Rockwell Automation 8520-9API 9/Series OCI API Developer's Guide - Manual (Page 78)

4–30 OCI Data Server Data Items
Publication 8520-6.6 - August 1999
The port_id index must always be used with this data item. You can
not use this index to access more than one port per request. Data for
this item is enumerated as follows:
This Value: Indicates/Selects
0 3 Seconds
1 15 Seconds
2 30 Seconds
3 60 Seconds
4 120 Seconds
5 180 Seconds
6 300 Seconds
7 600 Seconds
8 Unlimited (no timeout)
For example assigning a value of 4 to the following item:
PORT_TIMEOUT_VALUE, 1
selects a timeout value of 120 seconds for port A.
RX_CHAR_PORTA(rx_char_size)
Data Type
USINT
Read/Write Read only
Array Index see RS232 charts
Control Type Lathe/Mill/Grinder
The RX_CHAR_PORTA item identifies a character received on
serial port A. The control always forces a null after each character
received over this port. So if a device sends an “A” character to this
port, this item will identify two characters received, the A followed
by the null character.
RX_CHAR_PORTB(rx_char_size)
Data Type
USINT
Read/Write Read only
Array Index see RS232 charts
Control Type Lathe/Mill/Grinder
The RX_CHAR_PORTB item identifies a character received on
serial port B. The control always forces a null after each character
received over this port. So if a device sends an “A” character to this
port, this item will identify two characters received, the A followed
by the null character.