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22 | OMNI POWER AND CONTROL INTERFACE SYSTEMS
TABLE 4.3 OMNI CONTROL AND SMARTCTRL I/O PORT AND OFFSET VALUES
OmniCard
CARD #
I/O PORT*
1
794 & 795
2
794 & 795
3
794 & 795
4
794 & 795
5
794 & 795
6
794 & 795
7
794 & 795
8
794 & 795
9
794 & 795
10
794 & 795
11
794 & 795
12
794 & 795
13
794 & 795
14
794 & 795
15
794 & 795
16
794 & 795
*The Input and Output port settings are hard-coded to 794 & 795 for OmniCtrl cards. When configuring the hardware,
only port 794 needs to be entered.
**The Input port settings are hard-coded to 789 for SuperPort cards.
*** The Output port settings are hard-coded to 792 for SmartCtrl and 792 & 793 for SuperPort cards. When configuring
the hardware, only port 792 needs to be entered.
Toggle verses Level Input, and Normal versus Inverted Polarity
The default operation of a Med-Connect I/O is "Active Low," meaning that the active signal is when the power
on the Operate or Signal line drops to Ground (see Figure 2.6). Further, it defaults to an all or nothing pulse
signal. These default properties of the connection operation are termed respectively Normal Polarity, and Toggle.
The toggle input mode captures a single input event, regardless of duration. In contrast, the level input mode
continuously detects inputs as long as they are sustained.
Normal polarity responds to inputs when the switch contact is closed. Inverted polarity mode triggers inputs when
the switch contact is open, catering to various experimental requirements.
Med-PC now controls Toggle vs. Level and Normal Polarity vs. Inverted Polarity for IC-124 cards. The PCIC and
Med-PC set all inputs to "Toggle" and "Normal Polarity" mode when they are initiated.
When needed, Toggle/Level and Normal/Invert are controlled programmatically, not by DIP-switches as done in
the past. When the cabinet is first turned on or when Med-PC loads a program into a box, the cards are set to
"Toggle" and "Normal" mode by default. The settings can be switched for testing in MedTest with the buttons
next to the port number an open IC-124 GUI window. If the program requires the inputs to be in Level or Inverted
Mode, then that program needs to use those functions in the MSN protocol (Procedures and Parameters for Med-
PC p.25).
SmartCtrl INPUT
I/O OFFSET
INPUT PORT
0
780
4
781
8
782
12
783
16
784
20
785
24
786
28
787
32
788
36
789
40
790
44
791
48
792
52
793
56
794
60
795
SmartCtrl OUTPUT
INPUT OFFSET
OUTPUT
PORT***
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
-1
792
OUTPUT
OFFSET
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
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