Rockwell Automation 8520-9API 9/Series OCI API Developer's Guide - Manual (Page 180)

6–12 Array Indices and Strings
Publication 8520-6.6 - August 1999
Important: Enumeration does not apply to the 9/PC CNC.
PORT_PARITY enumeration
The port_parity enumeration is used to select the parity for serial
communications. The parity enumeration is:
Enumeration: Result:
0 Odd
1 Even
2 None
Important: Enumeration does not apply to the 9/PC CNC.
PORT_ID enumeration
The port_option enumeration is used to select one of the serial
communication ports. The enumeration are:
Enumeration: Result:
1 Port A
2 Port B
Important: Enumeration does not apply to the 9/PC CNC.
PORT_TYPE enumeration
The port_type enumeration is used to select the communication type
for one of the serial communication ports. The enumeration are:
Enumeration: Result:
0 RS232C
1 RS422A
Important: Enumeration does not apply to the 9/PC CNC.