IAI America SSEL - Manual (Page 399)

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Appendix
1. Utilization Examples of I/O Parameters
I/Os include general-purpose inputs/outputs and dedicated inputs/outputs. General-purpose inputs/outputs
are used by the user in SEL programs for sending/receiving ON/OFF signals to/from peripherals, among
others.
Dedicated inputs are turned ON/OFF externally to activate specific functions.
Dedicated outputs turn ON or OFF in specific conditions. (Dedicated outputs cannot be turned ON/OFF in
SEL programs.)
(1) I/O parameters
A desired input/output port can be specified as a dedicated input/output or general-purpose input/output.
Set an appropriate input function specification value in the I/O parameter (Input/output function selection
n) corresponding to the input/output port number you want to set.
The relationship of input port numbers and I/O parameter numbers is shown below.
Input port number
I/O parameter number
Input port number
I/O parameter number
Output port number
I/O parameter number