Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 671)

OCI Parameters
Chapter 38
38-5
The following parameters allow the configuration of the watchlist buffer
sizes. One parameter is available to select the foreground watchlist buffer
size for all connected OCI stations. Separate parameters are available for
each background watchlist created by connected OCI stations.
Important: We recommend not changing the defaults on any of these
watchlist buffer sizes. The default values for these watchlists are
acceptable for most applications including the BDS.
At power up the control does a memory allocation. Space for two
watchlists (one foreground and one background) is reserved for each OCI
station that can connect to your CNC (see the parameter “Maximum
Number of OCI Connections”). The more memory that is allocated for
watchlist space, the less memory that is available for other CNC functions.
The result is the control will begin to remove setup buffers for part
program execution when the watchlist buffer size is allocated as too large.
The available amount of memory on any given system depends on the
processor, features enabled, and memory upgrade options you have
purchased for the machine.
When the control has insufficient memory to create at least five setup
buffers, the control is held in E--Stop. When this occurs only watchlist #1
is created and the error message “Not Enough Setup Buffers” is returned.
Important: You can assign an OCI station to a specific watchlist buffer
when the OCI stations data server is configured. The parameter
“OCIDataBuffer” in the OCIDSCFG.INI file selects the watchlist for that
OCI station on the CNC. See your 9/Series OCI installation manual for
details. To identify the “Not Enough Setup Buffers” error your OCI station
must connect to watchlist 1.
38.4
Watchlist Buffer Size