Crystal Vision
Statesman
27/10/2006
8
GPI 36 User Manual R3.0
Input testing
A GPI line configured as an input, which is normally connected to a semiconductor
output driver, may be tested to determine if the input is open circuit (disconnected).
Note:
Input testing will not work with a non-semiconductor input such as a simple hardware
switch.
Setting the GPI active level
There is a two-button control that sets the active level of the GPI connection. When the
connection is configured as an output in salvo mode the button will indicate a pending
condition with a change in colour to dull red.
Using Salvos
A Salvo consists of a number of 'primed' output state changes that are all changed when
the Salvo button is pressed. To set one or more GPI lines using a Salvo proceed as
follows:
•
Prime one or more GPI lines for Salvo operation by checking 'OP Salvo'
•
Select the required output state – the button will change to dark red
•
Press the Salvo button – the dark red selections change to bright red and the
outputs change state
Status indicators
The ‘OP Error’ LED will illuminate red if the connection is set as an output and the
setting conflicts with the actual state - the connection is low when set high, or high when
set low. Otherwise it will be grey.
The ‘IP Active’ LED will illuminate yellow if the connection is set as an input and the
actual state matches the active state set. Otherwise it will be grey.
The ‘No connection’ LED will illuminate red if connection checking is enabled and the
check indicates an open circuit. Otherwise it will be grey.
Note:
Input testing will not work with a non-semiconductor input such as a simple hardware
switch.
