GE Industrial Solutions Entellisys System User Manual - Manual (Page 137)

Discrete inputs/outputs 137
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10.1.3.2 I/O points direction
Before discrete I/Os can be used, their direction must be configured. When discrete I/O cards
are installed, all I/O points are by default treated as inputs. Change the necessary I/O directions
from Discrete Inputs/Outputs dialog box. To do so, click the User Settings button and then click
the Discrete I/O button to access the Discrete Inputs/Outputs dialog box. A column of buttons
appears on the left side of the dialog box. These buttons behave similarly to tabs. Click a button
to view the associated content in the right side of the dialog box. By default, information
associated with Discrete I/O is displayed.
Figure 10-7 Configuring discrete I/O points' direction
The list displayed in the middle of the dialog box contains two columns. The left column contains
ranges of discrete I/O points while the right column contains the corresponding direction. A
limitation of discrete I/O card hardware is that the direction of I/O points from 1 through 48 must
be configured in groups of eight while the remaining 16 I/O points can be configured separately.
The I/O points served by the card in the PMC0 slot are numbered from 1 through 64. The I/O
points associated with the second card are numbered from 65 through 128. As soon as a
direction is changed, the current number of inputs and outputs are updated in the boxes below
the table.
The Discrete Inputs/Outputs dialog box also displays the number of boards and total number of
discrete I/O points available in CPUs. These boxes are not configurable. The displayed number
of boards available in the dialog box may be different from the number of boards actually
plugged in the CPUs if there are problems with the cards themselves, or when a single card is
used and the card was plugged into the incorrect slot.