the screen the digital outputs are organized in columns and
rows with their code, logical states and function. Each output name is composed of the "DO" prefix and two-
decimal index, which identifies the output. For instance, the digital output named "DO21" is digital output 21,
which is used to control the Cooler. Its logical state is shown as both 0 and 1, which stands for OFF and ON
respectively as the cooler operates in an alternating mode (~3 seconds on and 7 seconds off). Upon system
power up or reset, all system digital outputs are set to logical state 0.
The programmable digital outputs are marked as [PROGRAMMABLE] in this menu.
Analog Input
The Analog Input menu allows the user to monitor the system analog inputs. This feature is useful for the
system trouble-shooting or diagnostics. On the screen the analog inputs are organized in columns and rows.
Each analog input has three parameters. The first is ADC converter digital value, the second is the input
voltage measured in volts and the third is the function. The BioTector uses a 12-bit ADC, therefore the range
of the digitized inputs are 0-4095. The voltage range is 0 to 5.00 volts.
Analog Output
The Analog Output menu allows the user to monitor the system analog outputs. This feature is useful for the
system trouble-shooting or diagnostics. On the screen, each analog output has three parameters. The first is
DAC converter digital value, the second is output voltage measured in volts and the third is the function. The
BioTector uses a 12-bit DAC, therefore the range of the digitized outputs are 0-4095. The voltage range is 0
to 10.00 volts.
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